Fermi resonance in the radiative vibrational cooling dynamics of N2O+ S. Harayama; S. Kuma; N. Kimura; K. C. Chartkunchand; M. Baba; T. Murakami; T. Takayanagi; K. Yagi; T. Yamaguchi; Y. Nakano; T. Azuma
Physical Review A, 2025年03月
研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevA.111.032803DOI ID：10.1103/PhysRevA.111.032803,
ORCID：179442557 Performance of a precise isochronous magnetic field over a wide momentum range in the Rare-RI Ring Y. Abe; Y. Yamaguchi; M. Wakasugi; H. Baba; T. Fujinawa; Z. Ge; A. Goto; S. Michimasa; H. Miura; T. Moriguchi; D. Nagae; S. Naimi; J. Ohnishi; S. Omika; S. Ota; A. Ozawa; F. Suzaki; H. Suzuki; S. Suzuki; N. Tadano; A. Tokuchi; T. Uesaka; K. Wakayama; T. Yamaguchi; Y. Yano
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：1072,
開始ページ：170083,
終了ページ：170083, 2025年03月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2024.170083DOI ID：10.1016/j.nima.2024.170083,
ISSN：0168-9002 Nuclear astrophysics in the storage ring: background suppressed simultaneous measurement of (p, g) and (p, n) reactionsL. Varga; J. Glorius; M. Aliotta; K. Blaum; L. Bott; C. Brandau; B. Brückner; C. G. Bruno; X. Chen; R. Chen; S. Dababneh; T. Davinson; D. Dmytriiev; S. F. Dellmann; I. Dillmann; P. Erbacher; S. Fiebiger; O. Forstner; T. Gaßner; K. Göbel; S. Goriely; C. J. Griffin; R. E. Grisenti; M. Groothuis; A. Gumberidze; G. Gyürky; M. Heil; R. Hensch; R. Hess; P.-M. Hillenbrand; P. Hillmann; O. Hinrichs; R. Joseph; B. Jurado; T. Kausch; K. Khasawneh; A. Khodaparast; T. Kisselbach; N. Klapper; C. Kozhuharov; D. Kurtulgil; G. J. Lane; C. Langer; G. Leckenby; C. Lederer-Woods; M. Lestinsky; Yu. A. Litvinov; S. Litvinov; B. Löher; E. Lorenz; B. Lorentz; P. Marini; J. Marsh; E. Menz; T. Morgenroth; T. T. Nguyen; F. Nolden; N. Petridis; U. Popp; A. Psaltis; M. Reed; R. Reifarth; M. S. Sanjari; D. Savran; M. Sguazzin; H. Simon; R. S. Sidhu; Z. Slavkovská; U. Spillmann; M. Steck; T. Stöhlker; J. Stumm; A. Surzhykov; J. Swartz; T. Szücs; A. Taremi Zadeh; B. Thomas; S. Yu. Torilov; H. Törnqvist; M. Träger; C. Trageser; S. Trotsenko; D. Vescovi; M. Volknandt; H. Weick; M. Weigand; C. Wolf; P. J. Woods; Y. M. Xing; T. Yamaguchi
Physical Review Letters,
巻：134,
号：8, 2025年02月
We report the application of the new elimination of Rutherford elastic scattering technique for the measurement of proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in a background reduction factor of about 1 order of magnitude, enabling the first measurement of a (p, n) cross section in a storage ring. Here, the reaction channels Xe124(p,n) and Xe124(p,γ) have been studied just above the neutron threshold energy. The new data provide valuable constraints for Hauser-Feshbach theory and extrapolation of the (p,γ) cross section to lower energies. Most importantly, for nuclei of limited availability, the method represents a powerful improvement to efficiently study proton-induced reactions at energies within or close to the astrophysical Gamow window, bringing many reaction measurements within reach that were previously inaccessible in the laboratory.
Published by the American Physical Society 2025
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.134.082701DOI ID：10.1103/physrevlett.134.082701,
ISSN：0031-9007,
eISSN：1079-7114 Bound-State Beta Decay of Tl20581+ Ions and the LOREX ProjectR. S. Sidhu; G. Leckenby; R. J. Chen; R. Mancino; T. Neff; Yu. A. Litvinov; G. Martínez-Pinedo; G. Amthauer; M. Bai; K. Blaum; B. Boev; F. Bosch; C. Brandau; V. Cvetković; T. Dickel; I. Dillmann; D. Dmytriiev; T. Faestermann; O. Forstner; B. Franczak; H. Geissel; R. Gernhäuser; J. Glorius; C. J. Griffin; A. Gumberidze; E. Haettner; P.-M. Hillenbrand; P. Kienle; W. Korten; Ch. Kozhuharov; N. Kuzminchuk; K. Langanke; S. Litvinov; E. Menz; T. Morgenroth; C. Nociforo; F. Nolden; M. K. Pavićević; N. Petridis; U. Popp; S. Purushothaman; R. Reifarth; M. S. Sanjari; C. Scheidenberger; U. Spillmann; M. Steck; Th. Stöhlker; Y. K. Tanaka; M. Trassinelli; S. Trotsenko; L. Varga; M. Wang; H. Weick; P. J. Woods; T. Yamaguchi; Y. H. Zhang; J. Zhao; K. Zuber
Physical Review Letters,
巻：133,
号：23, 2024年12月
Stable Tl205 ions have the lowest known energy threshold for capturing electron neutrinos (νe) of Eνe≥50.6 keV. The Lorandite Experiment (LOREX), proposed in the 1980s, aims at obtaining the longtime averaged solar neutrino flux by utilizing natural deposits of Tl-bearing lorandite ores. To determine the νe capture cross section, it is required to know the strength of the weak transition connecting the ground state of Tl205 and the 2.3 keV first excited state in Pb205. The only way to experimentally address this transition is to measure the bound-state beta decay (βb) of fully ionized Tl81+205 ions. After three decades of meticulous preparation, the half-life of the βb decay of Tl81+205 has been measured to be 291−27+33 days using the Experimental Storage Ring (ESR) at GSI, Darmstadt. The longer measured half-life compared to theoretical estimates reduces the expected signal-to-noise ratio in the LOREX, thus challenging its feasibility.
Published by the American Physical Society 2024
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.133.232701DOI ID：10.1103/physrevlett.133.232701,
ISSN：0031-9007,
eISSN：1079-7114 Development of a low energy loss micro-channel plate based position-sensitive detector for the Rare Radio-Isotope Ring G. Hudson-Chang; S. Naimi; Y. Abe; R. Crane; H.F. Li; T. Moriguchi; M. Mukai; D. Nagae; A. Ozawa; S. Suzuki; T. Uesaka; T. Yamaguchi; Y. Yamaguchi; A. Yano
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：1069,
開始ページ：169980,
終了ページ：169980, 2024年12月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2024.169980DOI ID：10.1016/j.nima.2024.169980,
ISSN：0168-9002 Nuclear Structure of Dripline Nuclei Elucidated through Precision Mass Measurements of 23Si, 26P, 27, 28S, and 31ArY. Yu; Y. M. Xing; Y. H. Zhang; M. Wang; X. H. Zhou; J. G. Li; H. H. Li; Q. Yuan; Y. F. Niu; Y. N. Huang; J. Geng; J. Y. Guo; J. W. Chen; J. C. Pei; F. R. Xu; Yu. A. Litvinov; K. Blaum; G. de Angelis; I. Tanihata; T. Yamaguchi; X. Zhou; H. S. Xu; Z. Y. Chen; R. J. Chen; H. Y. Deng; C. Y. Fu; W. W. Ge; W. J. Huang; H. Y. Jiao; Y. F. Luo; H. F. Li; T. Liao; J. Y. Shi; M. Si; M. Z. Sun; P. Shuai; X. L. Tu; Q. Wang; X. Xu; X. L. Yan; Y. J. Yuan; M. Zhang
Physical Review Letters,
巻：133,
号：22, 2024年11月
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.133.222501DOI ID：10.1103/physrevlett.133.222501,
ISSN：0031-9007,
eISSN：1079-7114 High-temperature 205Tl decay clarifies 205Pb dating in early Solar SystemGuy Leckenby; Ragandeep Singh Sidhu; Rui Jiu Chen; Riccardo Mancino; Balázs Szányi; Mei Bai; Umberto Battino; Klaus Blaum; Carsten Brandau; Sergio Cristallo; Timo Dickel; Iris Dillmann; Dmytro Dmytriiev; Thomas Faestermann; Oliver Forstner; Bernhard Franczak; Hans Geissel; Roman Gernhäuser; Jan Glorius; Chris Griffin; Alexandre Gumberidze; Emma Haettner; Pierre-Michel Hillenbrand; Amanda Karakas; Tejpreet Kaur; Wolfram Korten; Christophor Kozhuharov; Natalia Kuzminchuk; Karlheinz Langanke; Sergey Litvinov; Yuri A. Litvinov; Maria Lugaro; Gabriel Martínez-Pinedo; Esther Menz; Bradley Meyer; Tino Morgenroth; Thomas Neff; Chiara Nociforo; Nikolaos Petridis; Marco Pignatari; Ulrich Popp; Sivaji Purushothaman; René Reifarth; Shahab Sanjari; Christoph Scheidenberger; Uwe Spillmann; Markus Steck; Thomas Stöhlker; Yoshiki K. Tanaka; Martino Trassinelli; Sergiy Trotsenko; László Varga; Diego Vescovi; Meng Wang; Helmut Weick; Andrés Yagüe Lopéz; Takayuki Yamaguchi; Yuhu Zhang; Jianwei Zhao
Nature,
巻：635,
号：8038,
開始ページ：321,
終了ページ：326, 2024年11月
Abstract
Radioactive nuclei with lifetimes on the order of millions of years can reveal the formation history of the Sun and active nucleosynthesis occurring at the time and place of its birth
1,2. Among such nuclei whose decay signatures are found in the oldest meteorites,
205Pb is a powerful example, as it is produced exclusively by slow neutron captures (the s process), with most being synthesized in asymptotic giant branch (AGB) stars
3–5. However, making accurate abundance predictions for
205Pb has so far been impossible because the weak decay rates of
205Pb and
205Tl are very uncertain at stellar temperatures
6,7. To constrain these decay rates, we measured for the first time the bound-state β
− decay of fully ionized
205Tl
81+, an exotic decay mode that only occurs in highly charged ions. The measured half-life is 4.7 times longer than the previous theoretical estimate
8 and our 10% experimental uncertainty has eliminated the main nuclear-physics limitation. With new, experimentally backed decay rates, we used AGB stellar models to calculate
205Pb yields. Propagating those yields with basic galactic chemical evolution (GCE) and comparing with the
205Pb/
204Pb ratio from meteorites
9–11, we determined the isolation time of solar material inside its parent molecular cloud. We find positive isolation times that are consistent with the other s-process short-lived radioactive nuclei found in the early Solar System. Our results reaffirm the site of the Sun’s birth as a long-lived, giant molecular cloud and support the use of the
205Pb–
205Tl decay system as a chronometer in the early Solar System.
Springer Science and Business Media LLC, 研究論文（学術雑誌）
DOI：https://doi.org/10.1038/s41586-024-08130-4DOI ID：10.1038/s41586-024-08130-4,
ISSN：0028-0836,
eISSN：1476-4687 Investigation of direct nuclear reactions in a storage ring using in-ring detectionJ. C. Zamora; T. Aumann; S. Bagchi; S. Bishop; M. Bo; S. Bönig; C. Brandau; M. Csatlós; T. Davinson; I. Dillmann; C. Dimopoulou; D. T. Doherty; P. Egelhof; V. Eremin; A. Estrade; A. Evdokimovc; J. L. Ferreira; T. Furuno; H. Geissel; R. Gernhäuser; A. Gumberidze; M. N. Harakeh; A.-L. Hartig; M. Heil; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; Th. Kröll; M. Kuilman; C. Lederer-Woods; S. Litvinov; Yu. A. Litvinov; G. Lotay; J. Lubian; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; N. Petridis; U. Popp; R. Reifarth; C. Rigollet; S. Roy; C. Scheidenberger; M. von Schmid; M. Steck; Th. Stöhlker; B. Streicher; L. Stuhl; M. Thürauf; S. Trotsenko; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; X. L. Yan; K. Yue; J. Zenihiro
Physical Review C,
巻：110,
号：4, 2024年10月
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevc.110.044614DOI ID：10.1103/physrevc.110.044614,
ISSN：2469-9985,
eISSN：2469-9993 Size distribution of helium droplets in the condensation regime of a pulsed beam A. Iguchi; A. Hirota; S. Menk; T. Yamaguchi; H. Tanuma; J. R. Harries; S. Kuma; T. Azuma
Low Temperature Physics, 2024年09月
研究論文（学術雑誌）
DOI：https://doi.org/10.1063/10.0028187DOI ID：10.1063/10.0028187,
ORCID：166825595 Measurement of the Isolated Nuclear Two-Photon Decay in Ge72D. Freire-Fernández; W. Korten; R. J. Chen; S. Litvinov; Yu. A. Litvinov; M. S. Sanjari; H. Weick; F. C. Akinci; H. M. Albers; M. Armstrong; A. Banerjee; K. Blaum; C. Brandau; B. A. Brown; C. G. Bruno; J. J. Carroll; X. Chen; C. J. Chiara; M. L. Cortes; S. F. Dellmann; I. Dillmann; D. Dmytriiev; O. Forstner; H. Geissel; J. Glorius; A. Görgen; M. Górska; C. J. Griffin; A. Gumberidze; S. Harayama; R. Hess; N. Hubbard; K. E. Ide; Ph. R. John; R. Joseph; B. Jurado; D. Kalaydjieva; Kanika; F. G. Kondev; P. Koseoglou; G. Kosir; Ch. Kozhuharov; I. Kulikov; G. Leckenby; B. Lorenz; J. Marsh; A. Mistry; A. Ozawa; N. Pietralla; Zs. Podolyák; M. Polettini; M. Sguazzin; R. S. Sidhu; M. Steck; Th. Stöhlker; J. A. Swartz; J. Vesic; P. M. Walker; T. Yamaguchi; R. Zidarova
Physical Review Letters,
巻：133,
号：2, 2024年07月
The nuclear two-photon or double-gamma (2γ) decay is a second-order electromagnetic process whereby a nucleus in an excited state emits two gamma rays simultaneously. To be able to directly measure the 2γ decay rate in the low-energy regime below the electron-positron pair-creation threshold, we combined the isochronous mode of a storage ring with Schottky resonant cavities. The newly developed technique can be applied to isomers with excitation energies down to ∼100 keV and half-lives as short as ∼10 ms. The half-life for the 2γ decay of the first-excited 0+ state in bare Ge72 ions was determined to be 23.9(6) ms, which strongly deviates from expectations.
Published by the American Physical Society 2024
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.133.022502DOI ID：10.1103/physrevlett.133.022502,
ISSN：0031-9007,
eISSN：1079-7114 Isochronous mass spectrometry at the RIKEN Rare-RI Ring facility D.Nagae; S. Omika; Y. Abe; Y. Yamaguchi; F.Suzaki; K.Wakayama; N.Tadano; R.Igosawa; K.Inomata; H.Arakawa; K.Nishimuro; T.Fujii; T.Mitsui; T.Suzuki; S.Suzuki; T.Moriguchi; M.Amano; D.Kamioka; A.Ozawa; S. Naimi; Zhuang GE; Y. Yanagisawa; H.Baba; S.Michimasa; S.Ota; G. Lorusso; Yu. A. Litvinov; M.Wakasugi; T.Uesaka; Y. Yano
Physical Review C,
巻：110,
号：1,
開始ページ：014310/1, 2024年07月,
［査読有り］英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.110.014310DOI ID：10.1103/PhysRevC.110.014310 Charge-changing cross sections and charge radii of B, C, and N isotopes Ryo Taguchi; Mitsunori Fukuda; Gen Takayama; Miki Fukutome; Masaomi Tanaka; Kazuya Takatsu; Daiki Nishimura; Hiroyuki Takahashi; Sora Sugawara; Mototsugu Mihara; Yoko Kimura; Kaoru Watanabe; Takashi Ohtsubo; Maya Takechi; Mizuki Ogose; Norihide Noguchi; Yukiya Kobayashi; Yuki Tazawa; Natsuki Shindo; Takuji Izumikawa; Chihaya Fukushima; Takeshi Suzuki; Takayuki Yamaguchi; Akira Ozawa; Tetsuaki Moriguchi; Asahi Yano; Shinji Sato; Shigekazu Fukuda; Atsushi Kitagawa
2024年06月,
［査読有り］研究論文（学術雑誌）
DOI：https://doi.org/10.1007/s10751-024-01943-9DOI ID：10.1007/s10751-024-01943-9 Charge-changing cross sections for mirror nuclear pair, $$^{22}$$Ne and $$^{22}$$MgSoshi Ishitani; Mitsunori Fukuda; Miki Fukutome; Gen Takayama; Ryo Taguchi; Kaoru Watanabe; Masaomi Tanaka; Takashi Ohtsubo; Norihide Noguchi; Kazuya Takatsu; Yukiko Ota; Takeshi Suzuki; Takayuki Yamaguchi; Masanori Kanda; Naru Shinozaki; Daiki Nishimura; Hiroyuki Takahashi; Sora Sugawara; Chiaki Une; Chiaki Une; Akira Ozawa; Tetsuaki Moriguchi; Naoto Kaname; Asahi Yano; Atsuyuki Moriyama; Shinji Sato; Shigekazu Fukuda; Atsushi Kitagawa
Interactions,
巻：245,
号：1, 2024年04月
Springer Science and Business Media LLC, 研究論文（学術雑誌）
DOI：https://doi.org/10.1007/s10751-024-01874-5DOI ID：10.1007/s10751-024-01874-5,
eISSN：3005-0731 Ground-state mass of 22Al and test of state-of-the-art ab initio calculations*M.Z. 铭泽 Sun 孙; Y. 越 Yu 于; X.P. 新鹏 Wang 王; M. 猛 Wang 王; J.G. 健国 Li 李; Y.H. 玉虎 Zhang 张; K. Blaum; Z.Y. 祖毅 Chen 陈; R.J. 瑞九 Chen 陈; H.Y. 涵宇 Deng 邓; C.Y. 超义 Fu 付; W.W. 文文 Ge 葛; W.J. 文嘉 Huang 黄; H.Y. 红扬 Jiao 焦; H.H. 红蕙 Li 李; H.F. 宏福 Li 李; Y.F. 胤芳 Luo 罗; T. 挺 Liao 廖; Yu.A. Litvinov; M. 敏 Si 司; P. 鹏 Shuai 帅; J.Y. 金阳 Shi 史; Q. 茜 Wang 王; Y.M. 元明 Xing 邢; X. 星 Xu 徐; H.S. 瑚珊 Xu 徐; F.R. 甫荣 Xu 许; Q. 琪 Yuan 袁; T. Yamaguchi; X.L. 鑫亮 Yan 颜; J.C. 建成 Yang 杨; Y.J. 有进 Yuan 原; X.H. 小红 Zhou 周; X. 旭 Zhou 周; M. 敏 Zhang 张; Q. 奇 Zeng 曾
Chinese Physics C,
巻：48,
号：3,
開始ページ：034002,
終了ページ：034002, 2024年03月
Abstract
The ground-state mass excess of the drip-line nucleus Al is measured for the first time as keV using the newly-developed B ρ-defined isochronous mass spectrometry method at the cooler storage ring in Lanzhou. The new mass excess value allowed us to determine the excitation energies of the two low-lying states in Al with significantly reduced uncertainties of 51 keV. When compared to the analogue states in its mirror nucleus F, the mirror energy differences of the two states in the Al- F mirror pair are determined to be keV and keV. The excitation energies and mirror energy differences are used to test the state-of-the-art ab initio valence-space in-medium similarity renormalization group calculations with four sets of interactions derived from the chiral effective field theory. The mechanism leading to the large mirror energy differences is investigated and attributed to the occupation of the orbital.
IOP Publishing, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/1674-1137/ad1a0aDOI ID：10.1088/1674-1137/ad1a0a,
ISSN：1674-1137,
eISSN：2058-6132 Storage, accumulation and deceleration of secondary beams for nuclear astrophysics J. Glorius; Yu. A. Litvinov; M. Aliotta; F. Amjad; B. Brückner; C.G. Bruno; R. Chen; T. Davinson; S.F. Dellmann; T. Dickel; I. Dillmann; P. Erbacher; O. Forstner; H. Geissel; C.J. Griffin; R. Grisenti; A. Gumberidze; E. Haettner; R. Hess; P.-M. Hillenbrand; C. Hornung; R. Joseph; B. Jurado; E. Kazanseva; R. Knöbel; D. Kostyleva; C. Kozhuharov; N. Kuzminchuk; C. Langer; G. Leckenby; C. Lederer-Woods; M. Lestinsky; S. Litvinov; B. Löher; B. Lorenz; E. Lorenz; J. Marsh; E. Menz; T. Morgenroth; I. Mukha; N. Petridis; U. Popp; A. Psaltis; S. Purushothaman; R. Reifarth; E. Rocco; P. Roy; M.S. Sanjari; C. Scheidenberger; M. Sguazzin; R.S. Sidhu; U. Spillmann; M. Steck; T. Stöhlker; J.A. Swartz; Y.K. Tanaka; H. Törnqvist; L. Varga; D. Vescovi; H. Weick; M. Weigand; P.J. Woods; T. Yamaguchi; J. Zhao
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms,
巻：541,
開始ページ：190,
終了ページ：193, 2023年08月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2023.04.059DOI ID：10.1016/j.nimb.2023.04.059,
ISSN：0168-583X Matter radius of the doubly-magic $$^{56}$$Ni measured in a storage ringM. von Schmid; T. Aumann; S. Bagchi; S. Bönig; M. Csatlós; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhäuser; M. N. Harakeh; A.-L. Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; Th. Kröll; M. Kuilman; S. Litvinov; Yu. A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; R. Roth; S. Roy; C. Scheidenberger; M. Steck; B. Streicher; L. Stuhl; M. Thürauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. C. Zamora Cardona; J. Zenihiro
The European Physical Journal A,
巻：59,
号：4, 2023年04月
Abstract
The matter radius of the doubly magic $$^{56}$$Ni was extracted from a measurement of the differential cross section by employing, for the first time, elastic proton scattering in inverse kinematics with a radioactive beam at $$E_{kin}=390.2$$ MeV/nucleon circulating in a storage ring and passing an internal hydrogen gas-jet target with a revolution frequency of around 2 MHz. The novel experimental scheme is based on UHV-compatible Si detectors operated as active vacuum windows, which were implemented in the ESR storage ring at GSI. A matter radius $$<r_{m}^{2}>^{1/2}=3.74^{+0.03}_{-0.06}$$ fm was extracted for the doubly-magic self-conjugate nucleus $$^{56}$$Ni.
Springer Science and Business Media LLC, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epja/s10050-023-00967-zDOI ID：10.1140/epja/s10050-023-00967-z,
eISSN：1434-601X Proton capture on stored radioactive 118Te ionsS. F. Dellmann; J. Glorius; Y. A. Litvinov; R. Reifarth; K. Al-Khasawneh; M. Aliotta; L. Bott; B. Brückner; C. Bruno; R. J. Chen; T. Davinson; T. Dickel; I Dillmann; D. Dmytriev; P. Erbacher; D. Freire-Fernández; O. Forstner; H. Geissel; K. Göbel; C. J. Griffin; R. Grisenti; A. Gumberidze; E. Haettner; S. Hagmann; M. Heil; R. Heß; P.-M. Hillenbrand; R. Joseph; B. Jurado; C. Kozhuharov; I. Kulikov; B. Löher; C. Langer; G. Leckenby; C. Lederer-Woods; M. Lestinsky; S. Litvinov; B. A. Lorenz; E. Lorenz; J. Marsh; E. Menz; T. Morgenroth; N. Petridis; J. Pibernat; U. Popp; A. Psaltis; S. Sanjari; C. Scheidenberger; M. Sguazzin; R. S. Sidhu; U. Spillmann; M. Steck; T. Stöhlker; A. Surzhykov; J. A. Swartz; H. Törnqvist; L. Varga; D. Vescovi; H. Weick; M. Weigand; P. Woods; Y. Xing; T. Yamaguchi
EPJ Web of Conferences,
巻：279,
開始ページ：11018,
終了ページ：11018, 2023年03月
Experimental determination of the cross sections of proton capture on radioactive nuclei is extremely difficult. Therefore, it is of substantial interest for the understanding of the production of the p-nuclei. For the first time, a direct measurement of proton-capture cross sections on stored, radioactive ions became possible in an energy range of interest for nuclear astrophysics. The experiment was performed at the Experimental Storage Ring (ESR) at GSI by making use of a sensitive method to measure (p,γ) and (p,n) reactions in inverse kinematics. These reaction channels are of high relevance for the nucleosyn-thesis processes in supernovae, which are among the most violent explosions in the universe and are not yet well understood. The cross section of the
118Te(p,γ) reaction has been measured at energies of 6 MeV/u and 7 MeV/u. The heavy ions interacted with a hydrogen gas jet target. The radiative recombination process of the fully stripped
118Te ions and electrons from the hydrogen target was used as a luminosity monitor. An overview of the experimental method and preliminary results from the ongoing analysis will be presented.
EDP Sciences, 研究論文（学術雑誌）
DOI：https://doi.org/10.1051/epjconf/202327911018DOI ID：10.1051/epjconf/202327911018,
eISSN：2100-014X $$B\rho $$-defined isochronous mass spectrometry and mass measurements of $$^{58}$$Ni fragmentsM. Zhang; X. Zhou; M. Wang; Y. H. Zhang; Yu. A. Litvinov; H. S. Xu; R. J. Chen; H. Y. Deng; C. Y. Fu; W. W. Ge; H. F. Li; T. Liao; S. A. Litvinov; P. Shuai; J. Y. Shi; R. S. Sidhu; Y. N. Song; M. Z. Sun; S. Suzuki; Q. Wang; Y. M. Xing; X. Xu; T. Yamaguchi; X. L. Yan; J. C. Yang; Y. J. Yuan; Q. Zeng; X. H. Zhou
The European Physical Journal A,
巻：59,
号：2, 2023年02月
Abstract
A novel isochronous mass spectrometry, termed as $$B\rho $$-defined IMS, has been established at the experimental cooler-storage ring CSRe in Lanzhou. Its potential has been studied through high precision mass measurements of $$^{58}$$Ni projectile fragments. Two time-of-flight detectors were installed in one of the straight sections of CSRe, thus enabling simultaneous measurements of the velocity and the revolution time of each stored short-lived ion. This allows for calculating the magnetic rigidity $$B\rho $$ and the orbit length C of each ion. The accurate $$B\rho (C)$$ function has been constructed, which is a universal calibration curve used to deduce the masses of the stored nuclides. The sensitivity to single stored ions, fast measurement time, and background-free characteristics of the method are ideally suited to address nuclides with very short lifetimes and smallest production yields. In the limiting case of just a single particle, the achieved mass resolving power allows one to determine its mass-over-charge ratio m/q with a remarkable precision of merely $$\sim 5$$ keV. Masses of $$T_z=-3/2$$fp-shell nuclides are re-determined with high accuracy, and the validity of the isospin multiplet mass equation is tested up to the heaviest isospin quartet with $$A=55$$. The new masses are also used to investigate the mirror symmetry of empirical residual proton-neutron interactions.
Springer Science and Business Media LLC, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epja/s10050-023-00928-6DOI ID：10.1140/epja/s10050-023-00928-6,
eISSN：1434-601X Charge-changing cross sections for Ca42–51 and effect of charged-particle evaporation induced by neutron-removal reactionsM. Tanaka; M. Takechi; A. Homma; A. Prochazka; M. Fukuda; D. Nishimura; T. Suzuki; T. Moriguchi; D. S. Ahn; A. Aimaganbetov; M. Amano; H. Arakawa; S. Bagchi; K.-H. Behr; N. Burtebayev; K. Chikaato; H. Du; T. Fujii; N. Fukuda; H. Geissel; T. Hori; S. Hoshino; R. Igosawa; A. Ikeda; N. Inabe; K. Inomata; K. Itahashi; T. Izumikawa; D. Kamioka; N. Kanda; I. Kato; I. Kenzhina; Z. Korkulu; Y. Kuk; K. Kusaka; K. Matsuta; M. Mihara; E. Miyata; D. Nagae; S. Nakamura; M. Nassurlla; K. Nishimuro; K. Nishizuka; K. Ohnishi; M. Ohtake; T. Ohtsubo; S. Omika; H. J. Ong; A. Ozawa; H. Sakurai; C. Scheidenberger; Y. Shimizu; T. Sugihara; T. Sumikama; H. Suzuki; S. Suzuki; H. Takeda; Y. Tanaka; Y. K. Tanaka; I. Tanihata; T. Wada; K. Wakayama; S. Yagi; T. Yamaguchi; R. Yanagihara; Y. Yanagisawa; K. Yoshida; T. K. Zholdybayev
Physical Review C,
巻：106,
号：1, 2022年07月
American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevc.106.014617DOI ID：10.1103/physrevc.106.014617,
ISSN：2469-9985,
eISSN：2469-9993 First Application of Mass Measurements with the Rare-RI Ring Reveals the Solar r-Process Abundance Trend at A=122 and A=123H.{\hspace; m } }F. Li; S. Naimi; T.{\hspace; m } }M. Sprouse; M.{\hspace; R. Mumpower; Y. Abe; Y. Yamaguchi; D. Nagae; F. Suzaki; M. Wakasugi; H. Arakawa; W.{\hspace; m } }B. Dou; D. Hamakawa; S. Hosoi; Y. Inada; D. Kajiki; T. Kobayashi; M. Sakaue; Y. Yokoda; T. Yamaguchi; R. Kagesawa; D. Kamioka; T. Moriguchi; M. Mukai; A. Ozawa; S. Ota; N. Kitamura; S. Masuoka; S. Michimasa; H. Baba; N. Fukuda; Y. Shimizu; H. Suzuki; H. Takeda; D.{\hspace; m } }S. Ahn; M. Wang; C.{\hspace; m } }Y. Fu; Q. Wang; S. Suzuki; Z. Ge; Yu.{\hspace; A. Litvinov; G. Lorusso; P.{\hspace; m } }M. Walker; Zs. Podolyak; T. Uesaka
Physical Review Letters,
巻：128,
号：15, 2022年04月
American Physical Society ({APS}), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.128.152701DOI ID：10.1103/physrevlett.128.152701,
ISSN：0031-9007,
ORCID：112358674 Precision measurement of the transition energy γt versus magnetic rigidity for storage-ring isochronous mass spectrometry M. Zhang; Y.H. Zhang; M. Wang; X. Zhou; Y.J. Yuan; X.L. Yan; Y.M. Xing; C.Y. Fu; R.J. Chen; X. Xu; P. Shuai; Q. Zeng; M.Z. Sun; H.F. Li; M. Si; Q. Wang; T. Bao; H.Y. Deng; M.Z. Liu; T. Liao; J.Y. Shi; Y.N. Song; H.Y. Jiao; X.H. Zhou; H.S. Xu; J.C. Yang; W.W. Ge; Yu.A. Litvinov; S.A. Litvinov; T. Yamaguchi; S. Suzuki
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：1027,
開始ページ：166329,
終了ページ：166329, 2022年03月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2022.166329DOI ID：10.1016/j.nima.2022.166329,
ISSN：0168-9002 Masses of exotic nuclei T. Yamaguchi; H. Koura; Yu.A. Litvinov; M. Wang
Progress in Particle and Nuclear Physics,
巻：120,
開始ページ：103882,
終了ページ：103882, 2021年09月,
［査読有り］,
［招待有り］,
［国際誌］Recent developments in precision mass spectrometry of radioactive isotopes (RI) and some selected related physics subjects are reviewed. In the last decades, besides conventional technologies in RI beam experiments, mass spectrometry of short-lived nuclei has significantly boosted its performance in terms of sensitivity and precision. Whereas single-path measurements are still employed for studies of the most rarely produced short-lived nuclides, though at a moderate precision level, modern methods are based on the storage of freshly produced exotic nuclei for a period of time. One of the biggest achievements in this direction so far is the Penning-trap mass spectrometry, where the highest mass accuracies of typically
are routinely obtained for radioactive nuclei. New precise mass values contribute to the developments of nuclear structure and nuclear astrophysics as well as are used for testing fundamental interactions and symmetries. Having the goal to study the most exotic short-lived nuclei in the vicinity of the neutron and proton drip lines, new highly efficient and fast techniques, such as multi-reflection time-of-flight spectrometers (MR-TOF) and mass spectrometry based on heavy-ion storage rings, are steadily gaining importance. Thanks to their fast measurement schemes both, MR-TOFs and storage rings, have successfully proven their high potential by accessing short-lived nuclei, where the mass accuracies down to
and even below were reported. Currently, the MR-TOF systems dedicated to mass measurements are in operation or in a planning phase at basically all RI beam facilities. The storage rings for radioactive beams are in use at three accelerator complexes, namely GSI in Darmstadt, Germany, IMP in Lanzhou, P. R. China, and RIKEN in Saitama, Japan. Although the progress of RI beam facilities was enormous in the last decades and new, more powerful facilities are expected to come in operation in the coming few years, some regions on the nuclidic chart will remain unaccessible for experiments. Therefore, the properties of such nuclides, in particular heavy neutron-rich nuclei, will have to be determined through theoretical calculations. It is an important quest to use the new precision masses for constraining and further developing of reliable nuclear theory. There are various models to describe atomic (nuclear) ground-state masses ranging from macroscopic approaches with microscopic corrections to ab-initio calculations based on nucleon–nucleon interactions. In this review article we focus on recent experimental challenges and findings as well as on the cutting-edge experimental technologies and mass formula theories.
Elsevier {BV}, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.ppnp.2021.103882DOI ID：10.1016/j.ppnp.2021.103882,
ISSN：0146-6410,
ORCID：98752419 In-ring velocity measurement for isochronous mass spectrometryX. Zhou; M. Zhang; M. Wang; Y. H. Zhang; Y. J. Yuan; X. L. Yan; X. H. Zhou; H. S. Xu; X. C. Chen; Y. M. Xing; R. J. Chen; X. Xu; P. Shuai; C. Y. Fu; Q. Zeng; M. Z. Sun; H. F. Li; Q. Wang; T. Bao; M. Si; H. Y. Deng; M. Z. Liu; T. Liao; J. Y. Shi; Y. N. Song; J. C. Yang; W. W. Ge; Yu. A. Litvinov; S. A. Litvinov; R. S. Sidhu; T. Yamaguchi; S. Omika; K. Wakayama; S. Suzuki; T. Moriguchi
Physical Review Accelerators and Beams,
巻：24,
号：4,
開始ページ：042802, 2021年04月,
［査読有り］American Physical Society (APS), 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevaccelbeams.24.042802DOI ID：10.1103/physrevaccelbeams.24.042802,
eISSN：2469-9888 Development and operation of an electrostatic time-of-flight detector for the Rare RI storage Ring D. Nagae; Y. Abe; S. Okada; S. Omika; K. Wakayama; S. Hosoi; S. Suzuki; T. Moriguchi; M. Amano; D. Kamioka; Z. Ge; S. Naimi; F. Suzaki; N. Tadano; R. Igosawa; K. Inomata; H. Arakawa; K. Nishimuro; T. Fujii; T. Mitsui; Y. Yanagisawa; H. Baba; S. Michimasa; S. Ota; G. Lorusso; Yu.A. Litvinov; A. Ozawa; T. Uesaka; T. Yamaguchi; Y. Yamaguchi; M. Wakasugi
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：986,
開始ページ：164713,
終了ページ：164713, 2021年01月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2020.164713DOI ID：10.1016/j.nima.2020.164713,
ISSN：0168-9002 Measurements of total reaction cross sections for 17Ne using a solid hydrogen target T. Moriguchi; M. Amano; A. Ozawa; W. Horiuchi; Y. Abe; T. Fujii; R. Kagesawa; D. Kamioka; A. Kitagawa; M. Mukai; D. Nagae; M. Sakaue; S. Sato; S. Suzuki; T. Suzuki; T. Yamaguchi; K. Yokota
Journal of Physics: Conference Series,
巻：1643,
号：1, 2020年12月
We measured the energy dependence of the total reaction cross sections (σR) for the proton-drip-line nucleus,17Ne, using a solid hydrogen target. We compared the experimental data with theoretical calculations using the Glauber model. We found that the theoretical cross sections overestimate the experimental ones in the low-energy region (∼100A MeV), whereas they significantly underestimate the experimental data in the intermediate-energy region (∼300-500A MeV). These trends are the same as those for σR for carbon-proton collisions, which were measured previously. We discuss several possibilities for resolving this discrepancy. This work demonstrates the necessity of additional careful investigations of the energy dependence of σR for various nuclei on proton targets in order to determine nuclear size properties precisely.
IOP Publishing Ltd, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1088/1742-6596/1643/1/012099DOI ID：10.1088/1742-6596/1643/1/012099,
ISSN：1742-6596,
SCOPUS ID：85098526156 Mass measurements for the Tz=-2 fp -shell nuclei Ti 40, Cr 44, Mn 46, Fe 48, Co 50, and Ni 52 C. Y. Fu; Y. H. Zhang; M. Wang; X. H. Zhou; Yu A. Litvinov; K. Blaum; H. S. Xu; X. Xu; P. Shuai; Y. H. Lam; R. J. Chen; X. L. Yan; X. C. Chen; J. J. He; S. Kubono; M. Z. Sun; X. L. Tu; Y. M. Xing; Q. Zeng; X. Zhou; W. L. Zhan; S. Litvinov; G. Audi; T. Uesaka; T. Yamaguchi; A. Ozawa; B. H. Sun; Y. Sun; F. R. Xu
Physical Review C,
巻：102,
号：5, 2020年11月
By using isochronous mass spectrometry at the experimental cooler storage ring in Lanzhou, China, masses of short-lived Cr44, Mn46, Fe48, Co50, and Ni52 were measured for the first time and the precision of the mass of Ti40 was improved by a factor of about 2. Relative precisions of δm/m=(1-2)×10-6 have been achieved. Details of the measurements and data analysis are given. The obtained masses are compared with the Atomic-Mass Evaluation 2016 and with theoretical model predictions. The new mass data enable us to extract the higher-order coefficients, d and e, of the quartic form of the isobaric multiplet mass equation for the fp-shell isospin quintets. Unexpectedly large d and e values for the A=44 quintet are found. By revisiting the previous experimental data on β-delayed protons from Cr44 decay, it is suggested that the observed anomaly could be due to the misidentification of the T=2, Jπ=0+ isobaric analog state in V44.
研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.102.054311Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85096107054&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85096107054&origin=inwardDOI ID：10.1103/PhysRevC.102.054311,
ISSN：2469-9985,
eISSN：2469-9993,
SCOPUS ID：85096107054 Vibrational and rotational cooling dynamics of the triatomic molecular ion N2O+stored in RICE R. Igosawa; A. Hirota; T. Yamaguchi; M. Lindley; K. Chartkunchand; Y. Nakano; S. Kuma; T. Azuma; T. Azuma
Journal of Physics: Conference Series,
巻：1412,
号：23, 2020年06月
Synopsis We studied radiative cooling dynamics of the triatomic molecular ion N2O+ stored in RICE. We observed the evolution of the populations at vibrational and rotational levels up to several 100 s by measuring neutral fragments from the laser-induced predissociation process. We found clear evidence of radiative cooling of the vibrational level populations with a time constant of several seconds. In contrast, absence of significant changes in the rotational levels revealed that the time scale of the rotational cooling is far longer, which is consistent to our simulation.
Institute of Physics Publishing, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1088/1742-6596/1412/23/232002DOI ID：10.1088/1742-6596/1412/23/232002,
ISSN：1742-6596,
SCOPUS ID：85087784083 Swelling of Doubly Magic Ca48 Core in Ca Isotopes beyond N=28 M. Tanaka; M. Takechi; A. Homma; M. Fukuda; D. Nishimura; T. Suzuki; Y. Tanaka; T. Moriguchi; D. S. Ahn; A. Aimaganbetov; M. Amano; H. Arakawa; S. Bagchi; K.-H. Behr; N. Burtebayev; K. Chikaato; H. Du; S. Ebata; T. Fujii; N. Fukuda; H. Geissel; T. Hori; W. Horiuchi; S. Hoshino; R. Igosawa; A. Ikeda; N. Inabe; K. Inomata; K. Itahashi; T. Izumikawa; D. Kamioka; N. Kanda; I. Kato; I. Kenzhina; Z. Korkulu; Y. Kuk; K. Kusaka; K. Matsuta; M. Mihara; E. Miyata; D. Nagae; S. Nakamura; M. Nassurlla; K. Nishimuro; K. Nishizuka; K. Ohnishi; M. Ohtake; T. Ohtsubo; S. Omika; H. J. Ong; A. Ozawa; A. Prochazka; H. Sakurai; C. Scheidenberger; Y. Shimizu; T. Sugihara; T. Sumikama; H. Suzuki; S. Suzuki; H. Takeda; Y. K. Tanaka; I. Tanihata; T. Wada; K. Wakayama; S. Yagi; T. Yamaguchi; R. Yanagihara; Y. Yanagisawa; K. Yoshida; T. K. Zholdybayev
Physical Review Letters,
巻：124,
号：10,
開始ページ：102501,
終了ページ：102501, 2020年03月,
［査読有り］,
［国際誌］Interaction cross sections for ^{42-51}Ca on a carbon target at 280 MeV/nucleon have been measured for the first time. The neutron number dependence of derived root-mean-square matter radii shows a significant increase beyond the neutron magic number N=28. Furthermore, this enhancement of matter radii is much larger than that of the previously measured charge radii, indicating a novel growth in neutron skin thickness. A simple examination based on the Fermi-type distribution, and mean field calculations point out that this anomalous enhancement of the nuclear size beyond N=28 results from an enlargement of the core by a sudden increase in the surface diffuseness of the neutron density distribution, which implies the swelling of the bare ^{48}Ca core in Ca isotopes beyond N=28.
American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.124.102501DOI ID：10.1103/physrevlett.124.102501,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280166,
PubMed ID：32216444 Energy dependence of total reaction cross sections for Ne-17 on a proton target T. Moriguchi; M. Amano; A. Ozawa; W. Horiuchi; Y. Abe; T. Fujii; R. Kagesawa; D. Kamioka; A. Kitagawa; M. Mukai; D. Nagae; M. Sakaue; S. Sato; S. Suzuki; T. Suzuki; T. Yamaguchi; K. Yokota
NUCLEAR PHYSICS A,
巻：994, 2020年02月,
［査読有り］We measured the energy dependence of the total reaction cross sections (sigma(R)) for the proton drip-line nucleus of neon isotopes, Ne-17, with a solid hydrogen target. The sigma(R) on a proton target in the low- and intermediate-energy regions were provided, where only a few values are available for unstable nuclei. The new data were compared with theoretical calculations using the Glauber model. In the low-energy region (similar to 100A MeV), the theoretical cross sections overestimate the experimental ones, whereas the theoretical ones significantly underestimate the experimental data in the intermediate energy region (similar to 300-500A MeV). We discuss several possibilities for solving this discrepancy. This work suggests the necessity of more careful investigations of the energy dependence of sigma(R) for various nuclei on a proton target to determine the nuclear size properties precisely. (C) 2019 Elsevier B.V. All rights reserved.
ELSEVIER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2019.121663DOI ID：10.1016/j.nuclphysa.2019.121663,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000510521100003 Development of a new in-ring beam monitor in the Rare-RI Ring S. Omika; T. Yamaguchi; N. Tadano; Y. Abe; M. Amano; Z. Ge; D. Kamioka; T. Moriguchi; D. Nagae; S. Naimi; A. Ozawa; F. Suzaki; S. Suzuki; T. Suzuki; T. Uesaka; M. Wakasugi; K. Wakayama; Y. Yamaguchi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,
巻：463,
号：463,
開始ページ：241,
終了ページ：243, 2020年01月,
［査読有り］A beam monitor is developed at the Rare-RI Ring storage ring facility at the RI beam factory at RIKEN. Because the Rare-RI Ring stores only a single exotic ion according to the operation principle, conventional beam instruments cannot be employed. In the present study, we design a simple monitoring system to confirm particle storage. The system comprises a thin foil and scintillators with photon sensors. When an ion passes through the foil, secondary electrons, including delta-rays, are emitted and are detected by a set of scintillation detectors without any guiding field. A beam test using Ge-78 with 175 MeV/nucleon successfully demonstrates the periodic revolution of the stored ions.
ELSEVIER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2019.05.029DOI ID：10.1016/j.nimb.2019.05.029,
ISSN：0168-583X,
eISSN：1872-9584,
Web of Science ID：WOS:000518699900045 Scheme of high-resolution identification and selection of secondary ions for mass measurements with the Rare-RI Ring Zhuang Ge; Tomohiro Uesaka; Sarah Naimi; Daisuke Nagae; Yasushi Abe; Syunichiro Omika; Fumi Suzaki; Takayuki Yamaguchi; Yoshitaka Yamaguchi; Masanori Wakusugi; Hongfu Li; Kiyoshi Wakayama; Hiroki Arakawa; Kumi Inomata; Kunimitsu Nishimuro; Takaaki Kobayashi; Akira Ozawa; Shun Hosoi; Yasuto Inada; Shinji Suzuki; Tetsuaki Moriguchi; Momo Mukai; Masamichi Amano; Daiki Kamioka; Yasushige Yano
Hyperfine Interactions,
巻：240,
号：1, 2019年12月,
［査読有り］© 2019, The Author(s). To achieve high-resolution selection and separation of mono-isotopic beams through projectile fragmentation or in-flight fission and to efficiently transport the secondary beams to the Rare-RI Ring (R3) for mass determination, the BigRIPS separator combined with the High-resolution Achromatic (HA) beam-line of SHARAQ is served as a two-stage separator. The first stage from F0 to F2 is used for separation of the nuclei of interest through a Bρ-ΔE-Bρ method and the second stage from F3 to S0 is employed for identification of the beam with a Bρ-ΔE-TOF method. With this scheme, all the secondary ions can be well separated on an event by event basis and be utilized for mass measurements by two complementary methods: the conventional magnetic-rigidity-time-of-flight (Bρ-TOF) method employing the BigRIPS-HA beam-line to measure exotic nuclides within 1 μ s and the newly established isochronous mass spectrometry (IMS) approach via the R3 with a measurement duration less than 1 ms. This report presents the technique advances of the BigRIPS-HA-SHARAQ-R3 as a separator/spectrometer and give a brief description of its application to the complementary TOF methods for mass measurements at RIBF.
研究論文（学術雑誌）
DOI：https://doi.org/10.1007/s10751-019-1599-2Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85070804484&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85070804484&origin=inwardDOI ID：10.1007/s10751-019-1599-2,
ISSN：0304-3843,
eISSN：1572-9540,
SCOPUS ID：85070804484 Masses of ground and isomeric states of in 101 and configuration-dependent shell evolution in odd- A indium isotopes X. Xu; J. H. Liu; C. X. Yuan; Y. M. Xing; M. Wang; Y. H. Zhang; X. H. Zhou; Yu. A. Litvinov; K. Blaum; R. J. Chen; X. C. Chen; C. Y. Fu; B. S. Gao; J. J. He; S. Kubono; Y. H. Lam; H. F. Li; M. L. Liu; X. W. Ma; P. Shuai; M. Si; M. Z. Sun; X. L. Tu; Q. Wang; H. S. Xu; X. L. Yan; J. C. Yang; Y. J. Yuan; Q. Zeng; P. Zhang; X. Zhou; W. L. Zhan; S. Litvinov; G. Audi; S. Naimi; T. Uesaka; Y. Yamaguchi; T. Yamaguchi; A. Ozawa; B. H. Sun; K. Kaneko; Y. Sun; F. R. Xu
Physical Review C,
巻：100,
号：5, 2019年11月
We report first precision mass measurements of the 1/2- isomeric and 9/2+ ground states of In101. The determined isomeric excitation energy continues a smooth trend of odd-A indium isotopes up to the immediate vicinity of N=50 magic number. This trend can be confirmed by dedicated shell-model calculations only if the neutron configuration mixing is considered. We find that the single-particle energies are different for different states of the same isotope. The presented configuration-dependent shell evolution, type-II shell evolution, in odd-A nuclei is discussed for the first time. Our results will facilitate future studies of single-particle neutron states.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.100.051303DOI ID：10.1103/PhysRevC.100.051303,
ISSN：2469-9993,
SCOPUS ID：85076592520 New test of modulated electron capture decay of hydrogen-like 142Pm ions: Precision measurement of purely exponential decay F.C. Ozturk; B. Akkus; D. Atanasov; H. Beyer; F. Bosch; D. Boutin; C. Brandau; P. Bühler; R.B. Cakirli; R.J. Chen; W.D. Chen; X.C. Chen; I. Dillmann; C. Dimopoulou; W. Enders; H.G. Essel; T. Faestermann; O. Forstner; B.S. Gao; H. Geissel; R. Gernhäuser; R.E. Grisenti; A. Gumberidze; S. Hagmann; T. Heftrich; M. Heil; M.O. Herdrich; P.-M. Hillenbrand; T. Izumikawa; P. Kienle; C. Klaushofer; C. Kleffner; C. Kozhuharov; R.K. Knöbel; O. Kovalenko; S. Kreim; T. Kühl; C. Lederer-Woods; M. Lestinsky; S.A. Litvinov; Yu.A. Litvinov; Z. Liu; X.W. Ma; L. Maier; B. Mei; H. Miura; I. Mukha; A. Najafi; D. Nagae; T. Nishimura; C. Nociforo; F. Nolden; T. Ohtsubo; Y. Oktem; S. Omika; A. Ozawa; N. Petridis; J. Piotrowski; R. Reifarth; J. Rossbach; R. Sánchez; M.S. Sanjari; C. Scheidenberger; R.S. Sidhu; H. Simon; U. Spillmann; M. Steck; Th. Stöhlker; B.H. Sun; L.A. Susam; F. Suzaki; T. Suzuki; S.Yu. Torilov; C. Trageser; M. Trassinelli; S. Trotsenko; X.L. Tu; P.M. Walker; M. Wang; G. Weber; H. Weick; N. Winckler; D.F.A. Winters; P.J. Woods; T. Yamaguchi; X.D. Xu; X.L. Yan; J.C. Yang; Y.J. Yuan; Y.H. Zhang; X.H. Zhou
Physics Letters B,
巻：797,
開始ページ：134800,
終了ページ：134800, 2019年10月,
［査読有り］An experiment addressing electron capture (EC) decay of hydrogen-like Pm-142(60+) ions has been conducted at the experimental storage ring (ESR) at GSI. The decay appears to be purely exponential and no modulations were observed. Decay times for about 9000 individual EC decays have been measured by applying the single-ion decay spectroscopy method. Both visually and automatically analysed data can be described by a single exponential decay with decay constants of 0.0126(7) s(-1) for automatic analysis and 0.0141(7) s(-1) for manual analysis. If a modulation superimposed on the exponential decay curve is assumed, the best fit gives a modulation amplitude of merely 0.019(15), which is compatible with zero and by 4.9 standard deviations smaller than in the original observation which had an amplitude of 0.23(4). (C) 2019 The Author(s). Published by Elsevier B.V.
Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2019.134800DOI ID：10.1016/j.physletb.2019.134800,
ISSN：0370-2693,
eISSN：1873-2445,
Web of Science ID：WOS:000488071200018 Development of prototype RICH detector with multi-anode photomultipliers for radioactive ions M. Machida; D. Nishimura; M. Fukuda; S. Yagi; T. Sugihara; S. Kanbe; S. Yamaoka; M. Takechi; M. Tanaka; M. Amano; J. Chiba; K. Chikaato; H. Du; S. Fukuda; A. Homma; T. Hori; A. Ikeda; R. Ishii; T. Izumikawa; Y. Kamisho; N. Kanda; R. Kehl; A. Kitagawa; K. Matsuta; M. Mihara; E. Miyata; A. Mizukami; T. Moriguchi; M. Nagashima; S. Nakamura; M. Nassurlla; K. Ohnishi; T. Ohtsubo; S. Sato; J. Shimaya; T. Suzuki; S. Suzuki; T. Tahara; Y. Tanaka; T. Yamaguchi; R. Yanagihara
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：931,
開始ページ：23,
終了ページ：28, 2019年07月,
［査読有り］© 2019 Elsevier B.V. RI-RICH, a ring-imaging Cherenkov counter for radioactive ions, has been developed to measure the velocity of the ions at intermediate energies. Our RI-RICH system consists of six multi-anode photomultiplier tubes covered with 360-nm bandpass filters and a radiator made of quartz or BK7. For the primary 132 Xe beam with a velocity of β=0.712, a velocity resolution of Δβ∕β=4.9×10 −4 (one standard deviation σ) and a detection efficiency of more than 99.99% were achieved. For the secondary beams with Z=44–55 and β≃0.70, we successfully performed particle identification using the Bρ-ΔE-β method. The velocity resolutions of RI-RICH for these nuclides were equivalent to a more than 6σ separation for the mass number.
研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2019.03.085Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85064093152&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85064093152&origin=inwardDOI ID：10.1016/j.nima.2019.03.085,
ISSN：0168-9002,
SCOPUS ID：85064093152 Masses of neutron-rich Sc 52-54 and Ti 54,56 nuclides: The N=32 subshell closure in scandium X. Xu; M. Wang; K. Blaum; J. D. Holt; Yu A. Litvinov; A. Schwenk; J. Simonis; S. R. Stroberg; Y. H. Zhang; H. S. Xu; P. Shuai; X. L. Tu; X. H. Zhou; F. R. Xu; G. Audi; R. J. Chen; X. C. Chen; C. Y. Fu; Z. Ge; W. J. Huang; S. Litvinov; D. W. Liu; Y. H. Lam; X. W. Ma; R. S. Mao; A. Ozawa; B. H. Sun; Y. Sun; T. Uesaka; G. Q. Xiao; Y. M. Xing; T. Yamaguchi; Y. Yamaguchi; X. L. Yan; Q. Zeng; H. W. Zhao; T. C. Zhao; W. Zhang; W. L. Zhan
Physical Review C,
巻：99,
号：6, 2019年06月
Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the neutron-rich Sc52-54 and Ti54,56 nuclei. The new mass excess values ME(Sc52)=-40525(65) keV, ME(Sc53)=-38910(80) keV, and ME(Sc54)=-34485(360) keV, deviate from the Atomic Mass Evaluation 2012 by 2.3σ, 2.8σ, and 1.7σ, respectively. These large deviations significantly change the systematics of the two-neutron separation energies of scandium isotopes. The empirical shell gap extracted from our new experimental results shows a significant subshell closure at N=32 in scandium, with a similar magnitude as in calcium. Moreover, we present ab initio calculations using the valence-space in-medium similarity renormalization group based on two- and three-nucleon interactions from chiral effective field theory. The theoretical results confirm the existence of a substantial N=32 shell gap in Sc and Ca with a decreasing trend towards lighter isotones, thus providing a consistent picture of the evolution of the N=32 magic number from the pf into the sd shell.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.99.064303DOI ID：10.1103/PhysRevC.99.064303,
ISSN：2469-9993,
SCOPUS ID：85067355203 Masses of the Tz=-3/2 nuclei P 27 and S 29 C. Y. Fu; Y. H. Zhang; X. H. Zhou; M. Wang; Yu. A. Litvinov; K. Blaum; H. S. Xu; X. Xu; P. Shuai; Y. H. Lam; R. J. Chen; X. L. Yan; T. Bao; X. C. Chen; H. Chen; J. J. He; S. Kubono; D. W. Liu; R. S. Mao; X. W. Ma; M. Z. Sun; X. L. Tu; Y. M. Xing; P. Zhang; Q. Zeng; X. Zhou; W. L. Zhan; S. Litvinov; G. Audi; T. Uesaka; Y. Yamaguchi; T. Yamaguchi; A. Ozawa; B. H. Sun; Y. Sun; F. R. Xu
Physical Review C,
巻：98,
号：1, 2018年07月
Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the Tz=-3/2 nuclei P27 and S29. The new mass excess value ME(S29)=-3094(13)keV is 66(52) keV larger than the result of the previous S32(He3,He6)S29 reaction measurement in 1973 and a factor of 3.8 more precise. The new result for S29 together with those of the T=3/2 isobaric analog states in P29, Si29, and Al29 fit well into the quadratic form of the isobaric multiplet mass equation (IMME). The mass excess of P27 has been remeasured to be ME(P27)=-685(42)keV. By analyzing the linear and quadratic coefficients of the IMME in the Tz=-3/2 sd-shell nuclei, it was found that the ratio of the Coulomb radius parameters is R≈0.96 and is nearly the same for all T=3/2 isospin multiplets. Such a nearly constant R value, apparently valid for the entire light mass region with A>
9, can be used to set stringent constraints on the isovector and isotensor components of the isospin nonconserving forces in theoretical calculations.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.98.014315DOI ID：10.1103/PhysRevC.98.014315,
ISSN：2469-9993,
SCOPUS ID：85050075849 Isochronous mass measurements of T-z =-1 f p-shell nuclei from projectile fragmentation of Ni-58 Zhang, Y. H; Zhang, P; Zhou, X. H; Wang, M; Litvinov, Yu A; Xu, H. S; Xu, X; Shuai, P; Lam, Y. H; Chen, R. J; Yan, X. L; Bao, T; Chen, X. C; Chen, H; Fu, C. Y; He, J. J; Kubono, S; Liu, D. W; Mao, R. S; Ma, W; Sun, M. Z; Tu, X. L; Xing, Y. M; Zeng, Q; Zhou, X; Zhan, W. L; Litvinov, S; Blaum, K; Audi, G; Uesaka, T; Yamaguchi, Y; Yamaguchi, T; Ozawa, A; Sun, B. H; Sun, Y; Xu, F. R
PHYSICAL REVIEW C,
巻：98,
号：1, 2018年07月,
［査読有り］AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.98.014319DOI ID：10.1103/PhysRevC.98.014319,
ISSN：2469-9985 Mass measurements of neutron-deficient Y, Zr, and Nb isotopes and their impact on rp and νp nucleosynthesis processes Y.M. Xing; K.A. Li; Y.H. Zhang; X.H. Zhou; M. Wang; Yu.A. Litvinov; K. Blaum; S. Wanajo; S. Kubono; G. Martínez-Pinedo; A. Sieverding; R.J. Chen; P. Shuai; C.Y. Fu; X.L. Yan; W.J. Huang; X. Xu; X.D. Tang; H.S. Xu; T. Bao; X.C. Chen; B.S. Gao; J.J. He; Y.H. Lam; H.F. Li; J.H. Liu; X.W. Ma; R.S. Mao; M. Si; M.Z. Sun; X.L. Tu; Q. Wang; J.C. Yang; Y.J. Yuan; Q. Zeng; P. Zhang; X. Zhou; W.L. Zhan; S. Litvinov; G. Audi; T. Uesaka; Y. Yamaguchi; T. Yamaguchi; A. Ozawa; C. Fröhlich; T. Rauscher; F.-K. Thielemann; B.H. Sun; Y. Sun; A.C. Dai; F.R. Xu
Physics Letters B,
巻：781,
開始ページ：358,
終了ページ：363, 2018年06月,
［査読有り］Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2018.04.009DOI ID：10.1016/j.physletb.2018.04.009,
ISSN：0370-2693 Determination of Fusion Barrier Distributions from Quasielastic Scattering Cross Sections towards Superheavy Nuclei Synthesis Taiki Tanaka; Yoshihiro Narikiyo; Kosuke Morita; Kunihiro Fujita; Daiya Kaji; Kouji Morimoto; Sayaka Yamaki; Yasuo Wakabayashi; Kengo Tanaka; Mirei Takeyama; Akira Yoneda; Hiromitsu Haba; Yukiko Komori; Shinya Yanou; Benoît Jean-Paul Gall; Zouhair Asfari; Hugo Faure; Hiroo Hasebe; Minghui Huang; Jumpei Kanaya; Masashi Murakami; Atsushi Yoshida; Takayuki Yamaguchi; Fuyuki Tokanai; Tomomi Yoshida; Shoya Yamamoto; Yuki Yamano; Kenyu Watanabe; Satoshi Ishizawa; Masato Asai; Ryuji Aono; Shin-ichi Goto; Kenji Katori; Kouichi Hagino
Journal of the Physical Society of Japan,
巻：87,
号：1,
開始ページ：014201,
終了ページ：014201, 2018年01月,
［査読有り］In order to study the nucleus-nucleus interactions for syntheses of superheavy nuclei, we measured excitation functions for the quasielastic scattering of Ca-48+Pb-208, Ti-50+Pb-208, and Ca-48+Cm-248 using the gas-filled-type recoil ion separator GARIS. The quasielastic scattering events were clearly separated from deep-inelastic events by using GARIS and its focal plan detectors, except for high-incident-energy points. The quasielastic barrier distributions were successfully extracted for these systems, and compared with coupled-channels calculations. The results of the calculations indicate that vibrational and rotational excitations of the colliding nuclei, as well as neutron transfers before contact, strongly affect the structure of the barrier distribution. For the reactions of Ca-48+Pb-208 and Ti-50+Pb-208, a local maximum of the barrier distribution occurred at the same energy as the peak of the 2n evaporation cross section of the system. On the other hand, for the hot fusion reaction of Ca-48+Cm-248, the 4n evaporation cross section of the system peaks at energies well above the maximum of the barrier distribution. This may be attributed to the deformation of the target nucleus. We argue that these findings can be utilized to locate the optimal energy for future searches for undiscovered superheavy nuclei.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.7566/jpsj.87.014201DOI ID：10.7566/jpsj.87.014201,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000417949100011 Nuclear-matter radius studies from Ni-58(alpha,alpha) experiments at the GSI Experimental Storage Ring with the EXL facility J. C. Zamora; T. Aumann; S. Bagchi; S. Boenig; M. Csatlos; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhaeuser; M. N. Harakeh; A. -L. Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; Th. Kroell; M. Kuilman; S. Litvinov; Yu. A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. von Schmid; M. Steck; B. Streicher; L. Stuhl; M. Thuerauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. Zenihiro
PHYSICAL REVIEW C,
巻：96,
号：3, 2017年09月,
［査読有り］A novel method for measuring nuclear reactions in inverse kinematics with stored ion beams was successfully used to extract the nuclear-matter radius of Ni-58. The experiment was performed at the experimental heavy-ion storage ring at the GSI facility using a stored Ni-58 beam at energies of 100 and 150 MeV/u and an internal helium gas-jet target. Elastically scattered a-recoils at low momentum transfers were measured with an in-ring detector system compatible with ultrahigh vacuum. Experimental angular distributions were fitted using density-dependent optical model potentials within the eikonal approximation. This permitted the extraction of the point-matter root-mean-square radius of Ni-58 with an average value of 3.70(7) fm. Results from this work are in good agreement with several experiments performed in the past in normal kinematics. This pioneering experiment demonstrates a major breakthrough towards future investigations with far-from-stability stored beams using the present technique.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.96.034617DOI ID：10.1103/PhysRevC.96.034617,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000411455500003 Investigations of charge-changing processes for light proton-rich nuclei on carbon and solid-hydrogen targets K. Sawahata; A. Ozawa; Y. Saito; Y. Abe; Y. Ichikawa; N. Inaba; Y. Ishibashi; A. Kitagawa; S. Matsunaga; T. Moriguchi; D. Nagae; S. Okada; S. Sato; S. Suzuki; T. Suzuki; Y. Takeuchi; T. Yamaguchi; J. Zenihiro
NUCLEAR PHYSICS A,
巻：961,
開始ページ：142,
終了ページ：153, 2017年05月,
［査読有り］We investigated charge-changing processes (total charge-changing cross sections and partial charge changing cross sections) for light proton-rich nuclei (Ar34-36, Cl-33, Si25-28) at around 300A MeV on carbon and solid-hydrogen targets. We estimated the nuclear proton point radii of Cl-33 and Si-25,Si-26,Si-27 from the observed total charge-changing cross sections by using Glauber-model calculations with a phenomenological correction factor. Furthermore, we estimated the proton skin thickness for Cl-33 coupled with its previously observed matter radius. From investigations of the partial charge-changing cross sections, clear zigzag pattern was observed for all isotopes. The present studies suggest that the pattern may be common in the proton-rich side, and depends on the odd even nature of the fragment charge. (C) 2017 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2017.02.012DOI ID：10.1016/j.nuclphysa.2017.02.012,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000400534600007 High-precision QEC values of superallowed 0+ → 0+β-emitters 46Cr, 50Fe and 54Ni Zhang P.; Xu X.; Shuai P.; Chen R.J.; Yan X.L.; Zhang Y.H.; Wang M.; Litvinov Yu.A.; Blaum K.; Xu H.S.; Bao T.; Chen X.C.; Chen H.; Fu C.Y.; He J.J.; Kubono S.; Lam Y.H.; Liu D.W.; Mao R.S.; Ma X.W.; Sun M.Z.; Tu X.L.; Xing Y.M.; Yang J.C.; Yuan Y.J.; Zeng Q.; Zhou X.; Zhou X.H.; Zhan W.L.; Litvinov S.; Audi G.; Uesaka T.; Yamaguchi Y.; Yamaguchi T.; Ozawa A.; Sun B.H.; Sun Y.; Xu F.R.
Physics letters. B,
巻：767,
開始ページ：20,
終了ページ：24, 2017年04月,
［査読有り］Short-lived 46Cr, 50Fe and 54Ni were studied by isochronous mass spectrometry at the HIRFL-CSR facility in Lanzhou. The measured precision mass excesses (ME) of 46Cr, 50Fe and 54Ni are −29471(11) keV, −34477(6) keV and −39278(4) keV, respectively. The superallowed 0+→0+β-decay Q values were derived to be QEC(46Cr) = 7604(11) keV, QEC(50Fe) = 8150(6) keV and QEC(54Ni) = 8731(4) keV. The values for 50Fe and 54Ni are by one order of magnitude more precise than the adopted literature values. By combining the existing half-lives and branching ratios, we obtained the corrected Ft values to be Ft(50Fe) = 3103(70)s and Ft(54Ni) = 3076(50)s. The main contribution to the Ft uncertainties is now due to β-decay branching ratios, still, more high-precision measurements of the half-lives, the masses, and especially the branching ratios are needed in order to satisfy the requirements for a stringent CVC test.
Elsevier B.V., 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2017.01.039DOI ID：10.1016/j.physletb.2017.01.039,
ISSN：0370-2693,
CiNii Articles ID：120006224082,
CiNii Books ID：AA00774026 Study of the Reaction 48Ca +248Cm →296Lv*at RIKEN-GARIS Daiya Kaji; Kosuke Morita; Kouji Morimoto; Hiromitsu Haba; Masato Asai; Kunihiro Fujita; Zaiguo Gan; Hans Geissel; Hiroo Hasebe; Sigurd Hofmann; MingHui Huang; Yukiko Komori; Long Ma; Joachim Maurer; Masashi Murakami; Mirei Takeyama; Fuyuki Tokanai; Taiki Tanaka; Yasuo Wakabayashi; Takayuki Yamaguchi; Sayaka Yamaki; Atsushi Yoshida
Journal of the Physical Society of Japan,
巻：86,
号：3,
開始ページ：034201,
終了ページ：034201, 2017年03月,
［査読有り］The fusion reaction Ca-48 + Cm-248 -> (296)Lv* was investigated using the gas-filled recoil ion separator GARIS at RIKEN. The reaction was studied at excitation energies of 41.3 and 38.2 MeV. A total of seven decay chains were observed. Three of the chains were assigned to the decay of (292)Lv and three to the decay of (293)Lv. A possible observation of an a-decay branch of (284)Cn populating the new spontaneously fissioning nucleus (280)Ds is discussed. The assignment of one of the decay chains to the 3n evaporation channel, resulting in a spontaneous fission branch of (285)Cn, or to the 2n channel, resulting in the population of the new fissioning nucleus (286)Cn, is ambiguous. Measured cross sections are in agreement with previously published values.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.7566/jpsj.86.034201DOI ID：10.7566/jpsj.86.034201,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000395530400010 NUCLEAR STRUCTURE OF C-15,C-16 VIA REACTION CROSS-SECTION MEASUREMENTS H. Du; M. Fukuda; D. Nishimura; M. Takechi; T. Suzuki; Y. Tanaka; I. Kato; M. Tanaka; K. Abe; T. Izumikawa; H. Oikawa; T. Ohtsubo; J. Ohno; Y. Kanke; H. Kikuchi; A. Kitagawa; S. Sato; U. Sayama; J. Shimaya; S. Suzuki; Y. Takeuchi; T. Takemoto; N. Tadano; R. Tamura; J. Nagumo; K. Nishizuka; S. Fukuda; K. Hori; S. Matsunaga; A. Mizukami; M. Mihara; E. Miyata; D. Murooka; S. Yamaoka; T. Yamaguchi
ACTA PHYSICA POLONICA B,
巻：48,
号：3,
開始ページ：473,
終了ページ：479, 2017年03月,
［査読有り］Reaction cross sections for C-15.16 on nuclear targets (Be, C, Al) and proton target are systematically measured in the intermediate energy range. Nucleon density distributions of C-15,C-16 were deduced from the analyses of present data with existing experimental data using the Glauber-type calculation. Proton and neutron density distributions were also deduced separately from proton target data. Results of root-mean-square radii show a good agreement with theoretical calculations for both isotopes.
JAGIELLONIAN UNIV PRESS, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.5506/APhysPolB.48.473DOI ID：10.5506/APhysPolB.48.473,
ISSN：0587-4254,
eISSN：1509-5770,
SCOPUS ID：85017150383,
Web of Science ID：WOS:000398717500035 REACTION CROSS SECTIONS FOR B13-15 AND ONE-NEUTRON HALO IN B-14 M. Tanaka; M. Fukuda; D. Nishimura; M. Takechi; S. Suzuki; H. Du; Y. Tanaka; K. Aoki; S. Fukuda; A. Honma; T. Izumikawa; Y. Kamisho; N. Kanda; I. Kato; Y. Kanke; A. Kitagawa; J. Kohno; M. Machida; K. Matsuta; M. Mihara; E. Miyata; Y. Morita; J. Muraoka; D. Murooka; T. Nagai; M. Nagashima; K. Ohnishi; J. Ohno; T. Ohtsubo; H. Oikawa; S. Sato; H. Shimamura; T. Sugihara; T. Suzuki; N. Tadano; R. Takagaki; Y. Takei; A. Takenouchi; S. Yagi; T. Yamaguchi; S. Yamaki; S. Yamaoka
ACTA PHYSICA POLONICA B,
巻：48,
号：3,
開始ページ：461,
終了ページ：466, 2017年03月,
［査読有り］We have measured reaction cross sections (sigma(R)) for B-13,B-14,B-15 on Be, C, Al, and proton targets. In addition to the conventional method of deducing nucleon density distributions based on the Glauber-type calculation, the recently developed method for deducing point- proton and neutron density distributions separately from sigma(R) on proton targets were utilized for these nuclei. The result suggests the necessity for B-14 of a large tail in its neutron density distribution, which can be referred to as a one-neutron halo. Root-mean-square point- proton, neutron and matter radii for B-13,B-14,B-15 were also derived. From present systematic studies for B-13,B-14,B-15, a large enhancement of matter and neutron radii in B-14 was found for the first time.
JAGIELLONIAN UNIV PRESS, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.5506/APhysPolB.48.461DOI ID：10.5506/APhysPolB.48.461,
ISSN：0587-4254,
eISSN：1509-5770,
SCOPUS ID：85017154784,
Web of Science ID：WOS:000398717500033 Measurements of Interaction Cross Sections for 19–27F IsotopesAkira Homma; Maya Takechi; Takashi Ohtsubo; Daiki Nishimura; Mitsunori Fukuda; Takeshi Suzuki; Takayuki Yamaguchi; Takamasa Kuboki; Akira Ozawa; Sinji Suzuki; Hiroto Ooishi; Tetsuaki Moriguchi; Takashi Sumikawa; H. Geissel; Nori Aoi; Rui-jiu Chen; De-Qing Fang; Naoki Fukuda; Shota Fukuoka; Hisahiro Furuki; Naruki Inaba; Nobuyuki Ishibashi; Takeshi Ito; Takuji Izumikawa; Daisuke Kameda; Toshiyuki Kubo; M. Lantz; C. S. Lee; Yu-Gang Ma; Mototsugu Mihara; Satao Momota; Daisuke Nagae; Ryo Nishikiori; Takahiro Niwa; Tetsuya Ohnishi; Kimitake Okumura; Toshiyuki Ogura; Masayuki Nagashima; Hiroyoshi Sakurai; Kanae Sato; Yoshiriro Shimbara; Hiroshi Suzuki; Hiroyuki Takeda; Satoshi Takeuchi; Kenji Tanaka; Hideaki Uenishi; M. Winkler; Yoshiyuki Yanagisawa
JPS Conf. Proc. 14, Proceedings of the 14th International Symposium on Nuclei in the Cosmos (NIC2016),
巻：14,
開始ページ：021010-1,
終了ページ：021010-3, 2017年02月,
［査読有り］Journal of the Physical Society of Japan, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.7566/jpscp.14.021010DOI ID：10.7566/jpscp.14.021010 First measurement of isoscalar giant resonances in a stored-beam experiment Zamora J.C.; Aumann T.; Bagchi S.; Bönig S.; Csatlós M.; Dillmann I.; Dimopoulou C.; Egelhof P.; Eremin V.; Furuno T.; Geissel H.; Gernhäuser R.; Harakeh M.N.; Hartig A.-L.; Ilieva S.; Kalantar-Nayestanaki N.; Kiselev O.; Kollmus H.; Kozhuharov C.; Krasznahorkay A.; Kröll Th.; Kuilman M.; Litvinov S.; Litvinov Yu.A.; Mahjour-Shafiei M.; Mutterer M.; Nagae D.; Najafi M.A.; Nociforo C.; Nolden F.; Popp U.; Rigollet C.; Roy S.; Scheidenberger C.; von Schmid M.; Steck M.; Streicher B.; Stuhl L.; Thürauf M.; Uesaka T.; Weick H.; Winfield J.S.; Winters D.; Woods P.J.; Yamaguchi T.; Yue K.; Zenihiro J.
Physics Letters B,
巻：763,
開始ページ：16,
終了ページ：19, 2016年12月,
［査読有り］Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2016.10.015DOI ID：10.1016/j.physletb.2016.10.015,
ISSN：0370-2693,
CiNii Articles ID：120006325127 Identification of the Lowest T=2, Jπ=0+ Isobaric Analog State in Co52 and Its Impact on the Understanding of β-Decay Properties of Ni52 Xu X.; Zhang P.; Shuai P.; Chen R. J.; Yan X. L.; Zhang Y. H.; Wang M.; Litvinov Yu. A.; Xu H. S.; Bao T.; Chen X. C.; Chen H.; Fu C. Y.; Kubono S.; Lam Y. H.; Liu D. W.; Mao R. S.; Ma X. W.; Sun M. Z.; Tu X. L.; Xing Y. M.; Yang J. C.; Yuan Y. J.; Zeng Q.; Zhou X.; Zhou X. H.; Zhan W. L.; Litvinov S.; Blaum K.; Audi G.; Uesaka T.; Yamaguchi Y.; Yamaguchi T.; Ozawa A.; Sun B. H.; Sun Y.; Dai A. C.; Xu F. R.
Physical review letters,
巻：117,
号：18,
開始ページ：182503,
終了ページ：182503, 2016年10月,
［査読有り］Masses of 52g,52mCo were measured for the first time with an accuracy of ∼10 keV, an unprecedented precision reached for short-lived nuclei in the isochronous mass spectrometry. Combining our results with the previous β−γ measurements of 52Ni, the T=2, Jπ=0+ isobaric analog state (IAS) in 52Co was newly assigned, questioning the conventional identification of IASs from the β-delayed proton emissions. Using our energy of the IAS in 52Co, the masses of the T=2 multiplet fit well into the isobaric multiplet mass equation. We find that the IAS in 52Co decays predominantly via γ transitions while the proton emission is negligibly small. According to our large-scale shell model calculations, this phenomenon has been interpreted to be due to very low isospin mixing in the IAS.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.117.182503DOI ID：10.1103/physrevlett.117.182503,
ISSN：0031-9007,
eISSN：1079-7114,
CiNii Articles ID：120006352544,
CiNii Books ID：AA00773679,
ORCID：80280180 Reaching time resolution of less than 10 ps with plastic scintillation detectors J. W. Zhao; B. H. Sun; I. Tanihata; S. Terashima; L. H. Zhu; A. Enomoto; D. Nagae; T. Nishimura; S. Omika; A. Ozawa; Y. Takeuchi; T. Yamaguchi
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
巻：823,
開始ページ：41,
終了ページ：46, 2016年07月
Timing-pick up detectors with excellent timing resolutions are essential in many modern nuclear physics experiments. Aiming to develop a Time-Of-Flight system with precision down to about 10 ps, we have made a systematic study of the timing characteristic of TOF detectors, which consist of several combinations of plastic scintillators and photomultiplier tubes. With the conventional electronics, the best timing resolution of about 5.1 ps (σ) has been achieved for detectors with an area size of 3 × 1 cm2. It is found that for data digitalization a combination of TAC and ADC can achieve a better time resolution than the currently available TDC. Simultaneous measurements of both time and pulse height are very valuable for the correction of time-walk effect.
Elsevier B.V., 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2016.03.106DOI ID：10.1016/j.nima.2016.03.106,
ISSN：0168-9002,
SCOPUS ID：84962671260 New results from isochronous mass measurements of neutron-rich uranium fission fragments with the FRS-ESR-facility at GSI R. Knoebel; M. Diwisch; H. Geissel; Yu. A. Litvinov; Z. Patyk; W. R. Plass; C. Scheidenberger; B. Sun; H. Weick; F. Bosch; D. Boutin; L. Chen; C. Dimopoulou; A. Dolinskii; B. Franczak; B. Franzke; M. Hausmann; C. Kozhuharov; J. Kurcewicz; S. A. Litvinov; M. Matos; M. Mazzocco; G. Muenzenberg; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; J. Stadlmann; M. Steck; T. Suzuki; P. M. Walker; M. Winkler; T. Yamaguchi
EUROPEAN PHYSICAL JOURNAL A,
巻：52,
号：5, 2016年05月,
［査読有り］Masses of uranium fission fragments have been measured with the FRagment Separator (FRS) combined with the Experimental Storage Ring (ESR) at GSI. A 410-415MeV/u U-238 projectile beam was fast extracted from the synchrotron SIS-18 with an average intensity of 10(9)/spill. The projectiles were focused on a 1 g/cm(2) beryllium target at the entrance of the FRS to create neutron-rich isotopes via abrasion-fission. The fission fragments were spatially separated with the FRS and injected into the isochronous storage ring ESR for fast mass measurements without applying cooling. The Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B.-tagging at the high-resolution dispersive central focal plane of the FRS. The evaluation has been done for the combined data sets from both experiments with a new method of data analysis. The use of a correlation matrix has provided experimental mass values for 23 different neutron-rich isotopes for the first time and 6 masses with improved values. The new masses were obtained for nuclides in the element range from Se to Ce. The applied analysis has given access even to rare isotopes detected with an intensity of a few atoms per week. The novel data analysis and systematic error determination are described and the results are compared with extrapolations of experimental values and theoretical models.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epja/i2016-16138-6DOI ID：10.1140/epja/i2016-16138-6,
ISSN：1434-6001,
eISSN：1434-601X,
Web of Science ID：WOS:000376407600004 First direct mass measurements of stored neutron-rich 129,130,131 Cd isotopes with FRS-ESR R. Knöbel; M. Diwisch; F. Bosch; D. Boutin; L. Chen; C. Dimopoulou; A. Dolinskii; B. Franczak; B. Franzke; H. Geissel; M. Hausmann; C. Kozhuharov; J. Kurcewicz; S.A. Litvinov; G. Martinez-Pinedo; M. Matoš; M. Mazzocco; G. Münzenberg; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W.R. Plaß; C. Scheidenberger; J. Stadlmann; M. Steck; B. Sun; T. Suzuki; P.M. Walker; H. Weick; M.-R. Wu; M. Winkler; T. Yamaguchi
Physics Letters B,
巻：754,
開始ページ：288,
終了ページ：293, 2016年03月,
［査読有り］A 410 MeV/u U-238 projectile beam was used to create cadmium isotopes via abrasion-fission in a beryllium target placed at the entrance of the in-flight separator FRS at GSI. The fission fragments were separated by the FRS and injected into the isochronous storage ring ESR for mass measurements. Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B rho-tagging at the high-resolution central focal plane of the FRS. In the experiment with B rho-tagging the magnetic rigidity of the injected fragments was determined with an accuracy of 2 . 10(-4). A new method of data analysis, which uses a correlation matrix for the combined data set from both experiments, has provided experimental mass values of 25 rare isotopes for the first time. The high sensitivity and selectivity of the method have given access to nuclides detected with a rate of a few atoms per week. In this letter we present for the Cd-129,Cd-130,Cd-131 isotopes mass values directly measured for the first time. The experimental mass values of cadmium as well as for tellurium and tin isotopes show a pronounced shell effect towards and at N=82. Shell quenching cannot be deduced from a single new mass value, nor by a better agreement with a theoretical model which explicitly takes into account a quenching feature. This is in agreement with the conclusion from gamma-ray spectroscopy and confirms modern shell-model calculations. (C) 2016 Published by Elsevier B.V. This is an open access article under the CC BY license.
Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2016.01.039DOI ID：10.1016/j.physletb.2016.01.039,
ISSN：0370-2693,
eISSN：1873-2445,
Web of Science ID：WOS:000369601000043 Development of secondary electron time detector for ion beams
S. Suzuki; A. Ozawa; T. Moriguchi; Y. Ichikawa; M. Amano; D. Kamioka; Y. Tajiri; K. Hiraishi; T. Matsumoto; D. Nagae; Y. Abe; S. Naimi; T. Yamaguchi; S. Omika; Z. Ge; N. Tadano; K. Wakayama; A. Kitagawa; S. Sato
Proceedings of Science, 巻：2016-, 2016年
A time detector is under development for the mass measurement with the Rare-RI (radioactive isotope) Ring at the RI beam factory (RIBF) in RIKEN. To perform successful mass measurement, a time detector requires a small energy loss of the ion beams, a good time resolution, and a sufficient detection efficiency. To satisfy these requirements, our time detector utilizes isochronous transport of the secondary electrons emitted from a thin foil. The isochronous transport of the electrons from the foil to the micro-channel plate (MCP) detector is provided by the crossed electromagnetic field. To improve the detection efficiency, the transport time of the electrons is reduced by a factor of two using a strong magnetic field. An experiment to test the performance of the time detector was carried out with heavy ion beams. The time resolution was σ <
100 ps with a maximum detection efficiency of 99% for heavy ion beams. The details of the detector are presented in this contribution.
Proceedings of Science (PoS), 英語, 研究論文（国際会議プロシーディングス）
ISSN：1824-8039, SCOPUS ID：85034566448
Nuclear reactions in the storage ring ESR with EXL Th Kroell; M. von Schmid; J. C. Zamora; S. Bagchi; S. Boenig; M. Csatlos; I. Dillmann; C. Dimopoulou; P. Egelhor; V. Eremin; T. Furuno; H. Geissel; R. Gernhaeuser; M. N. Harakeh; A. L. Hartig; S. Ileva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; M. Kuilman; S. Litvinov; Yu A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. Steck; B. Streicher; L. Stuhl; M. Thuerauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. Zenihiro
XXI INTERNATIONAL SCHOOL ON NUCLEAR PHYSICS, NEUTRON PHYSICS AND APPLICATIONS & INTERNATIONAL SYMPOSIUM ON EXOTIC NUCLEI (ISEN-2015),
巻：724, 2016年,
［査読有り］The EXL project aims to study nuclear structure by direct reactions in inverse kinematics at the storage rings of the future FAIR facility. In this contribution, we present the status of the project: the technical implementation at the ESR at GSI and preliminary results of the EXL campaign in 2012, the first using also a radioactive beam.
IOP PUBLISHING LTD, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1088/1742-6596/724/1/012026DOI ID：10.1088/1742-6596/724/1/012026,
ISSN：1742-6588,
Web of Science ID：WOS:000398387000026 Fast-kicker system for rare-RI ring Y. Yamaguchi; H. Miura; M. Wakasugi; Y. Abe; A. Ozawa; F. Suzaki; A. Tokuchi; T. Uesaka; T. Yamaguchi; Y. Yano
PHYSICA SCRIPTA,
巻：T166,
開始ページ：014056, 2015年11月,
［査読有り］We are developing a new fast-kicker system for rare-RI ring at RIKEN RI beam factory. New fast-kicker system enables us to inject a rare particle into the ring individually, and also to extract the rare particle from the ring quickly. It consists of a kicker power supply, which has a fast-response mechanism and a hybrid charging system, and a large acceptance kicker magnet. Propagation time from a trigger signal input to the power supply until the flat-top center of the kicker magnetic field is approximately 465 ns, the result is sufficient to achieve an individual injection with an energy of 200 MeV/nucleon. Reliable operation of the hybrid charging system makes it possible to extract a particle from the ring in 700 mu s by using the same kicker magnet. A waveform of the magnetic field is under investigation by using a prototype kicker magnet.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2015/T166/014056DOI ID：10.1088/0031-8949/2015/T166/014056,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000368901600057 Isochronous field study of the Rare-RI Ring Y. Abe; Y. Yamaguchi; M. Wakasugi; T. Uesaka; A. Ozawa; F. Suzaki; D. Nagae; H. Miura; T. Yamaguchi; Y. Yano
PHYSICA SCRIPTA,
巻：T166,
開始ページ：014039, 2015年11月,
［査読有り］Construction of the Rare-RI Ring to measure masses of short-lived rare-RI with a relative precision of 10(-6) is in progress at RIKEN. The Rare-RI Ring consists of six sectors where each sector consists of four dipole magnets. Since the mass measurement is done by the isochronous mass spectrometry in the Rare-RI Ring, creating isochronous magnetic field is one of the important issues in mass measurements with the Rare-RI Ring. In order to make an isochronous field, we installed ten trim coils in the two outer dipoles among the four dipoles in each sector magnet. The isochronism of the magnetic field have been confirmed by measuring time-of-flight (TOF) of alpha particles from an alpha-source (Am-241). We measured TOF of alpha particles while changing the radial gradient of the magnetic field by trim coils and evaluated the isochronism from standard deviation of the TOF spectrum. The TOF width is minimum for a radial gradient of magnetic field (partial derivative B-z/partial derivative r) /B-0 = 0.205m(-1), which is in good agreement with the simulated value.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2015/T166/014047DOI ID：10.1088/0031-8949/2015/T166/014047,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000368901600048 Investigation of the nuclear matter distribution of Ni-56 by elastic proton scattering in inverse kinematics M. von Schmid; S. Bagchi; S. Bonig; M. Csatlos; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhaeuser; M. N. Harakeh; A-L Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; T. Kroell; M. Kuilman; S. Litvinov; Yu A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. Steck; B. Streicher; L. Stuhl; M. Thuerauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. C. Zamora; J. Zenihiro
PHYSICA SCRIPTA,
巻：T166, 2015年11月,
［査読有り］We have measured the nuclear-matter distribution of the doubly-magic N = Z nucleus Ni-56 by investigating elastic proton scattering in inverse kinematics. The radioactive beam of Ni-56 was injected and stored in the experimental storage ring (ESR, GSI) and interacted with an internal hydrogen gas-jet target. The high revolution frequency of the ions in the ring enabled a high luminosity, despite the low density of the target being used. This way, measurements at very low momentum transfers became possible. By measuring the energy and the scattering angle of the recoiling protons, we were able to separate the elastic reaction channel from inelastic scattering to the first excited 2(+) state of Ni-56 and deduced the differential cross section of Ni-56 (p, p)(56) Ni. The data were analyzed within the framework of the Glauber multiple-scattering theory in order to extract the nuclear-matter radius and radial matter distribution of Ni-56. Parameterizing the matter distribution with the phenomenological Symmetrized Fermi distribution, a preliminary value of 3.5 fm for the rms matter radius was deduced. This experiment was part of an EXL (EXotic nuclei studied in Light-ion induced reactions at storage rings) campaign at GSI in 2012 and was the first successful investigation of nuclear reactions with a stored radioactive beam ever.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2015/T166/014005DOI ID：10.1088/0031-8949/2015/T166/014005,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000368901600006 Isoscalar giant resonance studies in a stored-beam experiment within EXL J. C. Zamora; S. Bagchi; S. Bonig; M. Csatlos; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhaeuser; M. N. Harakeh; A-L Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; K. Kollmus; C. Kozhuharov; A. Krasznahorkay; T. Kroell; M. Kuilman; S. Litvinov; Yu A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. von Schmid; M. Steck; B. Streicher; L. Stuhl; M. Thuerauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. Zenihiro
PHYSICA SCRIPTA,
巻：T166, 2015年11月,
［査読有り］In the first campaign of the exotic nuclei studied with light-ion induced reaction in storage rings (EXL) collaboration at the existing storage ring experimental heavy-ion storage ring (ESR) at Helmholtz Center for Heavy Ion Research (GSI), we performed the first experiments using a stored beam of Ni-58 and an internal helium gas-jet target aiming for the investigation of isoscalar giant resonances in inverse kinematics. In this experiment, inelastically scattered recoil particles (at very forward angles, theta(cm) <= 1 degrees) were detected with a dedicated setup, including ultra-high vacuum (UHV)-compatible double-sided silicon strip detector (DSSDs). Preliminary results show evidence for the excitation of the isoscalar giant monopole resonance (ISGMR) in the Ni-58 nucleus. This opens the opportunity to study in the near future giant resonances also with stored radioactive beams, like Ni-56, and extract important information about the nuclear matter incompressibility. In the present work the current status of the data analysis and results are shown and discussed.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2015/T166/014006DOI ID：10.1088/0031-8949/2015/T166/014006,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000368901600007 A resonant Schottky pick-up for Rare-RI Ring at RIKEN F. Suzaki; Y. Abe; A. Ozawa; T. Suzuki; T. Uesaka; M. Wakasugi; K. Yamada; T. Yamaguchi; Y. Yamaguchi; J. Zenihiro
PHYSICA SCRIPTA,
巻：T166, 2015年11月,
［査読有り］The Rare-RI Ring project has been launched at RIKEN. The Rare-RI Ring is a storage ring specially designed for the isochronous mass spectrometry of unstable nuclei. Precise mass measurements (delta m/m similar to 10(-6)) are necessary to reveal the r-process path and, therefore, the ion-optical conditions must be tuned to yield isochronicity of order 10(-6). For this purpose, we employ a highly sensitive resonant Schottky cavity as a probe for single-ion detection. Here, we first explain this technique theoretically and derive the necessary equations. Then, based on the results of off-line tests, we determine the sensitivity of the Schottky pick-up and estimate the intensities of the signals induced inside the cavity.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2015/T166/014059DOI ID：10.1088/0031-8949/2015/T166/014059,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000368901600060 Spatial distributions of photons in plastic scintillator detected by multi-anode photomultiplier for heavy-ion position determination S. Omika; T. Yamaguchi; M. Fukuda; A. Kitagawa; S. Matsunaga; D. Nagae; D. Nishimura; T. Nishimura; A. Ozawa; S. Sato; K. Sawahata; T. Suzuki; Y. Takeuchi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,
巻：797,
開始ページ：247,
終了ページ：254, 2015年10月,
［査読有り］The spatial distributions of scintillation photons in a plastic scintillation detector were measured using a multi anode photomultiplier H7546A coupled with 1-mm-diameter optical fibers. A row of several tens of fibers connected to the scintillator generates one-dimensional spatial distributions of photons induced by the swift passage of heavy ions. The pulse heights from each channel change depending on the beam position. This can be utilized to determine the positions of the heavy ions. To test the performance of the proposed detection method, an experiment using a 84Kr beam with intermediate energies ranging from 40 to 85 MeV/nucleon was performed at the heavy ion medical accelerator in Chiba (HlMAC). The photon spatial distributions were successfully observed. By optimizing the phoLomulLiplier bias voltage and threshold in the pulse height analyses, a detection efficiency of 98% and a position resolution of 1.1 mm in sigma were achieved simultaneously. (C) 2015 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2015.06.050DOI ID：10.1016/j.nima.2015.06.050,
ISSN：0168-9002,
eISSN：1872-9576,
SCOPUS ID：84937707436,
Web of Science ID：WOS:000360192400035 Velocity-dependent transverse momentum distribution of fragments produced from Ar 40 + Be 9 at 95 MeV/nucleon VELOCITY-DEPENDENT TRANSVERSE MOMENTUM ... S. MOMOTA et al. S. Momota; I. Tanihata; A. Ozawa; M. Notani; K. Yoshida; K. Morimoto; T. Yamaguchi; T. Onishi; A. Yoshida; Y. X. Watanabe; Z. Liu; A. Ono
Physical Review C - Nuclear Physics,
巻：92,
号：2, 2015年08月,
［査読有り］Transverse momentum (PT) distributions of projectilelike fragments produced at intermediate energy are investigated. PT distributions of fragments with mass AF=10-37, produced from an Ar40 beam with E=95MeV/nucleon and a Be target, are observed as a function of fragment velocity by using the Rikagaku Kenkyusho (RIKEN) Projectile Fragment Separator at RIKEN. The width of PT distribution (σT) decreases monotonically with longitudinal momentum (PL). The decreasing trend shows a clear dependence on fragment mass. The observed σT is analyzed with a linear function and successfully reproduced by a parameter to characterize the decreasing trend. σT at the primary beam velocity shows good agreement with the Goldhaber formula, which is obtained on the basis of the contribution of the Fermi momentum. In contrast, the σT at the center of the PL distribution as determined by using the fits and parametrized energy loss in the fragmentation process is consistent with the width, which includes an additional contribution from the orbital deflection of the projectile. The antisymmetrized molecular-dynamics calculation indicates that the contribution of impact parameters is an important factor in understanding the behavior of the PT distribution. In addition, the practical formulation for σT obtained in the present study enables a reliable characterization of the fragments, which would be applicable to various research fields involving, for example, radioactive nuclear beams.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.92.024608DOI ID：10.1103/PhysRevC.92.024608,
ISSN：1089-490X,
SCOPUS ID：84939606853 Between atomic and nuclear physics: radioactive decays of highly-charged ions Dinko Atanasov; Klaus Blaum; Fritz Bosch; Carsten Brandau; Paul Buehler; Xiangcheng Chen; Iris Dillmann; Thomas Faestermann; Bingshui Gao; Hans Geissel; Roman Gernhaeuser; Siegbert Hagmann; Takuji Izumikawa; Pierre-Michel Hillenbrand; Christophor Kozhuharov; Jan Kurcewicz; Sergey A. Litvinov; Yuri A. Litvinov; Xinwen Ma; Gottfried Muenzenberg; Mohammad Ali Najafi; Fritz Nolden; Takashi Ohtsubo; Akira Ozawa; Fatma Cagla Ozturk; Zygmunt Patyk; Matthew Reed; Rene Reifarth; Mohammad Shahab Sanjari; Dieter Schneider; Markus Steck; Thomas Stoehlker; Baohua Sun; Fumi Suzaki; Takeshi Suzuki; Christian Trageser; Xiaolin Tu; Tomohiro Uesaka; Philip Walker; Meng Wang; Helmut Weick; Nicolas Winckler; Philip Woods; Hushan Xu; Takayuki Yamaguchi; Xinliang Yan; Yuhu Zhang
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,
巻：48,
号：14, 2015年07月,
［査読有り］Highly charged radioactive ions can be stored for extended periods of time in storage rings which allows for precision measurements of their decay modes. The straightforward motivation for performing such studies is that fully ionised nuclei or few-electron ions can be viewed as clean quantum-mechanical systems, in which the interactions of the many electrons can be either excluded or treated precisely. Thus, the influence of the electron shell on the decay probability can be investigated. Another important motivation is stellar nucleosynthesis, which proceeds at high temperatures and the involved atoms are therefore highly ionised. Presented here is a compact review of the relevant experiments conducted at heavy-ion storage rings. Furthermore, we outline the perspectives for future experiments at new-generation storage-ring facilities.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0953-4075/48/14/144024DOI ID：10.1088/0953-4075/48/14/144024,
ISSN：0953-4075,
eISSN：1361-6455,
Web of Science ID：WOS:000357529800025 Reaction Cross Sections for 8He and 14B on Proton target for the Separation of Proton and Neutron Density DistributionsMasaomi Tanaka; Mitsunori Fukuda; Daiki Nishimura; Shinji Suzuki; Maya Takechi; Mototsugu Mihara; Kensaku Matsuta; Yusuke Morita; Yasuto Kamisho; Junichi Ohno; Ryosuke Kanbe; Shintaro Yamaoka; Kota Watanabe; Takashi Ohtsubo; Takuji Izumikawa; Masayuki Nagashima; Akira Honma; Daiki Murooka; Takashi Suzuki; Takayuki Yamaguchi; Junpei Kohno; Sayaka Yamaki; Satoshi Matsunaga; Shunpei Kinno; Yoshimasa Taguchi; Atsushi Kitagawa; Shigekazu Fukuda; Shinji Sato
Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014), 2015年06月,
［査読有り］Journal of the Physical Society of Japan, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.7566/jpscp.6.020026DOI ID：10.7566/jpscp.6.020026 Nucleon Density Distribution of the Proton Drip-Line Nucleus 12N Studied via Reaction Cross SectionsMitsunori Fukuda; Yusuke Morita; Daiki Nishimura; Maya Takechi; Kodai Iwamoto; Masaru Wakabayashi; Yasuto Kamisho; Junichi Ohno; Masaomi Tanaka; Ryosuke Kanbe; Shintaro Yamaoka; Mototsugu Mihara; Kensaku Matsuta; Kenta Yoshinaga; Ifan Zhu; Junpei Khono; Sayaka Yamaki; Takeshi Suzuki; Takayuki Yamaguchi; Shinji Suzuki; Masayuki Nagashima; Kohsuke Abe; Keisuke Tashiro; Akira Honma; Takashi Ohtsubo; Takuji Izumikawa; Shinji Sato; Shigekazu Fukuda; Atsushi Kitagawa
Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014), 2015年06月
Journal of the Physical Society of Japan, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.7566/jpscp.6.030103DOI ID：10.7566/jpscp.6.030103 Velocity-dependent transverse momentum distribution of fragments produced from 40Ar+9Be at 95 MeV/nucleon S. Momota; I. Tanihata; A. Ozawa; M. Notani; K. Yoshida; K. Morimoto; T. Yamaguchi; T. Onishi; A. Yoshida; Y.X. Watanabe; Z. Liu; A. Ono
Physical Review C,
巻：92,
開始ページ：024608, 2015年,
［査読有り］英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.92.024608DOI ID：10.1103/PhysRevC.92.024608,
ISSN：2469-9993 Density distribution of Li-8 and B-8 and capture reaction at low energy G. W. Fan; M. Fukuda; D. Nishimura; X. L. Cai; S. Fukuda; I. Hachiuma; C. Ichikawa; T. Izumikawa; M. Kanazawa; A. Kitagawa; T. Kuboki; M. Lantz; M. Mihara; M. Nagashima; K. Namihira; Y. Ohkuma; T. Ohtsubo; Zhongzhou Ren; S. Sato; Z. Q. Sheng; M. Sugiyama; S. Suzuki; T. Suzuki; M. Takechi; T. Yamaguchi; W. Xu
PHYSICAL REVIEW C,
巻：91,
号：1, 2015年01月,
［査読有り］Reaction cross sections of Li-8 on stable targets were measured at intermediate energies. With the existing experimental data of interaction cross sections at 790 MeV/nucleon the nucleon density distribution of Li-8 was extracted by the use of the modified Glauber model. Meanwhile, the existing data of B-8 have been also reanalyzed. Structures of Li-8 and B-8 were compared through the density. On the basis of dilute surface densities, the discussion of Li-7(n,gamma) Li-8 and Be-7(p,gamma) B-8 capture reactions was performed within the framework of the direct capture reaction mechanism. The calculations agreed quite well with the experimental data as well as other analyses.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.91.014614DOI ID：10.1103/PhysRevC.91.014614,
ISSN：0556-2813,
eISSN：1089-490X,
SCOPUS ID：84961366399,
Web of Science ID：WOS:000349353100002 Cherenkov light detection as a velocity selector for uranium fission products at intermediate energies T. Yamaguchi; A. Enomoto; J. Kouno; S. Yamaki; S. Matsunaga; F. Suzaki; T. Suzuki; Y. Abe; D. Nagae; S. Okada; A. Ozawa; Y. Saito; K. Sawahata; A. Kitagawa; S. Sato
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,
巻：766,
開始ページ：123,
終了ページ：125, 2014年12月,
［査読有り］The in-flight particle separation capability of intermediate energy radioactive ion (RI) beams produced at a fragment separator can be improved with the Cherenkov light detection technique. The cone angle of Cherenkov light emission varies as a function of beam velocity. This can be exploited as a velocity selector for secondary beams. Using heavy ion beams available at the HIMAC synchrotron facility, the Cherenkov light angular distribution was measured for several thin radiators with high refractive indices (n = 1.9 similar to 2.1). A velocity resolution of similar to 10(-3) was achieved for a Fe-56 beam with an energy of 500 MeV/ nucleon. Combined with the conventional rigidify selection technique coupled with energy loss analysis, the present method will enable the efficient selection of an exotic species from huge amounts of various nuclides, such as uranium fission products at the BigRIPS fragment separator located at the RI Beam Factory, (C) 2014 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2014.04.021DOI ID：10.1016/j.nima.2014.04.021,
ISSN：0168-9002,
eISSN：1872-9576,
Web of Science ID：WOS:000344622200029 Evidence of halo structure in Mg-37 observed via reaction cross sections and intruder orbitals beyond the island of inversion M. Takechi; S. Suzuki; D. Nishimura; M. Fukuda; T. Ohtsubo; M. Nagashima; T. Suzuki; T. Yamaguchi; A. Ozawa; T. Moriguchi; H. Ohishi; T. Sumikama; H. Geissel; N. Aoi; Rui-Jiu Chen; De-Qing Fang; N. Fukuda; S. Fukuoka; H. Furuki; N. Inabe; Y. Ishibashi; T. Itoh; T. Izumikawa; D. Kameda; T. Kubo; M. Lantz; C. S. Lee; Yu-Gang Ma; K. Matsuta; M. Mihara; S. Momota; D. Nagae; R. Nishikiori; T. Niwa; T. Ohnishi; K. Okumura; M. Ohtake; T. Ogura; H. Sakurai; K. Sato; Y. Shimbara; H. Suzuki; H. Takeda; S. Takeuchi; K. Tanaka; M. Tanaka; H. Uenishi; M. Winkler; Y. Yanagisawa; S. Watanabe; K. Minomo; S. Tagami; M. Shimada; M. Kimura; T. Matsumoto; Y. R. Shimizu; M. Yahiro
PHYSICAL REVIEW C,
巻：90,
号：6, 2014年12月,
［査読有り］Precise reaction cross sections (sigma R) for (24- 38) Mg on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The sigma R for (36-38) Mg have been measured for the first time. An enhancement of sR compared to the systematics for spherical stable nuclei has been observed, especially in the neutron-rich region, which reflects the deformation of those isotopes. In the vicinity of the drip line the sR for Mg-37 is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of sR for Mg-37 should come from the p-orbital halo formation breaking the N = 28 shell gap.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.90.061305DOI ID：10.1103/PhysRevC.90.061305,
ISSN：0556-2813,
eISSN：1089-490X,
Web of Science ID：WOS:000347201900001 Structure of Li-8 from a reaction cross-section measurement G. W. Fan; M. Fukuda; D. Nishimura; X. L. Cai; S. Fukuda; I. Hachiuma; C. Ichikawa; T. Izumikawa; M. Kanazawa; A. Kitagawa; T. Kuboki; M. Lantz; M. Mihara; M. Nagashima; K. Namihira; Y. Ohkuma; T. Ohtsubo; Zhongzhou Ren; S. Sato; Z. Q. Shen; M. Sugiyama; S. Suzuki; T. Suzuki; M. Takechi; T. Yamaguchi; B. J. Xu; W. Xu
PHYSICAL REVIEW C,
巻：90,
号：4, 2014年10月,
［査読有り］We have precisely measured reaction cross sections (sigma(R)) for Li-8 using Be-9, C-12, Al-27, and proton targets at intermediate energies by the transmission method. From the energy dependence of the sigma(R) including the high energy data, the density distribution of Li-8 was deduced through a modified Glauber model. It is shown that Li-8 has a shorter tail structure in the density as compared with that of B-8 and the matter radius of Li-8 is similar to those of the other nonhalo Li isotopes. The result is consistent with the previous experiments that there is a tendency for Li-8 to be a skin nucleus.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.90.044321DOI ID：10.1103/PhysRevC.90.044321,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000344032900002 Density distribution of 14Be from reaction cross-section measurements T. Moriguchi; A. Ozawa; S. Ishimoto; Y. Abe; M. Fukuda; I. Hachiuma; Y. Ishibashi; Y. Ito; T. Kuboki; M. Lantz; D. Nagae; K. Namihira; D. Nishimura; T. Ohtsubo; H. Ooishi; T. Suda; H. Suzuki; T. Suzuki; M. Takechi; K. Tanaka; T. Yamaguchi
Nuclear Physics A,
巻：929,
開始ページ：83,
終了ページ：93, 2014年09月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2014.06.003DOI ID：10.1016/j.nuclphysa.2014.06.003,
ISSN：0375-9474 Charge and frequency resolved isochronous mass spectrometry and the mass of 51Co P. Shuai; H.S. Xu; X.L. Tu; Y.H. Zhang; B.H. Sun; M. Wang; Yu.A. Litvinov; K. Blaum; X.H. Zhou; J.J. He; Y. Sun; K. Kaneko; Y.J. Yuan; J.W. Xia; J.C. Yang; G. Audi; X.L. Yan; X.C. Chen; G.B. Jia; Z.G. Hu; X.W. Ma; R.S. Mao; B. Mei; Z.Y. Sun; S.T. Wang; G.Q. Xiao; X. Xu; T. Yamaguchi; Y. Yamaguchi; Y.D. Zang; H.W. Zhao; T.C. Zhao; W. Zhang; W.L. Zhan
Physics Letters B,
巻：735,
開始ページ：327,
終了ページ：331, 2014年07月,
［査読有り］Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2014.06.046DOI ID：10.1016/j.physletb.2014.06.046,
ISSN：0370-2693 First EXL experiment with stored radioactive beam: Proton scattering on 56Ni M. Von Schmid; S. Bagchi; S. Bönig; M. Csatlós; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhäuser; M. N. Harakeh; A. L. Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; T. Kröll; M. Kuilman; S. Litvinov; Yu A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. Steck; B. Streicher; L. Stuhl; M. Thürauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. C. Zamora; J. Zenihiro
EPJ Web of Conferences,
巻：66, 2014年,
［査読有り］EXL (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring) is a project within NUSTAR at FAIR. It aims at investigations of light-ion induced direct reactions in inverse kinematics with radioactive ions cooled and stored in the future NESR (New Experimental Storage Ring). The existing ESR (Experimental Storage Ring) at GSI, together with its internal gas-jet target, provides a unique opportunity to perform such kind of experiments on a smaller scale at the present time. We have developed a UHV-compatible (Ultra High Vacuum) detector setup mainly based on DSSDs (Double-sided Silicon-Strip Detector) for the target-like recoils [4]. With this setup we were able to successfully investigate reactions with a stored radioactive beam for the first time ever. As a part of the first EXL campaign we investigated the reaction 56Ni(p,p)56Ni in inverse kinematics in order to measure the differential cross section for elastic proton scattering and deduce the nuclear-matter distribution and radius of 56Ni. In the following, the experimental setup is introduced in more detail, and the current status of the ongoing analysis is discussed. © Owned by the authors, published by EDP Sciences, 2014.
研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1051/epjconf/20146603093Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84898768723&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84898768723&origin=inwardDOI ID：10.1051/epjconf/20146603093,
ISSN：2101-6275,
eISSN：2100-014X,
SCOPUS ID：84898768723 First EXL experiment with stored radioactive beam: Proton scattering on Ni-56 M. von Schmid; S. Bagchi; S. Boenig; M. Csatlos; I. Dillmann; C. Dimopoulou; P. Egelhof; V. Eremin; T. Furuno; H. Geissel; R. Gernhaeuser; M. N. Harakeh; A. -L. Hartig; S. Ilieva; N. Kalantar-Nayestanaki; O. Kiselev; H. Kollmus; C. Kozhuharov; A. Krasznahorkay; T. Kroell; M. Kuilman; S. Litvinov; Yu A. Litvinov; M. Mahjour-Shafiei; M. Mutterer; D. Nagae; M. A. Najafi; C. Nociforo; F. Nolden; U. Popp; C. Rigollet; S. Roy; C. Scheidenberger; M. Steck; B. Streicher; L. Stuhl; M. Thuerauf; T. Uesaka; H. Weick; J. S. Winfield; D. Winters; P. J. Woods; T. Yamaguchi; K. Yue; J. C. Zamora; J. Zenihiro
INPC 2013 - INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, VOL. 1,
巻：66, 2014年,
［査読有り］EXL (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring) is a project within NUSTAR at FAIR. It aims at investigations of light-ion induced direct reactions in inverse kinematics with radioactive ions cooled and stored in the future NESR (New Experimental Storage Ring). The existing ESR (Experimental Storage Ring) at GSI, together with its internal gas-jet target, provides a unique opportunity to perform such kind of experiments on a smaller scale at the present time. We have developed a UHV-compatible (Ultra High Vacuum) detector setup mainly based on DSSDs (Double-sided Silicon-Strip Detector) for the target-like recoils [4]. With this setup we were able to successfully investigate reactions with a stored radioactive beam for the first time ever. As a part of the first EXL campaign we investigated the reaction Ni-56(p,p)Ni-56 in inverse kinematics in order to measure the differential cross section for elastic proton scattering and deduce the nuclear-matter distribution and radius of Ni-56. In the following, the experimental setup is introduced in more detail, and the current status of the ongoing analysis is discussed.
E D P SCIENCES, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1051/epjconf/20146603093DOI ID：10.1051/epjconf/20146603093,
ISSN：2100-014X,
Web of Science ID：WOS:000342462000230 Construction of the SCRIT electron scattering facility at the RIKEN RI Beam Factory M. Wakasugi; T. Ohnishi; S. Wang; Y. Miyashita; T. Adachi; T. Amagai; A. Enokizono; A. Enomoto; Y. Haraguchi; M. Hara; T. Hori; S. Ichikawa; T. Kikuchi; R. Kitazawa; K. Koizumi; K. Kurita; T. Miyamoto; R. Ogawara; Y. Shimakura; H. Takehara; T. Tamae; S. Tamaki; M. Togasaki; T. Yamaguchi; K. Yanagi; T. Suda
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms,
巻：317,
開始ページ：668,
終了ページ：673, 2013年12月
The SCRIT electron scattering facility, aiming at electron scattering off short-lived unstable nuclei, has been constructed at the RIKEN RI Beam Factory. This facility consists of a racetrack microtron (RTM), an electron storage ring (SR2) equipped with the SCRIT system, and a low-energy RI separator (ERIS). SCRIT (self-confining radioactive isotope ion targeting) is a novel technique to form internal targets in an electron storage ring. Experiments for evaluating performance of the SCRIT system have been carried out using the stable 133Cs1+ beam and the 132Xe1+ beam supplied from ERIS. Target ions were successfully trapped in the SCRIT system with 90% efficiency at a 250 mA electron beam current, and luminosity exceeding 1026/(cm2 s) was maintained for more than 1 s. Electrons elastically scattered from the target ions were successfully measured. Applicability of the SCRIT system to electron scattering for unstable nuclei has been established in experiments.© 2013 Elsevier B.V. All rights reserved.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.04.037DOI ID：10.1016/j.nimb.2013.04.037,
ISSN：0168-583X,
SCOPUS ID：84890120320 Design study of a resonant Schottky pick-up for the Rare-RI Ring project F. Suzaki; J. Zenihiro; T. Yamaguchi; A. Ozawa; T. Uesaka; M. Wakasugi; K. Yamada; Y. Yamaguchi
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms,
巻：317,
開始ページ：636,
終了ページ：639, 2013年12月,
［査読有り］The new heavy-ion storage ring project Rare-RI Ring at the RIKEN RI Beam Factory launched in 2012 aims at precision isochronous mass spectrometry for single ions of exotic nuclides. To precisely tune the storage-ring ion optical conditions to the isochronous field setting, Schottky noise pick-up technique will be employed. Pillbox-type resonant cavity, similar to the Schottky pick-up system successfully operating at the experimental storage ring ESR at GSI, is adopted for the pick-up probe. To determine the design values of the cavity, we systematically performed a simulation study of three-dimensional electromagnetic field calculations in the high frequency region. High shunt impedance obtained in the simulation will enable us to detect stored single ions with charge down to qâ‰15.© 2013 Elsevier B.V. All rights reserved.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.07.062DOI ID：10.1016/j.nimb.2013.07.062,
ISSN：0168-583X,
SCOPUS ID：84890129187,
Web of Science ID：WOS:000329530400088 Performance of high-resolution position-sensitive detectors developed for storage-ring decay experiments T. Yamaguchi; F. Suzaki; T. Izumikawa; S. Miyazawa; K. Morimoto; T. Suzuki; F. Tokanai; H. Furuki; N. Ichihashi; C. Ichikawa; A. Kitagawa; T. Kuboki; S. Momota; D. Nagae; M. Nagashima; Y. Nakamura; R. Nishikiori; T. Niwa; T. Ohtsubo; A. Ozawa; K. Sato; S. Sato; S. Suzuki
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,
巻：317,
開始ページ：697,
終了ページ：700, 2013年12月,
［査読有り］As next generation spectroscopic tools, heavy-ion cooler storage rings will be a unique application of highly charged RI beam experiments. Decay spectroscopy of highly charged rare isotopes provides us important information relevant to the stellar conditions, such as for the s- and r-process nucleosynthesis. In-ring decay products of highly charged RI will be momentum-analyzed and reach a position-sensitive detector set-up located outside of the storage orbit. To realize such in-ring decay experiments, we have developed and tested two types of high-resolution position-sensitive detectors: silicon strips and scintillating fibers. The beam test experiments resulted in excellent position resolutions for both detectors, which will be available for future storage-ring experiments. (C) 2013 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.07.056DOI ID：10.1016/j.nimb.2013.07.056,
ISSN：0168-583X,
eISSN：1872-9584,
Web of Science ID：WOS:000329530400102 Systematic study of individual charge-changing cross sections of intermediate-energy secondary beams S. Yamaki; T. Yamaguchi; J. Kouno; K. Sato; N. Ichihashi; T. Suzuki; K. Abe; Y. Abe; M. Fukuda; H. Furuki; N. Inaba; K. Iwamoto; T. Izumikawa; Y. Kamisho; N. Kikuchi; A. Kitagawa; M. Mihara; S. Miyazawa; S. Momota; Y. Morita; D. Nagae; M. Nagashima; Y. Nakamura; R. Nishikiori; D. Nishimura; I. Nishizuka; T. Ohtsubo; J. Ohno; A. Ozawa; T. Sakai; S. Sato; D. Sera; F. Suzaki; S. Suzuki; S. Suzuki; M. Wakabayashi; M. Yaguchi; S. Yasumoto
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,
巻：317,
開始ページ：774,
終了ページ：778, 2013年12月,
［査読有り］Charge-changing interactions of stable and unstable medium-mass nuclides have been systematically investigated at intermediate energies. Secondary beams ranging from Ar to Ge isotopes produced by projectile fragmentation of Fe-56 and Ge-76 were irradiated onto a carbon target, and their total and partial charge-changing cross sections were precisely measured. A clear odd even effect found in the partial charge-changing cross sections monotonically varies as a function of the Z/N ratio among the isotopes, and grows toward the neutron-deficient side. The total charge-changing cross sections are sensitive to the Z number of nuclides, and tend to gradually increase toward the neutron-deficient side in some isotopes. (C) 2013 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.05.057DOI ID：10.1016/j.nimb.2013.05.057,
ISSN：0168-583X,
eISSN：1872-9584,
SCOPUS ID：84890121071,
Web of Science ID：WOS:000329530400116 Construction of rare-RI ring at RIKEN RI Beam Factory Y. Yamaguchi; M. Wakasugi; T. Uesaka; A. Ozawa; Y. Abe; T. Fujinawa; M. Kase; M. Komiyama; T. Kubo; K. Kumagai; T. Maie; D. Nagae; J. Ohnishi; F. Suzaki; A. Tokuchi; Y. Watanabe; K. Yoshida; K. Yamada; T. Yamaguchi; H. Yamasawa; Y. Yanagisawa; J. Zenihiro; Y. Yano
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms,
巻：317,
開始ページ：629,
終了ページ：635, 2013年12月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.06.004DOI ID：10.1016/j.nimb.2013.06.004,
ISSN：0168-583X Time-of-flight detector applied to mass measurements in Rare-RI Ring D. Nagae; Y. Abe; S. Okada; A. Ozawa; T. Yamaguchi; H. Suzuki; T. Moriguchi; Y. Ishibashi; S. Fukuoka; R. Nishikiori; T. Niwa; T. Suzuki; F. Suzaki; K. Sato; H. Furuki; N. Ichihashi; S. Miyazawa; Y. Yamaguchi; T. Uesaka; M. Wakasugi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,
巻：317,
開始ページ：640,
終了ページ：643, 2013年12月,
［査読有り］A large time-of-flight (TOF) detector has been developed for the Rare-RI Ring. This detector consists of a Multi Channel Plate (MCP) and a carbon foil. Secondary electrons from the carbon foil are transported to the MCP by crossed electric and magnetic fields. In order to cover the beam size of the ring, a large and thin carbon foil (100 mm x 50 mm(2) and 60 mu g/cm(2)) is used as a sensitive material. The time resolution of sigma approximate to 130 ps, the detection efficiency about 56% and a position dependence of the TOF about 1 ns are obtained. A calculated position dependence of TOF adopting experimental (inhomogeneous) electric field and a homogeneous magnetic field is in agreement with the experimental one. These results suggest that the homogeneity of electric field is important to improve the time resolution in the large size detector. (C) 2013 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2013.08.053DOI ID：10.1016/j.nimb.2013.08.053,
ISSN：0168-583X,
eISSN：1872-9584,
Web of Science ID：WOS:000329530400089 High-resolution measurement of the time-modulated orbital electron capture and of the β+ decay of hydrogen-like 142Pm60+ ions P. Kienle; F. Bosch; P. Bühler; T. Faestermann; Yu.A. Litvinov; N. Winckler; M.S. Sanjari; D.B. Shubina; D. Atanasov; H. Geissel; V. Ivanova; X.L. Yan; D. Boutin; C. Brandau; I. Dillmann; Ch. Dimopoulou; R. Hess; P.-M. Hillebrand; T. Izumikawa; R. Knöbel; J. Kurcewicz; N. Kuzminchuk; M. Lestinsky; S.A. Litvinov; X.W. Ma; L. Maier; M. Mazzocco; I. Mukha; C. Nociforo; F. Nolden; Ch. Scheidenberger; U. Spillmann; M. Steck; Th. Stöhlker; B.H. Sun; F. Suzaki; T. Suzuki; S.Yu. Torilov; M. Trassinelli; X.L. Tu; M. Wang; H. Weick; D.F.A. Winters; N. Winters; P.J. Woods; T. Yamaguchi; G.L. Zhang; T. Ohtsubo
Physics Letters B,
巻：726,
号：4-5,
開始ページ：638,
終了ページ：645, 2013年11月,
［査読有り］The periodic time modulations, found recently in the two-body orbital electron capture (EC) decay of both, hydrogen-like Pr-140(58+) and Pm-142(60+) ions, with periods near to 7 s and amplitudes of about 20%, were re-investigated for the case of Pm-142(60+) by using a 245 MHz resonator cavity with a much improved sensitivity and time resolution. We observed that the exponential EC decay is modulated with a period T = 7.11(11) s, in accordance with a modulation period T = 7.12(11) s as obtained from simultaneous observations with a capacitive pick-up, employed also in the previous experiments. The modulation amplitudes amount to a(R) = 0.107(24) and a(P) = 0.134(27) for the 245 MHz resonator and the capacitive pick-up, respectively. These new results corroborate for both detectors exactly our previous findings of modulation periods near to 7 s, though with distinctly smaller amplitudes. Also the three-body beta(+) decays have been analyzed. For a supposed modulation period near to 7 s we found an amplitude a = 0.027(27), compatible with a = 0 and in agreement with the preliminary result a = 0.030(30) of our previous experiment. These observations could point at weak interaction as origin of the observed 7 s-modulation of the EC decay. Furthermore, the data suggest that interference terms occur in the two-body EC decay, although the neutrinos are not directly observed. (C) 2013 Elsevier B.V. All rights reserved.
Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2013.09.033DOI ID：10.1016/j.physletb.2013.09.033,
ISSN：0370-2693,
eISSN：1873-2445,
Web of Science ID：WOS:000327907000009 Beta decay of highly charged ions F. Bosch; D. R. Atanasov; C. Brandau; I. Dillmann; C. Dimopoulou; T. Faestermann; H. Geissel; S. Hagmann; P-M Hillenbrand; P. Kienle; R. Knoebel; C. Kozhuharov; J. Kurcewicz; M. Lestinsky; S. A. Litvinov; Yu A. Litvinov; X. Ma; F. Nolden; T. Ohtsubo; Z. Patyk; R. Reuschl; M. S. Sanjari; C. Scheidenberger; D. Shubina; U. Spillmann; M. Steck; Th Stoehlker; B. Sun; M. Trassinelli; S. Trotsenko; X. L. Tu; H. Weick; N. Winckler; M. Winkler; D. F. A. Winters; T. Yamaguchi; X. L. Yan
PHYSICA SCRIPTA,
巻：T156, 2013年09月,
［査読有り］A brief overview is presented in this paper on some experiments conducted at the Experimental Storage Ring (ESR) of GSI which addressed the beta decay of stored and cooled highly charged ions. Special emphasis is placed on the two-body beta decay of bare or few-electron ions: bound-state beta(-) decay (beta(b)) and its time-mirrored counterpart, orbital electron capture. The former decay mode was detected experimentally 20 years ago at the ESR. The latter could be investigated there for the first time in detail for the simplest quantum systems: hydrogen-and helium-like atoms. The main results of these experiments will be presented. Also their impact on stellar nucleosynthesis, in particular the s-process, is discussed.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2013/T156/014025DOI ID：10.1088/0031-8949/2013/T156/014025,
ISSN：0031-8949,
eISSN：1402-4896,
Web of Science ID：WOS:000329022300026 The challenge of precision mass measurements of short-lived exotic nuclei: Development of a new storage ring mass spectrometry T. Yamaguchi; Y. Yamaguchi; A. Ozawa
International Journal of Mass Spectrometry,
巻：349-350,
開始ページ：240,
終了ページ：246, 2013年09月,
［査読有り］Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.ijms.2013.04.027DOI ID：10.1016/j.ijms.2013.04.027,
ISSN：1387-3806 MASS MEASUREMENT OF 45Cr AND ITS IMPACT ON THE Ca-Sc CYCLE IN X-RAY BURSTSX. L. Yan; H. S. Xu; Yu. A. Litvinov; Y. H. Zhang; H. Schatz; X. L. Tu; K. Blaum; X. H. Zhou; B. H. Sun; J. J. He; Y. Sun; M. Wang; Y. J. Yuan; J. W. Xia; J. C. Yang; G. Audi; G. B. Jia; Z. G. Hu; X. W. Ma; R. S. Mao; B. Mei; P. Shuai; Z. Y. Sun; S. T. Wang; G. Q. Xiao; X. XU; T. Yamaguchi; Y. Yamaguchi; Y. D. Zang; H. W. Zhao; T. C. Zhao; W. Zhang; W. L. Zhan
The Astrophysical Journal,
巻：766,
号：1,
開始ページ：L8,
終了ページ：L8, 2013年03月,
［査読有り］IOP Publishing, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/2041-8205/766/1/l8DOI ID：10.1088/2041-8205/766/1/l8,
ISSN：2041-8205,
eISSN：2041-8213 New Result on the Production of 277Cn by the 208Pb + 70Zn Reaction Sumita Takayuki; Morimoto Kouji; Kaji Daiya; Haba Hiromitsu; Ozeki Kazutaka; Sakai Ryutaro; Yoneda Akira; Yoshida Atsushi; Hasebe Hiroo; Katori Kenji; Sato Nozomi; Wakabayashi Yasuo; Mitsuoka Shin-ichi; Goto Shin-ichi; Murakami Masashi; Kariya Yoshiki; Tokanai Fuyuki; Mayama Keita; Takeyama Mirei; Moriya Toru; Ideguchi Eiji; Yamaguchi Takayuki; Kikunaga Hidetoshi; Chiba Junsei; Morita Kosuke
Journal of the Physical Society of Japan,
巻：82,
号：2,
開始ページ：024202,
終了ページ：024202, 2013年02月,
［査読有り］The Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.7566/jpsj.82.024202DOI ID：10.7566/jpsj.82.024202,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：160000036320 Half-life measurements of highly charged radionuclides D. R. Atanasov; D. Balabanski; L. Batist; K. Blaum; F. Bosch; D. Boutin; C. Brandau; C. Dimopoulou; H. G. Essel; T. Faestermann; H. Geissel; S. Hagmann; R. Hess; P. M. Hillenbrand; P. Kienle; R. Knöbel; C. Kozhuharov; J. Kurcewicz; M. Lestinsky; S. A. Litvinov; Yu A. Litvinov; X. Ma; R. Märtin; M. Mazzocco; G. Münzenberg; F. Nolden; T. Ohtsubo; Z. Patyk; M. S. Sanjari; C. Scheidenberger; D. Shubina; U. Spillmann; M. Steck; Th Stöhlker; B. Sun; T. Suzuki; S. Torilov; M. Trassinelli; S. Trotsenko; X. Tu; I. I. Tupitsyn; H. Weick; N. Winckler; M. Winkler; D. F.A. Winters; N. Winters; H. Xu; T. Yamaguchi; X. Yan; Y. Yuan; Y. Zhang
Physica Scripta,
巻：T156, 2013年
In recent years several measurements of the orbital electron capture half-lives of few-electron ions have been carried out employing the storage ring ESR at GSI. Hydrogen-like and helium-like 140Pr and 142Pm as well as hydrogen-like 122I were studied. Half-lives of the corresponding fully ionized nuclides provide the three-body β+ decay constants. © 2013 The Royal Swedish Academy of Sciences.
英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1088/0031-8949/2013/T156/014026DOI ID：10.1088/0031-8949/2013/T156/014026,
ISSN：0281-1847,
SCOPUS ID：84888585887 Observation of new microsecond isomers among fission products from in-flight fission of 345 MeV/nucleon U-238 D. Kameda; T. Kubo; T. Ohnishi; K. Kusaka; A. Yoshida; K. Yoshida; M. Ohtake; N. Fukuda; H. Takeda; K. Tanaka; N. Inabe; Y. Yanagisawa; Y. Gono; H. Watanabe; H. Otsu; H. Baba; T. Ichihara; Y. Yamaguchi; M. Takechi; S. Nishimura; H. Ueno; A. Yoshimi; H. Sakurai; T. Motobayashi; T. Nakao; Y. Mizoi; M. Matsushita; K. Ieki; N. Kobayashi; K. Tanaka; Y. Kawada; N. Tanaka; S. Deguchi; Y. Satou; Y. Kondo; T. Nakamura; K. Yoshinaga; C. Ishii; H. Yoshii; Y. Miyashita; N. Uematsu; Y. Shiraki; T. Sumikama; J. Chiba; E. Ideguchi; A. Saito; T. Yamaguchi; I. Hachiuma; T. Suzuki; T. Moriguchi; A. Ozawa; T. Ohtsubo; M. A. Famiano; H. Geissel; A. S. Nettleton; O. B. Tarasov; D. Bazin; B. M. Sherrill; S. L. Manikonda; J. A. Nolen
PHYSICAL REVIEW C,
巻：86,
号：5,
開始ページ：054319-1,
終了ページ：054319-4, 2012年11月,
［査読有り］A search for isomeric gamma decays among fission fragments from 345 MeV/nucleon U-238 has been performed at the RIKEN Nishina Center RI Beam Factory. Fission fragments were selected and identified using the superconducting in-flight separator BigRIPS and were implanted in an aluminum stopper. Delayed gamma rays were detected using three clover-type high-purity germanium detectors located at the focal plane within a time window of 20 mu s following the implantation. We identified a total of 54 microsecond isomers with half-lives of similar to 0.1-10 mu s, including the discovery of 18 new isomers in very neutron-rich nuclei: Ti-59(m), As-90(m), Se-92(m), Se-93(m), Br-94(m), Br-95(m), Br-96(m), Rb-97(m), Nb-108(m), Mo-109(m), Ru-117(m), Ru-119(m), Rh-120(m), Rh-122(m), Pd-121(m), Pd-124(m), Ag-124(m), and Ag-126(m), and obtained a wealth of spectroscopic information such as half-lives, gamma-ray energies, gamma-ray relative intensities, and gamma gamma coincidences over a wide range of neutron-rich exotic nuclei. Proposed level schemes are presented for Ti-59(m), Ga-82(m), Br-92(m), Br-94(m), Br-95(m), Rb-97(m), Rb-98(m), Nb-108(m), Zr-108(m), Mo-109(m), Ru-117(m), Ru-119(m), Rh-120(m), Rh-122(m), Pd-121(m), Ag-124(m), and Ag-125(m), based on the obtained spectroscopic information and the systematics in neighboring nuclei. The nature of the nuclear isomerism is discussed in relation to the evolution of nuclear structure.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.86.054319DOI ID：10.1103/PhysRevC.86.054319,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000311537600002 New Result in the Production and Decay of an Isotope, ²⁷⁸113, of the 113th Element MORITA Kosuke; MORIMOTO Kouji; KAJI Daiya; Haba Hiromitsu; Ozeki Kazutaka; Kudou Yuki; Sumita Takayuki; Wakabayashi Yasuo; Yoneda Akira; Tanaka Kengo; Yamaki Sayaka; Sakai Ryutaro; Akiyama Takahiro; Goto Shin-ichi; Hasebe Hiroo; Huang Minghui; Huang Tianheng; Ideguchi Eiji; Kasamatsu Yoshitaka; Katori Kenji; Kariya Yoshiki; Kikunaga Hidetoshi; Koura Hiroyuki; Kudo Hisaaki; Mashiko Akihiro; Mayama Keita; Mitsuoka Shin-ichi; Moriya Toru; Murakami Masashi; Murayama Hirohumi; Namai Saori; Ozawa Akira; Sato Nozomi; Sueki Keisuke; Takeyama Mirei; Tokanai Fuyuki; Yamaguchi Takayuki; Yoshida Atsushi
J Phys Soc Jpn,
巻：81,
号：10,
開始ページ：103201,
終了ページ：103201, 2012年10月,
［査読有り］An isotope of the 113th element, i.e., 278113, was produced in a nuclear reaction with a 70Zn beam on a 209Bi target. We observed six consecutive \alpha-decays following the implantation of a heavy particle in nearly the same position in the semiconductor detector under an extremely low background condition. The fifth and sixth decays are fully consistent with the sequential decays of 262Db and 258Lr in both decay energies and decay times. This indicates that the present decay chain consisted of 278113, 274Rg (Z=111), 270Mt (Z=109), 266Bh (Z=107), 262Db (Z=105), and 258Lr (Z=103) with firm connections. This result, together with previously reported results from 2004 and 2007, conclusively leads to the unambiguous production and identification of the isotope 278113 of the 113th element.
The Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.81.103201DOI ID：10.1143/jpsj.81.103201,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：40019447096,
CiNii Books ID：AA00704814 Measurements of α-decay half-lives at GSI C. Nociforo; F. Farinon; A. Musumarra; F. Bosch; D. Boutin; A. Del Zoppo; P. Figuera; M. Fisichella; H. Geissel; R. Knöbel; I. Kojouharov; C. Kozhuharov; T. Kuboki; J. Kurcewicz; Yu A. Litvinov; M. Mazzocco; Y. Motizuki; F. Nolden; T. Ohstubo; Y. Ohkuma; Z. Patyk; M. G. Pellegriti; S. Pietri; Z. Podolyak; A. Prochazka; M. S. Sanjari; C. Scheidenberger; V. Scuderi; B. Sun; T. Suzuki; D. Torresi; H. Weick; J. S. Winfield; N. Winckler; M. Winkler; H. J. Wollersheim; T. Yamaguchi
Physica Scripta,
巻：T150,
号：T150, 2012年10月,
［査読有り］One of the major problems in nuclear astrophysics concerns the estimation of electron screening effects on nuclear reaction rates. We have proposed investigating the electron screening effects of nuclear systems which decay via α-particles, using fragmented beams at relativistic energies produced at the present GSI FRS-ESR facility. By looking at the modification of the half-lives and Q α-value of highly charged emitters, we expect to estimate the electron screening energies. © 2012 The Royal Swedish Academy of Sciences.
IOP PUBLISHING LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1088/0031-8949/2012/T150/014028Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84866953042&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84866953042&origin=inwardDOI ID：10.1088/0031-8949/2012/T150/014028,
ISSN：0031-8949,
eISSN：1402-4896,
SCOPUS ID：84866953042,
Web of Science ID：WOS:000309605500029 Mass Measurements of the Neutron-DeficientTi41,Cr45,Fe49, andNi53Nuclides: First Test of the Isobaric Multiplet Mass Equation infp-Shell NucleiTakayuki Yamaguchi
Physical Review Letters,
巻：109,
号：10, 2012年09月,
［査読有り］American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.109.102501DOI ID：10.1103/physrevlett.109.102501,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280195 New results on mass measurements of stored neutron-rich nuclides in the element range from Pt to U with the FRS-ESR facility at 360-400 MeV/u L. Chen; W. R. Plass; H. Geissel; R. Knoebel; C. Kozhuharov; Yu A. Litvinov; Z. Patyk; C. Scheidenberger; K. Siegien-Iwaniuk; B. Sun; H. Weick; K. Beckert; P. Beller; F. Bosch; D. Boutin; L. Caceres; J. J. Carroll; D. M. Cullen; I. J. Cullen; B. Franzke; J. Gerl; M. Gorska; G. A. Jones; A. Kishada; J. Kurcewicz; S. A. Litvinov; Z. Liu; S. Mandal; F. Montes; G. Muenzenberg; F. Nolden; T. Ohtsubo; Zs Podolyak; R. Propri; S. Rigby; N. Saito; T. Saito; M. Shindo; M. Steck; P. M. Walker; S. Williams; M. Winkler; H. -J. Wollersheim; T. Yamaguchi
NUCLEAR PHYSICS A,
巻：882,
開始ページ：71,
終了ページ：89, 2012年05月,
［査読有り］Masses of U-238 projectile fragments have been measured with time-resolved Schottky Mass Spectrometry (SMS) at the FRS-ESR facility at GSI. The exotic nuclei were created in the production target at the entrance of the fragment separator FRS, spatially separated in flight and injected into the storage-cooler ring ESR at about 70% light velocity. This means the ions were mainly bare or carried only a few electrons, e.g., the population of Li-like ions was below 1% for Pt fragments. Accurate new mass values of 33 neutron-rich, stored exotic nuclei in the element range from platinum to uranium have been obtained for the first time. In total more than 150 nuclides including references with well-known masses have been covered in this large-area SMS measurement. A novel data analysis has been applied which reduces the systematic errors by taking into account the velocity profile of the cooler electrons and the residual ion-optical dispersion in this part of the storage ring. The experiment, the data analysis, and the mass values are presented. The experimental data are compared with theoretical predictions demonstrating systematic deviations of up to 1500 keV from modern mass models. (C) 2012 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2012.03.002DOI ID：10.1016/j.nuclphysa.2012.03.002,
ISSN：0375-9474,
Web of Science ID：WOS:000304639000006 Half-life measurements of stored fully ionized and hydrogen-like I-122 ions D. R. Atanasov; N. Winckler; D. Balabanski; L. Batist; F. Bosch; D. Boutin; C. Brandau; C. Dimopoulou; H. G. Essel; T. Faestermann; H. Geissel; I. Hachiuma; S. Hess; T. Izumikawa; P. Kienle; R. Knoebel; C. Kozhuharov; J. Kurcewicz; N. Kuzminchuk; S. A. Litvinov; Yu. A. Litvinov; R. S. Mao; R. Maertin; M. Mazzocco; G. Muenzenberg; K. Namihira; F. Nolden; T. Ohtsubo; Z. Patyk; R. Reuschl; M. S. Sanjari; C. Scheidenberger; D. Shubina; U. Spillmann; M. Steck; Th. Stoehlker; B. Sun; T. Suzuki; M. Trassinelli; I. I. Tupitsyn; H. Weick; M. Winkler; D. F. A. Winters; T. Yamaguchi
EUROPEAN PHYSICAL JOURNAL A,
巻：48,
号：2, 2012年02月,
［査読有り］The half-lives of fully ionized and hydrogen-like (H-like) I-122 ions have been measured in a heavy-ion storage ring. The beta(+)-decay constants for both charge states and the electron capture (EC) decay constant of H-like ions have been determined. The EC-decay constant in H-like I-122 ions lambda(H-like)(EC) = 7.35(33) . 10(-4) s(-1) is, within the uncertainty, the same as the one in neutral atoms. This result is in agreement with the estimates of recent theoretical considerations on the EC-decay of few-electron ions that explicitly take into account the conservation of the total angular momentum of the nucleus plus lepton(s) system and its projections. No firm confirmation could be concluded from our results on the predicted effect that allowed Gamow-Teller transitions become forbidden if the initial and final total angular momenta are not equal.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epja/i2012-12022-9DOI ID：10.1140/epja/i2012-12022-9,
ISSN：1434-6001,
Web of Science ID：WOS:000300898300002 Interaction cross sections for Ne isotopes towards the island of inversion and halo structures of 29Ne and 31Ne M. Takechi; T. Ohtsubo; M. Fukuda; D. Nishimura; T. Kuboki; T. Suzuki; T. Yamaguchi; A. Ozawa; T. Moriguchi; H. Ooishi; D. Nagae; H. Suzuki; S. Suzuki; T. Izumikawa; T. Sumikama; M. Ishihara; H. Geissel; N. Aoi; Rui-Jiu Chen; De-Qing Fang; N. Fukuda; I. Hachiuma; N. Inabe; Y. Ishibashi; Y. Ito; D. Kameda; T. Kubo; K. Kusaka; M. Lantz; Yu-Gang Ma; K. Matsuta; M. Mihara; Y. Miyashita; S. Momota; K. Namihira; M. Nagashima; Y. Ohkuma; T. Ohnishi; M. Ohtake; K. Ogawa; H. Sakurai; Y. Shimbara; T. Suda; H. Takeda; S. Takeuchi; K. Tanaka; R. Watanabe; M. Winkler; Y. Yanagisawa; Y. Yasuda; K. Yoshinaga; A. Yoshida; K. Yoshida
Physics Letters B,
巻：707,
号：3-4,
開始ページ：357,
終了ページ：361, 2012年02月,
［査読有り］Interaction cross sections (sigma(1)) for Me isotopes from the stability line to the vicinity of the neutron drip line have been measured at around 240 MeV/nucleon using BigRIPS at RIBF, RIKEN, The sigma(1) for Ne27-32 in every case exceed the systematic mass-number dependence of sigma(1) for stable nuclei, which can be explained by considering the nuclear deformation. In particular the sigma(1) for Ne-29 and Ne-31 are significantly greater than those of their neighboring nuclides. These enhancements of sigma(1) for Ne-29 and Ne-31 cannot be explained by a single-particle model calculation under the assumption that the valence neutron of Ne-29 (Ne-31) occupies the 0d(3/2) (0f(7/2)) orbital, as expected from the standard spherical shell ordering. The present data suggest an s dominant halo structure of Ne-29 and s- or p-orbital halo in Ne-31. (C) 2011 Elsevier B.V. All rights reserved.
Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2011.12.028DOI ID：10.1016/j.physletb.2011.12.028,
ISSN：0370-2693,
eISSN：1873-2445,
Web of Science ID：WOS:000300134500005 One- and two-neutron removal reactions from C-19,C-20 with a proton target A. Ozawa; Y. Hashizume; Y. Aoki; K. Tanaka; T. Aiba; N. Aoi; H. Baba; B. A. Brown; M. Fukuda; K. Inafuku; N. Iwasa; T. Izumikawa; K. Kobayashi; M. Komuro; Y. Kondo; T. Kubo; M. Kurokawa; T. Matsuyama; S. Michimasa; T. Motobayashi; T. Nakabayashi; S. Nakajima; T. Nakamura; T. Ohtsubo; H. Sakurai; R. Shinoda; M. Shinohara; H. Suzuki; T. Suzuki; M. Takechi; E. Takeshita; S. Takeuchi; Y. Togano; K. Yamada; T. Yamaguchi; T. Yasuno; M. Yoshitake
PHYSICAL REVIEW C,
巻：84,
号：6, 2011年12月
One-and two-neutron removal reactions from C-19 and C-20 have been studied using a liquid-hydrogen target at 40A MeV. A small cross section has been observed in the one-neutron removal reaction from C-20. The observed inclusive removal cross sections are compared with theoretical removal cross sections calculated by using shell model spectroscopic factors and Glauber-model single-particle cross sections. The observed momentum distributions are also compared with those calculated by using continuum-discretized coupled-channel methods. Good consistency between theory and experiment is shown in the one-neutron removal reaction from C-19. However, our theoretical calculation fails to reproduce the neutron removal reactions from C-20, which suggests that further improvements of the theoretical descriptions are necessary.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.84.064315DOI ID：10.1103/PhysRevC.84.064315,
ISSN：0556-2813,
eISSN：1089-490X,
Web of Science ID：WOS:000298130800003 Production and Decay Properties of 264Hs and 265Hs Nozomi Sato; Hiromitsu Haba; Takatoshi Ichikawa; Daiya Kaji; Yuki Kudou; Kouji Morimoto; Kosuke Morita; Kazutaka Ozeki; Takayuki Sumita; Akira Yoneda; Eiji Ideguchi; Hiroyuki Koura; Akira Ozawa; Tsutomu Shinozuka; Takayuki Yamaguchi; Atsushi Yoshida
Journal of the Physical Society of Japan,
巻：80,
号：9,
開始ページ：094201,
終了ページ：094201, 2011年09月,
［査読有り］The decay properties of (264)Hs and (265)Hs produced in the Pb-207,Pb-208(Fe-58,xn) (x = 1, 2) reactions were studied using a gas-filled recoil ion separator at the linear accelerator facility of RIKEN. A total of six decay chains were assigned to (264)Hs. The cross sections of (264)Hs produced in the Pb-208(Fe-58,2n) and Pb-207(Fe-58,n) reactions were measured to be 2.8(-2.3)(+6.5) and 6.9(-3.1)(+4.4) pb, respectively. The isotope (264)Hs decayed by alpha-particle emission (five events) and spontaneous fission (one event). The alpha-particle energy of (264)Hs was observed at 10.61 +/- 0.04 and 10.80 +/- 0.08 MeV.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.80.094201DOI ID：10.1143/jpsj.80.094201,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000294478500017 Nuclear reactions of 19,20C on a liquid hydrogen target measured with the superconducting TOF spectrometer T. Yamaguchi; K. Tanaka; T. Suzuki; A. Ozawa; T. Ohtsubo; T. Aiba; N. Aoi; H. Baba; M. Fukuda; Y. Hashizume; K. Inafuku; N. Iwasa; T. Izumikawa; K. Kobayashi; M. Komuro; Y. Kondo; T. Kubo; M. Kurokawa; T. Matsuyama; S. Michimasa; T. Motobayashi; T. Nakabayashi; S. Nakajima; T. Nakamura; H. Sakurai; R. Shinoda; M. Shinohara; H. Suzuki; M. Takechi; E. Takeshita; S. Takeuchi; Y. Togano; K. Yamada; T. Yasuno; M. Yoshitake
Nuclear Physics A,
巻：864,
号：1,
開始ページ：1,
終了ページ：37, 2011年08月
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2011.05.095DOI ID：10.1016/j.nuclphysa.2011.05.095,
ISSN：0375-9474 Scaling of Charge-Changing Interaction Cross Sections and Point-Proton Radii of Neutron-Rich Carbon Isotopes T. Yamaguchi; I. Hachiuma; A. Kitagawa; K. Namihira; S. Sato; T. Suzuki; I. Tanihata; M. Fukuda
Physical Review Letters,
巻：107,
号：3,
開始ページ：032502,
終了ページ：032502, 2011年07月,
［査読有り］,
［国際誌］Charge-changing cross sections σ(cc) of stable and unstable nuclei ((9-11)Be, (14-16)C, and (16-18)O) on a carbon target were investigated at 300 MeV/nucleon. A phenomenological analysis based on the Glauber theory indicates an approximate, but universal, scaling of σ(cc) over a wide range of A/Z. This allows the determination of the density distributions of protons tightly bound in the nuclei. An application to (16)C, which is considered to be an anomalously deformed nucleus, indicates a systematic evolution of proton root-mean-square radii and has revealed for the first time a neutron skin effect in carbon isotopes. Being complementary to isotope-shift and electron-scattering experiments, the present method can open up a new approach to explore the structure of exotic nuclei.
American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.107.032502DOI ID：10.1103/physrevlett.107.032502,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280206,
PubMed ID：21838353 Test of the conserved vector current hypothesis by a β-ray angular distribution measurement in the mass-8 system T. Sumikama; K. Matsuta; T. Nagatomo; M. Ogura; T. Iwakoshi; Y. Nakashima; H. Fujiwara; M. Fukuda; M. Mihara; K. Minamisono; T. Yamaguchi; T. Minamisono
Physical Review C - Nuclear Physics,
巻：83,
号：6, 2011年06月,
［査読有り］The β-ray angular correlations for the spin alignments of Li8 and B8 have been observed in order to test the conserved vector current (CVC) hypothesis. The alignment correlation terms were combined with the known β-α angular correlation terms to determine all the matrix elements contributing to the correlation terms. The weak magnetism term, 7.5±0.2, deduced from the β-ray correlation terms was consistent with the CVC prediction 7.3±0.2, deduced from the analog-γ decay measurement based on the CVC hypothesis. However, there was no consistent CVC prediction for the second-forbidden term associated with the weak vector current. The experimental value for the second-forbidden term was 1.0±0.3, while the CVC prediction was 0.1±0.4 or 2.1±0.5. © 2011 American Physical Society.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.83.065501DOI ID：10.1103/PhysRevC.83.065501,
ISSN：1089-490X,
eISSN：2469-9993,
SCOPUS ID：79961057177,
Web of Science ID：WOS:000291463700002 Direct Mass Measurements of Short-LivedA=2Z−1NuclidesGe63,As65,Se67, andKr71and Their Impact on Nucleosynthesis in therpProcessTakayuki Yamaguchi
Physical Review Letters,
巻：106,
号：11, 2011年03月,
［査読有り］American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.106.112501DOI ID：10.1103/physrevlett.106.112501,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280216 Density distribution of Ne-17 and possible shell-structure change in the proton-rich sd-shell nuclei K. Tanaka; M. Fukuda; M. Mihara; M. Takechi; D. Nishimura; T. Chinda; T. Sumikama; S. Kudo; K. Matsuta; T. Minamisono; T. Suzuki; T. Ohtsubo; T. Izumikawa; S. Momota; T. Yamaguchi; T. Onishi; A. Ozawa; I. Tanihata; T. Zheng
PHYSICAL REVIEW C,
巻：82,
号：4, 2010年10月,
［査読有り］Reaction cross sections (sigma(R)) for the proton drip-line nucleus Ne-17 have been measured on Be-9, C-12, and Al-27 targets at 64 and 42 MeV/nucleon by the transmission method. From the energy dependence of the sigma(R) including the high energy data, the density distribution of Ne-17 was deduced through a modified Glauber-type calculation. It is indicated that Ne-17 has a long tail in the density, consistent with a (2s(1/2))(2)-dominant configuration of two valence protons.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.82.044309DOI ID：10.1103/PhysRevC.82.044309,
ISSN：0556-2813,
eISSN：1089-490X,
Web of Science ID：WOS:000282873100003 Discovery and investigation of heavy neutron-rich isotopes with time-resolved Schottky spectrometry in the element range from thallium to actinium L. Chen; W.R. Plaß; H. Geissel; R. Knöbel; C. Kozhuharov; Yu.A. Litvinov; Z. Patyk; C. Scheidenberger; K. Siegień-Iwaniuk; B. Sun; H. Weick; K. Beckert; P. Beller; F. Bosch; D. Boutin; L. Caceres; J.J. Carroll; D.M. Cullen; I.J. Cullen; B. Franzke; J. Gerl; M. Górska; G.A. Jones; A. Kishada; J. Kurcewicz; S.A. Litvinov; Z. Liu; S. Mandal; F. Montes; G. Münzenberg; F. Nolden; T. Ohtsubo; Zs. Podolyák; R. Propri; S. Rigby; N. Saito; T. Saito; M. Shindo; M. Steck; P. Ugorowski; P.M. Walker; S. Williams; M. Winkler; H.-J. Wollersheim; T. Yamaguchi
Physics Letters B,
巻：691,
号：5,
開始ページ：234,
終了ページ：237, 2010年08月,
［査読有り］Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2010.05.078DOI ID：10.1016/j.physletb.2010.05.078,
ISSN：0370-2693 Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon Tetsuya Ohnishi; Toshiyuki Kubo; Kensuke Kusaka; Atsushi Yoshida; Koichi Yoshida; Masao Ohtake; Naoki Fukuda; Hiroyuki Takeda; Daisuke Kameda; Kanenobu Tanaka; Naohito Inabe; Yoshiyuki Yanagisawa; Yasuyuki Gono; Hiroshi Watanabe; Hideaki Otsu; Hidetada Baba; Takashi Ichihara; Yoshitaka Yamaguchi; Maya Takechi; Shunji Nishimura; Hideki Ueno; Akihiro Yoshimi; Hiroyoshi Sakurai; Tohru Motobayashi; Taro Nakao; Yutaka Mizoi; Masafumi Matsushita; Kazuo Ieki; Nobuyuki Kobayashi; Kana Tanaka; Yosuke Kawada; Naoki Tanaka; Shigeki Deguchi; Yoshiteru Satou; Yosuke Kondo; Takashi Nakamura; Kenta Yoshinaga; Chihiro Ishii; Hideakira Yoshii; Yuki Miyashita; Nobuya Uematsu; Yasutsugu Shiraki; Toshiyuki Sumikama; Junsei Chiba; Eiji Ideguchi; Akito Saito; Takayuki Yamaguchi; Isao Hachiuma; Takeshi Suzuki; Tetsuaki Moriguchi; Akira Ozawa; Takashi Ohtsubo; Michael A. Famiano; Hans Geissel; Anthony S. Nettleton; Oleg B. Tarasov; Daniel P. Bazin; Bradley M. Sherrill; Shashikant L. Manikonda; Jerry A. Nolen
Journal of the Physical Society of Japan,
巻：79,
号：7,
開始ページ：073201,
終了ページ：073201, 2010年07月,
［査読有り］A search for new isotopes using in-flight fission of a 345 MeV/nucleon U-238 beam has been carried out at the RI Beam Factory at the RIKEN Nishina Center. Fission fragments were analyzed and identified by using the superconducting in-flight separator BigRIPS. We observed 45 new neutron-rich isotopes: Mn-71, Fe-73,Fe-74, Co-76, Ni-79, Cu-81,Cu-82, Zn-84,Zn-85, Ga-87, Ge-90, Se-95, Br-98, Kr-101, Rb-103, Sr-106,Sr-107, Y-108,Y-109, Zr-111,Zr-112, Nb-114,Nb-115, Mo-115,Mo-116,Mo-117, Tc-119,Tc-120, (121,122,123),Ru-124, Rh-123,Rh-124,Rh-125,Rh-126, Pd-127,Pd-128, Cd-133, Sn-138, Sb-140, Te-143, I-145, Xe-148, and Ba-152.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.79.073201DOI ID：10.1143/jpsj.79.073201,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000280096900004 Energy-dependent charge-changing cross sections and proton distribution of Si-28 T. Yamaguchi; M. Fukuda; S. Fukuda; G. W. Fan; I. Hachiuma; M. Kanazawa; A. Kitagawa; T. Kuboki; M. Lantz; M. Mihara; M. Nagashima; K. Namihira; D. Nishimura; Y. Okuma; T. Ohtsubo; S. Sato; T. Suzuki; M. Takechi; W. Xu
PHYSICAL REVIEW C,
巻：82,
号：1, 2010年07月,
［査読有り］The charge-changing cross sections (sigma(cc)) of Si-28 on a carbon target were measured with high precision at intermediate energies from 100 to 600 MeV/nucleon. The measured scc decreases rapidly from low energies up to 200 MeV/nucleon, whereas at higher energies it appears almost constant. The energy dependence of scc is compared with a Glauber-type model calculation where only the proton distribution of Si-28 is taken into account. A phenomenological correction factor deduced from the present data satisfactorily reproduces the experimental scc for other stable nuclei, whose charge distributions were determined by electron scattering and muon capture experiments.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.82.014609DOI ID：10.1103/PhysRevC.82.014609,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000279776000005 EXOTIC NUCLEAR STRUCTURES OF LIGHT UNSTABLE NUCLEI VIA REACTION CROSS SECTION MEASUREMENT D. Nishimura; M. Fukuda; M. Takechi; M. Mihara; J. Komurasaki; R. Matsumiya; K. Matsuta; I. Hachimuma; T. Kuboki; M. Miura; S. Nakajima; K. Namihira; K. Saito; T. Suzuki; T. Yamaguchi; M. Yoshitake; M. Nagashima; Y. Ohkuma; T. Ohtsubo; Y. Shinbara; R. Watanabe; T. Izumikawa; M. Lantz; K. Tanaka; T. Suda; T. Moriguchi; A. Ozawa; D. Ishikawa; Y. Yasuda; S. Momota; S. Fukuda; M. Kanazawa; A. Kitagawa; S. Sato
MODERN PHYSICS LETTERS A,
巻：25,
号：21-23,
開始ページ：2014,
終了ページ：2015, 2010年07月,
［査読有り］Reaction cross sections for (11)Be and (8)B on proton targets at 40A - 120A MeV have been measured by the transmission method. With these data, we can discuss the proton-and neutron-density distributions at the nuclear surface independently in principle using the Glauber theory. Our experimental results support that the constituent of halo in (11)Be is neutron dominantly and that of (8)B is proton dominantly.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1142/S0217732310000915DOI ID：10.1142/S0217732310000915,
ISSN：0217-7323,
Web of Science ID：WOS:000280050200071 Direct measurement of the 4.6 MeV isomer in stored bare 133Sb ions B. Sun; R. Knöbel; H. Geissel; Yu.A. Litvinov; P.M. Walker; K. Blaum; F. Bosch; D. Boutin; C. Brandau; L. Chen; I.J. Cullen; A. Dolinskii; B. Fabian; M. Hausmann; C. Kozhuharov; J. Kurcewicz; S.A. Litvinov; Z. Liu; M. Mazzocco; J. Meng; F. Montes; G. Münzenberg; A. Musumarra; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W.R. Plaß; C. Scheidenberger; M. Steck; T. Suzuki; H. Weick; N. Winckler; M. Winkler; T. Yamaguchi
Physics Letters B,
巻：688,
号：4-5,
開始ページ：294,
終了ページ：297, 2010年05月,
［査読有り］The core-excited isomer in fully-ionized Sb-133 has been directly studied for the first time by applying the novel technique of isochronous mass spectrometry at GSI. The neutron-rich nuclides in high charge states were produced by projectile fission of 411 MeV A U-238 ions, separated in flight by the fragment separator (FRS) and stored in the isochronous storage ring (ESR). The measured excitation energy is 4.56(10) MeV. The neutral-atom half-life is known to be 17 mu s. This is the shortest-lived isomer measured directly with mass spectrometry techniques. The extended in-flight half-life of the bare ions in the ESR, which is due to the exclusion of the strong internal conversion, demonstrates that there should be another nuclear level above that identified from isomer-decay spectroscopy, in support of shell-model calculations. This measurement opens up a new half-life domain for storage-ring measurements. (c) 2010 Elsevier B.V. All rights reserved.
Elsevier BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2010.04.020DOI ID：10.1016/j.physletb.2010.04.020,
ISSN：0370-2693,
Web of Science ID：WOS:000278242600008 Measurements of nuclear radii for neutron-rich Ne isotopes Ne28-32 M. Takechi; T. Ohtsubo; T. Kuboki; M. Fukuda; D. Nishimura; T. Suzuki; T. Yamaguchi; A. Ozawa; T. Moriguchi; T. Sumikama; H. Geissel; N. Aoi; N. Fukuda; I. Hachiuma; N. Inabe; Y. Ishibashi; Y. Itoh; D. Kameda; K. Kusaka; M. Lantz; M. Mihara; Y. Miyashita; S. Momota; K. Namihira; H. Ohishi; Y. Ohkuma; T. Ohnishi; M. Ohtake; K. Ogawa; Y. Shimbara; T. Suda; S. Suzuki; H. Takeda; K. Tanaka; R. Watanabe; M. Winkler; Y. Yanagisawa; Y. Yasuda; K. Yoshinaga; A. Yoshida; K. Yoshida; T. Kubo
NUCLEAR PHYSICS A,
巻：834,
号：1-4,
開始ページ：412C,
終了ページ：415C, 2010年03月,
［査読有り］Interaction cross sections (sigma(I)) for neutron-rich Ne isotopes, Ne28-32 on C target have been measured at 240A MeV using the RIBF at RIKEN. A large enhancement of sigma(I) beyond the systematics of stable nuclei have been observed for neutron-rich Ne isotopes, particularly for Ne-31. The possible halo structure for Ne-29,Ne-31 which would be caused by the lowering of the pf-shell and nuclear deformation of Ne isotopes are discussed by the preliminary analysis.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2010.01.052DOI ID：10.1016/j.nuclphysa.2010.01.052,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000275930800104 Directional correlation of nuclear-collision probability for aligned beams of deformed nucleus M. Fukuda; D. Nishimura; M. Takechi; M. Mihara; K. Matsuta; R. Matsumiya; T. Kuboki; K. Namihira; I. Hachiuma; T. Yamaguchi; T. Suzuki; Y. Okuma; M. Nagashima; T. Ohtsubo; Y. Shimbara; T. Izumikawa; K. Tanaka; T. Suda; S. Momota; T. Minamisono; W. Xu; G. W. Fan; S. Fukuda; S. Sato; M. Kanazawa; A. Kitagawa
NUCLEAR PHYSICS A,
巻：834,
号：1-4,
開始ページ：461C,
終了ページ：463C, 2010年03月,
［査読有り］Interaction cross sections have been measured for spin-aligned nuclear beams of deformed nucleus. The spin-aligned nuclear beams were created by selecting the momentum of fragments produced in the projectile fragmentation of intermediate energy heavy-ion beams. The directional correlation of nuclear reaction probability for heavy-ion beams of deformed nucleus has been directly observed for the first time.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2010.01.064DOI ID：10.1016/j.nuclphysa.2010.01.064,
ISSN：0375-9474,
Web of Science ID：WOS:000275930800116 Distinction between Proton-Neutron Density Distribution of Halo Nuclei at the Nuclear Surface via Reaction Cross Sections D. Nishimura; M. Fukuda; M. Takechi; M. Mihara; D. Ishikawa; J. Komurasaki; K. Matsuta; R. Matsumiya; T. Kuboki; M. Yoshitake; T. Suzuki; T. Yamaguchi; S. Nakajima; K. Saito; M. Miura; I. Hachiuma; K. Namihira; T. Ohtsubo; Y. Shimbara; R. Watanabe; Y. Ohkuma; T. Izumikawa; K. Tanaka; T. Suda; A. Ozawa; Y. Yasuda; T. Moriguchi; S. Momota; S. Fukuda; S. Sato; M. Kanazawa; A. Kitagawa
NUCLEAR PHYSICS A,
巻：834,
号：1-4,
開始ページ：470C,
終了ページ：472C, 2010年03月,
［査読有り］Reaction cross sections (sigma(R)) for Be-11 and B-8 on proton targets at 50A similar to 120A MeV have been measured to distinguish between the proton- and neutron- density distributions at the nuclear surface. The sigma(R) is connected with the nucleon density distributions by the Glauber theory. Since the nucleon-nucleon total cross sections in that energy region have a large isospin dependence, the sigma(R) on proton targets should have a large difference between the proton and neutron in the halo structure. The experimental sigma(R) on proton targets are in good agreement with the calculated ones assuming that the tail dominantly consists of a neutron for Be-11 and a proton for B-8.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2010.01.067DOI ID：10.1016/j.nuclphysa.2010.01.067,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000275930800119 Observation of a Large Reaction Cross Section in the Drip-Line Nucleus C22 K. Tanaka; T. Yamaguchi; T. Suzuki; T. Ohtsubo; M. Fukuda; D. Nishimura; M. Takechi; K. Ogata; A. Ozawa; T. Izumikawa; T. Aiba; N. Aoi; H. Baba; Y. Hashizume; K. Inafuku; N. Iwasa; K. Kobayashi; M. Komuro; Y. Kondo; T. Kubo; M. Kurokawa; T. Matsuyama; S. Michimasa; T. Motobayashi; T. Nakabayashi; S. Nakajima; T. Nakamura; H. Sakurai; R. Shinoda; M. Shinohara; H. Suzuki; E. Takeshita; S. Takeuchi; Y. Togano; K. Yamada; T. Yasuno; M. Yoshitake
Physical Review Letters,
巻：104,
号：6,
開始ページ：062701,
終了ページ：062701, 2010年02月,
［査読有り］,
［国際誌］Reaction cross sections (sigma(R)) for 19C, 20C and the drip-line nucleus 22C on a liquid hydrogen target have been measured at around 40A MeV by a transmission method. A large enhancement of sigma(R) for 22C compared to those for neighboring C isotopes was observed. Using a finite-range Glauber calculation under an optical-limit approximation the rms matter radius of 22C was deduced to be 5.4+/-0.9 fm. It does not follow the systematic behavior of radii in carbon isotopes with N < or = 14, suggesting a neutron halo. It was found by an analysis based on a few-body Glauber calculation that the two-valence neutrons in 22C preferentially occupy the 1s(1/2) orbital.
American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.104.062701DOI ID：10.1103/physrevlett.104.062701,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280232,
PubMed ID：20366816 MEASUREMENTS OF INTERACTION CROSS SECTIONS TOWARDS NEUTRON-RICH Ne ISOTOPES AT RIBF M. Takechi; T. Ohtsubo; T. Kuboki; M. Fukuda; D. Nishimura; T. Suzuki; T. Yamaguchi; A. Ozawa; T. Moriguchi; T. Sumikama; H. Geissel; N. Aoi; N. Fukuda; I. Hachiuma; N. Inabe; Y. Ishibashi; Y. Itoh; D. Kameda; T. Kubo; K. Kusaka; M. Lantz; M. Mihara; Y. Miyashita; S. Momota; K. Namihira; H. Ohishi; Y. Ohkuma; T. Ohnishi; M. Ohtake; K. Ogawa; Y. Shimbara; T. Suda; S. Suzuki; H. Takeda; K. Tanaka; R. Watanabe; M. Winkler; Y. Yanagisawa; Y. Yasuda; K. Yoshinaga; A. Yoshida; K. Yoshida
Modern Physics Letters A,
巻：25,
開始ページ：1878-1881, 2010年
DOI：https://doi.org/10.1142/S021773231000054XDOI ID：10.1142/S021773231000054X,
ISSN：0217-7323 Energy-dependent charge-changing cross sections and proton distribution of Si28T. Yamaguchi; M. Fukuda; S. Fukuda; G. W. Fan; I. Hachiuma; M. Kanazawa; A. Kitagawa; T. Kuboki; M. Lantz; M. Mihara; M. Nagashima; K. Namihira; D. Nishimura; Y. Okuma; T. Ohtsubo; S. Sato; T. Suzuki; M. Takechi; W. Xu
Physical Review C - Nuclear Physics,
巻：82,
号：1, 2010年,
［査読有り］The charge-changing cross sections (σcc) of Si28 on a carbon target were measured with high precision at intermediate energies from 100 to 600MeV/nucleon. The measured σcc decreases rapidly from low energies up to 200MeV/nucleon, whereas at higher energies it appears almost constant. The energy dependence of σcc is compared with a Glauber-type model calculation where only the proton distribution of Si28 is taken into account. A phenomenological correction factor deduced from the present data satisfactorily reproduces the experimental σcc for other stable nuclei, whose charge distributions were determined by electron scattering and muon capture experiments. © 2010 The American Physical Society.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.82.014609DOI ID：10.1103/PhysRevC.82.014609,
ISSN：1089-490X,
SCOPUS ID：77954651404 Decay curve study in a standard electron capture decay D. Nishimura; M. Fukuda; T. Izumikawa; K. Kisamori; Y. Kuwada; K. Makisaka; R. Matsumiya; K. Matsuta; M. Mihara; T. Ohtsubo; T. Suzuki; A. Takagi; T. Yamaguchi; R. Yokoyama
NUCLEAR PHYSICS TRENDS,
巻：1235,
開始ページ：219,
終了ページ：+, 2010年
We have searched for a time-modulated decay in a standard electron capture experiment for (140)pr in order to confirm a report from GSI, where an oscillatory decay has been observed for hydrogen-like Pr-140 and Pm-142 ions in the cooler storage ring. Pr-140 has been produced with the Ce-140(p, n) reaction by a pulsed proton beam accelerated from the Van de Graaff accelerator at Osaka University. Resultant time dependence of the k(alpha) and K-beta X-ray intensities from the daughter shows no oscillatory behavior.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.3442597DOI ID：10.1063/1.3442597,
ISSN：0094-243X,
SCOPUS ID：77954614798,
Web of Science ID：WOS:000282996300035 Decay Properties of 266Bh and 262Db Produced in the 248Cm + 23Na Reaction Morita Kosuke; Morimoto Kouji; Kaji Daiya; Haba Hiromitsu; Ozeki Kazutaka; Kudou Yuki; Sato Nozomi; Sumita Takayuki; Yoneda Akira; Ichikawa Takatoshi; Fujimori Yasuyuki; Goto Sin-ichi; Ideguchi Eiji; Kasamatsu Yoshitaka; Katori Kenji; Komori Yukiko; Koura Hiroyuki; Kudo Hisaaki; Ooe Kazuhiro; Ozawa Akira; Tokanai Fuyuki; Tsukada Kazuaki; Yamaguchi Takayuki; Yoshida Atsushi
Journal of the Physical Society of Japan,
巻：78,
号：6,
開始ページ：064201,
終了ページ：064201, 2009年06月,
［査読有り］Decay properties of an isotope 266Bh and its daughter nucleus 262Db produced by the 248Cm(23Na,5n) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. 266Bh was clearly identified from the correlation of the known nuclide, 262Db. The obtained decay properties of 266Bh and 262Db are consistent with those observed in the 278113 chain, which provided further confirmation of the discovery of 278113.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.78.064201DOI ID：10.1143/jpsj.78.064201,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：10025961056,
CiNii Books ID：AA00704814 Reaction cross sections at intermediate energies and Fermi-motion effect M. Takechi; M. Fukuda; M. Mihara; K. Tanaka; T. Chinda; T. Matsumasa; M. Nishimoto; R. Matsumiya; Y. Nakashima; H. Matsubara; K. Matsuta; T. Minamisono; T. Ohtsubo; T. Izumikawa; S. Momota; T. Suzuki; T. Yamaguchi; R. Koyama; W. Shinozaki; M. Takahashi; A. Takizawa; T. Matsuyama; S. Nakajima; K. Kobayashi; M. Hosoi; T. Suda; M. Sasaki; S. Sato; M. Kanazawa; A. Kitagawa
PHYSICAL REVIEW C,
巻：79,
号：6, 2009年06月,
［査読有り］Precise measurements of the reaction cross sections (sigma(R)) for C-12 on Be, C, and Al targets and Be-11 on Be targets were performed in the energy range between 30 and 400 MeV/nucleon. The energy dependencies of sigma(R) for C-12, Be-11, and B-8 were compared to Glauber-type calculations performed using reliable nucleon-density distributions that are supported by experimental data. It was found that the Glauber-type calculations, which include the higher-order multiple scattering effect, the finite-range effect, and the Fermi-motion effect of nucleons in the nucleus, seem to provide a good prescription relating sigma(R) at intermediate energies to a proper nucleon-density distribution. This method provides a powerful tool with which to study the nuclear surface structure through the sigma(R) measurements.</p>.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.79.061601DOI ID：10.1103/PhysRevC.79.061601,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000267701200005 Publisher's Note: Schottky Mass Measurement of the Hg-208 Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic Pb-208 [Phys. Rev. Lett. 102, 122503 (2009)] L. Chen; Yu. A. Litvinov; W. R. Plass; K. Beckert; P. Beller; F. Bosch; D. Boutin; L. Caceres; R. B. Cakirli; J. J. Carroll; R. F. Casten; R. S. Chakrawarthy; D. M. Cullen; I. J. Cullen; B. Franzke; H. Geissel; J. Gerl; M. Gorska; G. A. Jones; A. Kishada; R. Knoebel; C. Kozhuharov; S. A. Litvinov; Z. Liu; S. Mandal; F. Montes; G. Muenzenberg; F. Nolden; T. Ohtsubo; Z. Patyk; Zs. Podolyak; R. Propri; S. Rigby; N. Saito; T. Saito; C. Scheidenberger; M. Shindo; M. Steck; P. Ugorowski; P. M. Walker; S. Williams; H. Weick; M. Winkler; H. -J. Wollersheim; T. Yamaguchi
PHYSICAL REVIEW LETTERS,
巻：102,
号：13, 2009年04月,
［査読有り］AMER PHYSICAL SOC, 英語
DOI：https://doi.org/10.1103/PhysRevLett.102.139904DOI ID：10.1103/PhysRevLett.102.139904,
ISSN：0031-9007,
Web of Science ID：WOS:000264888600084 Production and Decay Properties of 263Hs Daiya Kaji; Kouji Morimoto; Nozomi Sato; Takatoshi Ichikawa; Eiji Ideguchi; Kazutaka Ozeki; Hiromitsu Haba; Hiroyuki Koura; Yuki Kudou; Akira Ozawa; Takayuki Sumita; Takayuki Yamaguchi; Akira Yoneda; Atsushi Yoshida; Kosuke Morita
Journal of the Physical Society of Japan,
巻：78,
号：3,
開始ページ：035003,
終了ページ：035003, 2009年03月,
［査読有り］Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.78.035003DOI ID：10.1143/jpsj.78.035003,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000264596000053 LARGE-SCALE MASS MEASUREMENTS OF SHORT-LIVED NUCLIDES WITH THE ISOCHRONOUS MASS SPECTROMETRY AT GSI B. Sun; R. Knoebel; Yu A. Litvinov; S. Nakajima; H. Geissel; J. Meng; K. Beckert; F. Bosch; D. Boutin; C. Brandau; L. Chen; I. J. Cullen; C. Dimopoulou; B. Fabian; M. Hausmann; O. Klepper; C. Kozhuharov; J. Kurcewicz; S. A. Litvinov; M. Mazzocco; F. Montes; G. Muenzenberg; A. Musumarra; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W. R. Plass; C. Scheidenberger; M. Steck; T. Suzuki; P. M. Walker; H. Weick; N. Winckler; M. Winkler; T. Yamaguchi
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS,
巻：18,
号：2,
開始ページ：346,
終了ページ：351, 2009年02月,
［査読有り］Precise mass measurements of short-lived exotic nuclei are very important for the understanding of basic nuclear structure physics and astrophysical nucleosynthesis in nature, as well as for the test and the development of theoretical nuclear mass models. At GSI, the Isochronous Mass Spectrometry (IMS) dedicated to mass measurements of short-lived nuclides was developed. In this contribution, the IMS technique is briefly reviewed. Recently, the first large-scale measurement on the (238)U fission fragment was done successfully. The measured mass values are in excellent agreement with the recent Penning trap data, however, they show a systematical deviation from the values in the latest atomic mass evaluation. Some representative results from this experiment will be presented, including their impact on nuclear structure physics and astrophysical r-process nucleosynthesis.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1142/S0218301309012379DOI ID：10.1142/S0218301309012379,
ISSN：0218-3013,
Web of Science ID：WOS:000265091500019 PRESENT STATUS OF RARE-RI RING PROJECT IN RIKEN RIBF Y. Yasuda; A. Ozawa; I. Arai; T. Fujinawa; N. Fukunishi; T. Ohnishi; A. Goto; K. Y. Hara; H. Sakurai; M. Wakasugi; Y. Yamaguchi; Y. Yano; T. Suzuki; T. Yamaguchi; T. Kkikuchi; T. Ohtsubo
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS,
巻：18,
号：2,
開始ページ：459,
終了ページ：464, 2009年02月,
［査読有り］We are going to construct a precise mass-measurement apparatus; "Rare-RI Ring" at RIKEN RI Beam Factory and measure masses of exotic neutron-rich nuclei far from the stability line with the assistance of high intensity primary beam from the cyclotrons at RIBF. The present status of our project and the progress of some parts of Rare-RI Ring will be presented.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1142/S0218301309012501DOI ID：10.1142/S0218301309012501,
ISSN：0218-3013,
eISSN：1793-6608,
ORCID：42765815,
Web of Science ID：WOS:000265091500032 BEAM OPTICS SIMULATION OF RARE-RI RING AT RI BEAM FACTORY IN RIKEN I. Arai; A. Ozawa; Y. Yasuda; T. Fujinawa; N. Fukunishi; T. Ohnishi; A. Goto; K. Y. Hara; H. Sakurai; M. Wakasugi; Y. Yamaguchi; Y. Yano; T. Suzuki; T. Yamaguchi; T. Kikuchi; T. Ohtsubo
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS,
巻：18,
号：2,
開始ページ：498,
終了ページ：504, 2009年02月,
［査読有り］The cyclotron-like storage ring dedicated to Rare-RI Ring project consists of 6 magnetic sectors and 6 straight sections, having a circumference of 56.13 m. The magnetic sector works for both bending and focusing. The total circulation is assumed to be 1,000 turns. Over the momentum range from 1% to +1% in Delta p/p, the required isochronisity is 10(-6) while the beam emittance is sevaral tens of pi mm-mrad. To examine the design of cyclotron-like storage ring and fix its parameters, we have developed a high precision beam optics simulation. To achieve the precision as high as possible with in a feasible computational time, we have adopted a geometrical tracking assuming a circular orbit for a small spatial segment. For that purpose, it is enough that the magnetic sector is divided into 150 sub-sectors in calculation. In each sub-sector, the magnetic field is given as a function of radial position but uniform around the vicinity of beam trajectory. The beam trajectory is evaluated in 4th order Runge-Kutta algorithm. Finally, we have achieved a precision of 10(-9) in Delta T/T and a computational time of 1.8 sec on atypical PC server for ray tracing of single particle undergoing a circulation of 1,000 turns.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1142/S0218301309012550DOI ID：10.1142/S0218301309012550,
ISSN：0218-3013,
ORCID：42765800,
Web of Science ID：WOS:000265091500037 Electron Screening Effects on alpha-decay A. Musumarra; F. Farinon; C. Nociforo; H. Geissel; G. Baur; K-H. Behr; A. Bonasera; F. Bosch; D. Boutin; A. Bruenle; L. Chen; A. Del Zoppo; C. Dimopoulou; A. Di Pietro; T. Faestermann; P. Figuera; K. Hagino; R. Janik; C. Karagiannis; P. Kienle; S. Kimura; R. Knoebel; I. Kojouharov; C. Kozhuharov; T. Kuboki; J. Kurcewicz; N. Kurz; K. Langanke; M. Lattuada; S. A. Litvinov; Yu. A. Litvinov; G. Martinez-Pinedo; M. Mazzocco; F. Montes; Y. Motizuki; F. Nolden; T. Ohtsubo; Y. Okuma; Z. Patyk; M. G. Pellegriti; W. Plass; S. Pietri; Z. Podolyak; A. Prochazka; C. Scheidenberger; V. Scuderi; B. Sitar; M. Steck; P. Strmen; B. Sun; T. Suzuki; I. Szarka; D. Torresi; H. Weick; J. S. Winfield; M. Winkler; H. J. Wollersheim; T. Yamaguchi
NUCLEAR STRUCTURE AND DYNAMICS '09,
巻：1165,
開始ページ：415,
終了ページ：+, 2009年,
［査読有り］An open problem in Nuclear Astrophysics concerns the understanding of electron-screening effects on nuclear reaction rates at stellar energies. In this framework, we have proposed to investigate the influence of the electron cloud on alpha-decay by measuring Q-values and alpha-decay half-lives of fully stripped, H-like and He-like ions. These kinds of measurements have been feasible just recently for highly-charged radioactive nuclides by fragmentation of U-238 at relativistic energies at the FRS-ESR facility at GSI. In this way it is possible to produce, efficiently separate and store highly-charged alpha-emitters. Candidates for the proposed investigation were carefully selected and will be studied by using the Schottky Mass Spectroscopy technique.
In order to establish a solid reference data set, lifetimes and Q(alpha)-value measurements of the corresponding neutrals have been performed directly at the FRS, by implanting the separated ions into an active Silicon stopper.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.3232139DOI ID：10.1063/1.3232139,
ISSN：0094-243X,
Web of Science ID：WOS:000273246000102 Nuclear structure studies of short-lived neutron-rich nuclei with the novel large-scale isochronous mass spectrometry at the FRS-ESR facility B. Sun; R. Knoebel; Yu. A. Litvinov; H. Geissel; J. Meng; K. Beckert; F. Bosch; D. Boutin; C. Brandau; L. Chen; I. J. Cullen; C. Dimopoulou; B. Fabian; M. Hausmann; C. Kozhuharov; S. A. Litvinov; M. Mazzocco; F. Montes; G. Muenzenberg; A. Musumarra; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W. R. Plass; C. Scheidenberger; M. Steck; T. Suzuki; P. M. Walker; H. Weick; N. Winckler; M. Winkler; T. Yamaguchi
NUCLEAR PHYSICS A,
巻：812,
開始ページ：1,
終了ページ：12, 2008年11月,
［査読有り］The previously pioneered Isochronous Mass Spectrometry (IMS) has been extended by an additional precise magnetic-rigidity determination to enable accurate large-scale measurements of stored short-lived relativistic nuclei with the FRS-ESR facility at 382 MeV/u. With this novel experimental tool the mass resolving power and accuracy have been improved by a factor of about 3. The recorded broad-band revolution time spectrum corresponds to the mass-over-charge range of about 6%. A mass resolving power of 200 000 (FWHM) and a typical accuracy of 120 keV have been achieved almost over the entire spectrum. The masses of 35 neutron-rich nuclides have been directly measured in the element range from aluminum to barium. The Masses of 8 nuclides (As-85,As-86, Se-89, Ag-123, Te-138, I-140,I-141, Xe-143) have been measured for the first time. The results are compared with previous experimental data and theoretical predictions. The evolution of the N = 50 shell closure towards doubly-magic Ni-78 is discussed. (c) 2008 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2008.08.013DOI ID：10.1016/j.nuclphysa.2008.08.013,
ISSN：0375-9474,
Web of Science ID：WOS:000260930500001 Measurement of the reaction cross section of (18)C and observations of fragments from (17)C and (18)C at 80A MeV A. Ozawa; D. Q. Fang; M. Fukuda; N. Iwasa; T. Izumikawa; H. Jeppesen; R. Kanungo; R. Koyama; T. Ohnishi; T. Ohtsubo; W. Shinozaki; T. Suda; T. Suzuki; M. Takahashi; I. Tanihata; C. Wu; Y. Yamaguchi
PHYSICAL REVIEW C,
巻：78,
号：5, 2008年11月,
［査読有り］The one- and two-neutron removal reactions from (17)C and (18)C as well as the reaction cross section of (18)C have been studied using a carbon target at 80A MeV. The longitudinal momentum distributions of (15,16)C fragments from (17)C and (16,17)C fragments from (18)C were measured by a direct time-of-flight method. The width of (15)C fragments from (17)C is fairly smaller than that from other C isotopes. The experimental data are discussed within the framework of the Glauber model.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.78.054313DOI ID：10.1103/PhysRevC.78.054313,
ISSN：0556-2813,
eISSN：1089-490X,
Web of Science ID：WOS:000261214200022 Studies on the exotic structure of Al-23
Fang De-Qing; Guo Wei; Ma Chun-Wang; Wang Kun; Yan Ting-Zhi; Ma Yu-Gang; Cai Xiang-Zhou; Shen Wen-Qing; Ren Zhong-Zhou; Sun Zhi-Yu; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; A. Ozawa; T. Suda; K. Sugawara; T. Suzuki; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
CHINESE PHYSICS C, 巻：32, 開始ページ：34, 終了ページ：37, 2008年10月
The longitudinal momentum distribution (P-//) of fragments after one-proton removal from Al-23 and reaction cross sections (sigma(R)) for Al-23,Al-24 on carbon target at 74A MeV have been measured simultaneously. An enhancement in sigma(R) is observed for Al-23 compaxed with Al-24. The full width at half maximum of the P-// distribution for Mg-22 fragments has been determined to be 232 +/- 28 MeV/c. Analysis of P-// using the Few-Body Glauber Model indicates a dominant d-wave configuration for the valence proton in the ground state of Al-23. The exotic structure in Al-23 is discussed.
CHINESE PHYSICAL SOC, 英語, 研究論文（学術雑誌）
ISSN：1674-1137, eISSN：2058-6132, Web of Science ID：WOS:000261998300009
Identification of New Isotopes 125Pd and126Pd Produced by In-Flight Fission of 345 MeV/nucleon 238U: First Results from the RIKEN RI Beam Factory Tetsuya Ohnishi; Toshiyuki Kubo; Kensuke Kusaka; Atsushi Yoshida; Koichi Yoshida; Naoki Fukuda; Masao Ohtake; Yoshiyuki Yanagisawa; Hiroyuki Takeda; Daisuke Kameda; Yoshitaka Yamaguchi; Nori Aoi; Ken-ichiro Yoneda; Hideaki Otsu; Satoshi Takeuchi; Takashi Sugimoto; Yosuke Kondo; Heiko Scheit; Yasuyuki Gono; Hiroyoshi Sakurai; Tohru Motobayashi; Hiroshi Suzuki; Taro Nakao; Hitomi Kimura; Yutaka Mizoi; Masafumi Matsushita; Kazuo Ieki; Takamasa Kuboki; Takayuki Yamaguchi; Takeshi Suzuki; Akira Ozawa; Tetsuaki Moriguchi; Yusuke Yasuda; Takashi Nakamura; Takashi Nannichi; Tomoyuki Shimamura; Yoshiaki Nakayama; Hans Geissel; Helmut Weick; Jerry A. Nolen; Oleg B. Tarasov; Anthony S. Nettleton; Daniel P. Bazin; Bradley M. Sherrill; David J. Morrissey; Wolfgang Mittig
Journal of the Physical Society of Japan,
巻：77,
号：8,
開始ページ：083201,
終了ページ：083201, 2008年08月,
［査読有り］A search for new isotopes using in-flight fission of a 345 MeV/nucleon U-238 beam has been carried Out in the commissioning experiment of the next-generation in-flight radioactive isotope beam separator BigRIPS at the RI Beam Factory at the RIKEN Nishina Center. Two neutron-rich palladium isotopes Pd-125 and Pd-126 were observed for the first time, which demonstrates the great potential of the RIKEN RI beam Factory.
Physical Society of Japan, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.77.083201DOI ID：10.1143/jpsj.77.083201,
ISSN：0031-9015,
eISSN：1347-4073,
Web of Science ID：WOS:000258699000001 Search for the G-parity irregular term in weak nucleon currents extracted from mirror beta decays in the mass 8 system T. Sumikama; K. Matsuta; T. Nagatomo; M. Ogura; T. Iwakoshi; Y. Nakashima; H. Fujiwara; M. Fukuda; M. Mihara; K. Minamisono; T. Yamaguchi; T. Minamisono
Physics Letters B,
巻：664,
号：4-5,
開始ページ：235,
終了ページ：240, 2008年06月,
［査読有り］Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.physletb.2008.05.049DOI ID：10.1016/j.physletb.2008.05.049,
ISSN：0370-2693 Nuclear matter radii of neutron-deficient Kr isotopes T. Yamaguchi; T. Suzuki; T. Ohnishi; F. Becker; M. Fukuda; H. Geissel; M. Hosoi; R. Janik; K. Kimura; T. Kuboki; S. Mandel; M. Matsuo; G. Münzenberg; S. Nakajima; T. Ohtsubo; A. Ozawa; A. Prochazka; M. Shindo; B. Sitár; P. Strmeň; T. Suda; K. Sümmerer; K. Sugawara; I. Szarka; M. Takechi; A. Takisawa; K. Tanaka; M. Yamagami
Physical Review C - Nuclear Physics,
巻：77,
号：3, 2008年03月,
［査読有り］Interaction cross sections (σI) of Kr72,76,80 on a C target were measured at the projectile fragment separator FRS at GSI. Effective matter radii of the nuclei were deduced by a Glauber model analysis so as to reproduce the experimental σI. An increase of matter radii toward the proton drip-line is observed. We compare the extracted radii to theoretical predictions, which are based on Skyrme-Hartree-Fock-Bogoliubov (SHFB) and on relativistic mean field (RMF) approaches. The enhancement of the matter radius observed in Kr72 is discussed. © 2008 The American Physical Society.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.77.034315DOI ID：10.1103/PhysRevC.77.034315,
ISSN：1089-490X,
eISSN：2469-9993,
SCOPUS ID：41549130310,
Web of Science ID：WOS:000254543500024 New scheme for precision mass measurements of rare isotopes produced at RI beam factory S. Nakajima; T. Yamaguchi; T. Suzuki; Y. Yamaguchi; T. Fujinawa; N. Fukunishi; A. Goto; T. Ohnishi; H. Sakurai; M. Wakasugi; Y. Yano; I. Arai; A. Ozawa; Y. Yasuda; T. Kikuchi; T. Ohtsubo
Acta Physica Polonica B,
巻：39,
号：2,
開始ページ：456,
終了ページ：462, 2008年02月,
［査読有り］For precision mass measurements of short-lived rare isotopes, a new experimental apparatus, named "Rare-RI Ring", has recently been proposed. A unique possibility of the project is discussed, comparing with other experimental techniques. The current status is presented.
JAGIELLONIAN UNIV PRESS, 英語, 研究論文（国際会議プロシーディングス）
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=45749129711&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=45749129711&origin=inwardISSN：0587-4254,
eISSN：1509-5770,
SCOPUS ID：45749129711,
Web of Science ID：WOS:000253635400023 Signals of enlarged core in 23AL Y. G. Ma; D. Q. Fang; C. W. Ma; K. Wang; T. Z. Yan; X. Z. Cai; W. Q. Shen; Z. Y. Sun; Z. Z. Ren; J. G. Chen; J. H. Chen; G. H. Liu; E. J. Ma; G. L. Ma; Y. Shi; Q. M. Su; W. D. Tian; H. W. Wang; C. Zhong; J. X. Zuo; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; A. Ozawa; T. Suba; K. Sugawara; K. Suzuki; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
Dynamical Aspects of Nuclear Fission - Proceedings of the 6th International Conference, DANF 2006,
開始ページ：191,
終了ページ：202, 2008年
The longitudinal momentum distribution (P//) of fragments after one-proton removal from 23Al and reaction cross sections (σR) for 23,24Al on carbon target at 74AMeV have been measured using 135AMeV 28Si primary beam on RIPS in RIKEN. P// is measured by a direct time-of-flight (TOF) technique, while σR is determined using a transmission method. An enhancement in σR is observed for 23Al compared with 24Al. The P// for 22Mg fragments from 23Al breakup has been obtained for the first time. FWHM of the distributions has been determined to be 233±14 MeV/c. The experimental data are discussed by use of the Few-Body Glauber Model (FBGM). Analysis of P// indicates a dominant d-wave configuration for the valence proton in the ground state of 23Al. The possibility of an enlarged 22Mg core for proton-rich nucleus 23Al is demonstrated. © 2008 World Scientific Publishing Co. Pte. Ltd.
World Scientific Publishing Co. Pte Ltd, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1142/9789812837530_0015DOI ID：10.1142/9789812837530_0015,
SCOPUS ID：84903709121 Nuclear radius systematics of Kr isotopes studied via their interaction cross-sections at relativistic energies T. Yamaguchi; T. Suzuki; T. Ohnishi; K. Suemmerer; F. Becker; M. Fukuda; H. Geissel; M. Hosoi; R. Janik; K. Kimura; S. Mandal; G. Muenzenberg; S. Nakajima; T. Ohtsubo; A. Ozawa; A. Prochazka; M. Shindo; B. Sitar; P. Strmen; T. Suda; K. Sugawara; I. Szarka; A. Takisawa; M. Takechi; K. Tanaka
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS,
巻：150,
開始ページ：197,
終了ページ：200, 2007年11月,
［査読有り］The interaction cross-sections of neutron-deficient Kr-72,Kr-76,Kr-80 isotopes have been measured by use of the transmission method at relativistic energies. Based on the Glauber model analysis effective root-mean-square matter radii of these nuclei have been determined for the first time. A systematic evolution of the matter radii in the mass A similar to 70 region is discussed and compared with that of light nuclei.
EDP SCIENCES S A, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epjst/e2007-00303-8DOI ID：10.1140/epjst/e2007-00303-8,
ISSN：1951-6355,
SCOPUS ID：37349015309,
Web of Science ID：WOS:000251601600055 Examining the exotic structure of the proton-rich nucleus Al-23 D. Q. Fang; W. Guo; C. W. Ma; K. Wang; T. Z. Yan; Y. G. Ma; X. Z. Cai; W. Q. Shen; Z. Z. Ren; Z. Y. Sun; J. G. Chen; W. D. Tian; C. Zhong; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; A. Ozawa; T. Suda; K. Sugawara; T. Suzuki; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
PHYSICAL REVIEW C,
巻：76,
号：3,
開始ページ：31601,
終了ページ：1-031601-5, 2007年09月,
［査読有り］The longitudinal momentum distribution (P-//) of fragments after one-proton removal from Al-23 and reaction cross sections (sigma(R)) for Al-23,Al-24 on a carbon target at 74A MeV have been measured. The Al-23,Al-24 ions were produced through projectile fragmentation of 135A MeV Si-28 primary beam using the RIPS fragment separator at RIKEN. P-// is measured by a direct time-of-flight (TOF) technique, while sigma(R) is determined using a transmission method. An enhancement in sigma(R) is observed for Al-23 compared with Al-24. The P-// for Mg-22 fragments from Al-23 breakup has been obtained for the first time. FWHM of the distributions has been determined to be 232 +/- 28 MeV/c. The experimental data are discussed by using the Few-Body Glauber model. Analysis of P-// demonstrates a dominant d-wave configuration for the valence proton in ground state of Al-23, indicating that Al-23 is not a proton halo nucleus.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.76.031601DOI ID：10.1103/PhysRevC.76.031601,
ISSN：0556-2813,
eISSN：1089-490X,
CiNii Articles ID：120006385534,
Web of Science ID：WOS:000249786600002 Status of the experimental program on mass measurements of stored exotic nuclei at the FRS-ESR facility Yu A. Litvinov; H. Geissel; K. Beckert; P. Beller; F. Bosch; D. Boutin; C. Brandau; L. Chen; I. Cullen; C. Dimopoulou; B. Fabian; M. Hausmann; O. Klepper; R. Knoebel; C. Kozhuharov; J. Kurcewicz; S. A. Litvinov; Z. Liu; M. Mazzocco; F. Montes; G. Muenzenberg; A. Musumarra; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W. Plass; C. Scheidenberger; M. Steck; B. Sun; T. Suzuki; P. M. Walker; H. Weick; C. Scheidenberger; M. Steck; B. Sun; T. Suzuki; P. M. Walker; H. Weick; N. Winckler; M. Winckler; T. Yamaguchi
NUCLEAR PHYSICS A,
巻：787,
開始ページ：315C,
終了ページ：320C, 2007年05月,
［査読有り］Schottky Mass Spectrometry (SMS) and Isochronous Mass Spectrometry (IMS) have been successfully applied for direct mass measurements of exotic nuclides at FRS-ESR facility at GSI. Both experimental methods are sensitive to single stored ions and can cover very efficiently a large number of nuclides in one run. Presently, more than 1100 masses of different nuclides have been covered by SMS and IMS in several FRS-ESR experiments whereby about 350 of them have been determined for the first time. In this paper, we present the status of our experimental program and use the experimental mass values to test the predictive power of modern mass models.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2006.12.050DOI ID：10.1016/j.nuclphysa.2006.12.050,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000246854700042 Nuclear radii of neutron-deficient Kr isotopes studied via their interaction cross-sections at relativistic energies T. Yamaguchi; T. Suzuki; T. Ohnishi; K. Suemmerer; F. Becker; M. Fukuda; H. Geissel; M. Hosoi; R. Janik; K. Kimura; S. Mandal; G. Muenzenberg; S. Nakajima; T. Ohtsubo; A. Ozawa; A. Prochazka; M. Shindo; B. Sitar; P. Strmen; T. Suda; K. Sugawara; I. Szarka; A. Takisawa; M. Takechi; K. Tanaka
NUCLEAR PHYSICS A,
巻：787,
開始ページ：471C,
終了ページ：475C, 2007年05月,
［査読有り］Interaction cross-sections of Kr-72,Kr-76,Kr-80 on a C target were measured at the projectile fragment separator FRS at GSI. We deduced the effective matter radii of the nuclei by a Glauber model analysis. An increase of matter radii toward the proton drip-line was observed.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2006.12.070DOI ID：10.1016/j.nuclphysa.2006.12.070,
ISSN：0375-9474,
eISSN：1873-1554,
SCOPUS ID：34247382537,
Web of Science ID：WOS:000246854700061 Experiment on Synthesis of an Isotope 277112 by $\text{$^{208}$Pb}+\text{$^{70}$Zn}$ Reaction Morita Kosuke; Morimoto Kouji; Kaji Daiya; Akiyama Takahiro; Goto Sin-ichi; Haba Hiromitsu; Ideguchi Eiji; Katori Kenji; Koura Hiroyuki; Kudo Hisaaki; Ohnishi Tetsuya; Ozawa Akira; Suda Toshimi; Sueki Keisuke; Tokanai Fuyuki; Yamaguchi Takayuki; Yoneda Akira; Yoshida Atsushi
Journal of the Physical Society of Japan,
巻：76,
号：4,
開始ページ：043201,
終了ページ：043201, 2007年04月,
［査読有り］The production and decay of 277112 have been investigated using a gas-filled recoil ion separator in irradiations of 208Pb targets with a 70Zn beam at 349.5 MeV. We have observed two $\alpha$-decay chains that can be assigned to subsequent decays from 277112 produced in the 208Pb(70Zn,n) reaction. After emitting four consecutive $\alpha$-particles, both the chains terminate by spontaneous fission decays of 261Rf, and the decay energies and decay times of both the chains obtained in the present work agree well with those reported by a group at Gesellschaft für Schwerionenforschung (GSI), Germany. The present result gives the first clear confirmation of the discovery of 277112 and its $\alpha$-decay product 273Ds reported previously.
一般社団法人日本物理学会, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.76.043201DOI ID：10.1143/jpsj.76.043201,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：110006278023,
CiNii Books ID：AA00704814 Observation of Second Decay Chain from 278113 Morita Kosuke; Morimoto Kouji; Kaji Daiya; Akiyama Takahiro; Goto Sin-ichi; Haba Hiromitsu; Ideguchi Eiji; Katori Kenji; Koura Hiroyuki; Kikunaga Hidetoshi; Kudo Hisaaki; Ohnishi Tetsuya; Ozawa Akira; Sato Nozomi; Suda Toshimi; Sueki Keisuke; Tokanai Fuyuki; Yamaguchi Takayuki; Yoneda Akira; Yoshida Atsushi
Journal of the Physical Society of Japan,
巻：76,
号：4,
開始ページ：045001,
終了ページ：045001, 2007年04月,
［査読有り］一般社団法人日本物理学会, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.76.045001DOI ID：10.1143/jpsj.76.045001,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：110006278073,
CiNii Books ID：AA00704814 Experiments on synthesis of the heaviest element at RIKEN K. Morita; K. Morimoto; D. Kaji; T. Akiyama; S. Goto; H. Haba; E. Ideguchi; R. Kanumgo; K. Katori; H. Kikunaga; H. Koura; H. Kudo; T. Ohnishi; A. Ozawa; N. Sato; T. Suda; K. Sueki; F. Tokanai; H. Xu; T. Yamaguchi; A. Yoneda; A. Yoshida; Y. -L. Zhao
TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI,
巻：891,
開始ページ：3,
終了ページ：+, 2007年,
［査読有り］At the Institute of Physical and Chemical Research (RIKEN) a series of experiments studying the productions and their decays of the heaviest elements have been performed by using a gas-filled recoil ion separator GARIS. Results on the isotope of the 112th element, (277)112, and on that of the 113th element (278)113, are reviewed. Tow decay chains which are assigned to be ones originating from the isotope (277)112 were observed in the Pb-201(Zn-70, n) reaction. Both chains consisted of four consecutive alpha decays followed by a spontaneous fission. The results provide a confirmation of the production and decay of the isotope (277)112 reported by a research group at Gesellschaft fur Schwerionenforschung (GSI), Germany, produced via the same reaction by using a velocity filter. Tow decay chains, both consisted of four consecutive alpha decays followed by a spontaneous fission, were observed also in the reaction Bi-209(Zn-70, n). Those are assigned to be the convincing candidate events of the decays of the isotope of the 113th element (278)113, and its daughter nuclei, (274)Rg, (270)Mt, (266)Bh, and (262)Db.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.2713494DOI ID：10.1063/1.2713494,
ISSN：0094-243X,
Web of Science ID：WOS:000245742800001 Search for the G-parity violation of weak nucleon current in β decays of mass 8 system T. Sumikama; K. Matsuta; T. Nagatomo; M. Ogura; T. Iwakoshi; Y. Nakashima; H. Fujiwara; M. Fukuda; M. Mihara; K. Minamisono; T. Yamaguchi; T. Minamisono
AIP Conference Proceedings,
巻：915,
開始ページ：230,
終了ページ：+, 2007年
The β-ray angular distribution from the mirror pair8Li and8B have been observed to search for the G-parity violating induced tensor term gIIin the weak nucleon current The pure nuclear spin alignment of8Li and8B (Iπ= 2+) was successfully converted from the nuclear spin polarization by applying a β-NMR technique. The alignment correlation term in the β-ray angular distribution was observed as a function of β-ray energy. The gIIwas extracted from the alignment correlation term by combining the known β-α correlation term and weak magnetism to be gII/gA= -0.28 ± 0.28(stat.)±0.15(syst.) at a 1σ (68%) level. © 2007 American Institute of Physics.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.2750769DOI ID：10.1063/1.2750769,
ISSN：0094-243X,
SCOPUS ID：34548780415,
Web of Science ID：WOS:000248046300036 Proton skin in neutron-deficient nuclei studied via interaction cross-sections at relativistic energies
S. Nakajima; T. Yamaguchi; T. Ohtsubo; A. Ozawa; T. Suzuki
PROTON EMITTING NUCLEI AND RELATED TOPICS, 巻：961, 開始ページ：175, 終了ページ：+, 2007年, ［査読有り］
The interaction cross-sections of neutron-deficient Ar and Kr isotopes were precisely measured using the fragment separator FRS at relativistic energies. Based on Glauber model analysis, effective root-mean-square matter radii of these nuclei were determined. Using charge radii obtained from isotope-shift measurements, an evolution of proton skins for Ar isotopes is clearly shown. A systematics of the matter radii in the mass region A similar to 70 is also discussed.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
ISSN：0094-243X, Web of Science ID：WOS:000252267300027
New developments for isochronous mass measurements of short-lived nuclei
R. Knoebel; S. A. Litvinov; B. Sun; K. Beckert; P. Beller; F. Bosch; D. Boutin; C. Brandau; L. Chen; I. J. Cullen; C. Dimopoulou; A. Dolinskii; B. Fabian; H. Geissel; M. Hausmann; C. Kozhuharov; J. Kurcewicz; Yu. A. Litvinov; Z. Liu; M. Mazzocco; F. Montes; G. Muenzenberg; A. Musumarra; S. Nakajima; C. Nociforo; F. Nolden; T. Ohtsubo; A. Ozawa; Z. Patyk; W. R. Plass; C. Scheidenberger; M. Shindo; M. Steck; T. Suzuki; P. M. Walker; H. Weick; N. Winckler; M. Winkler; T. Yamaguchi
TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI, 巻：891, 開始ページ：199, 終了ページ：+, 2007年, ［査読有り］
The combination of the in-flight separator FRS and the storage-ring ESR at GSI offers unique possibilities for high accuracy mass and lifetime measurements of bare and few-electron fragments. Operating the ESR in the isochronous mode allows for measurements of revolution frequencies of stored ions without cooling. Isochronous Mass Spectrometry (IMS) can be applied to fragments with half-lives as short as several tens of microseconds. Newly developed magnetic rigidity tagging increases the resolving power of IMS to about 500000. IMS can be used to measure masses of nuclei with rates even lower than one ion per day, a property also needed for the purpose of the ILIMA project at the future facility FAIR.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
ISSN：0094-243X, Web of Science ID：WOS:000245742800025
Experiments on synthesis of the heaviest elements at RIKEN Morimoto K; Morita K; Kaji D; Yoneda A; Haba H; Akiyama T; Akiyama T; Sato N; Sato N; Goto S; Ideguchi E; Katori K; Kikunaga H; Koura H; Kudo H; Ohnishi T; Ozawa A; Suda T; Sueki K; Tokanai F; Yamaguchi T; Yoshida A
AIP Conference Proceedings,
巻：853,
開始ページ：253,
終了ページ：258, 2006年12月
In the Institute of Physical and Chemical Research (RIKEN), using high intensity heavy ion beams from the RIKEN Linear Accelerator, productions and decays of isotopes of the heaviest elements have been investigated by using the gas-filled recoil separator, GARIS. The isotopes studied were 265Hs, 271Ds, 272Rg, 277112, and 278113, respectively. Based on the observed decay chains consisting of consecutive alpha decays connected to the previously known alpha decays or spontaneous fissions, assignments of the initially produced isotopes were done. Our data with the atomic number from 108 to 112, agree well with the data previously taken. The production cross section of the isotope 278113 of the 113th element have reached around 32 fb which shows the simple decrease of the cross section with the increase of the atomic number. The isotopes were produced, for the first time in the 1n evaporation channel from heavy-ion induced fusion reaction. © 2006 American Institute of Physics.
AMER INST PHYSICS, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1063/1.2338386DOI ID：10.1063/1.2338386,
ISSN：0094-243X,
Web of Science ID：WOS:000240548300039 Experiments on synthesis of the heaviest elements at RIKEN Morimoto K; Morita K; Kaji D; Yoneda A; Haba H; Akiyama T; Akiyama T; Sato N; Sato N; Goto S; Ideguchi E; Katori K; Kikunaga H; Koura H; Kudo H; Ohnishi T; Ozawa A; Suda T; Sueki K; Tokanai F; Yamaguchi T; Yoshida A
AIP Conference Proceedings,
巻：865,
開始ページ：159,
終了ページ：164, 2006年12月
In the Institute of Physical and Chemical Research (RIKEN), using high intensity heavy ion beams from the RIKEN Linear Accelerator, productions and decays of isotopes of the heaviest elements have been investigated by using the gas-filled recoil separator, GARIS. The isotopes studied were 265Hs, 271Ds, 272Rg, 277112, and 278113, respectively. Based on the observed decay chains consisting of consecutive alpha decays connected to the previously known alpha decays or spontaneous fissions, assignments of the initially produced isotopes were done. Our data with the atomic number from 108 to 112, agree well with the data previously taken. The production cross section of the isotope 278113 of the 113th element have reached around 32 fb which shows the simple decrease of the cross section with the increase of the atomic number. The isotopes were produced, for the first time in the In evaporation channel from heavy-ion induced fusion reaction. © 2006 American Institute of Physics.
AMER INST PHYSICS, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1063/1.2398844DOI ID：10.1063/1.2398844,
ISSN：0094-243X,
Web of Science ID：WOS:000243246900025 Study of exoticness of proton-rich nuclei Al-23 and it's neighboring nuclei
Ma Chun-Wang; Fang De-Qing; Guo Wei; Wang Kun; Yan Ting-Zhi; Ma Yu-Gang; Cai Xiang-Zhou; Shen Wen-Qing; Sun Zhi-Yu; Ren Zhong-Zhou; Chen Jin-Gen; Tian Wen-Dong; Wang Hong-Wei; Ma Er-Jun; Liu Gui-Hua; Shi Yu; Su Qian-Min; Zhong Chen; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; T. Suda; K. Sugawara; T. Suzuki; A. Ozawa; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 巻：30, 開始ページ：186, 終了ページ：188, 2006年12月
We measured the reaction cross sections(sigma(R)) and parallel momentum distributions(P-//) of Al-23 and it's neighboring nuclei at RIKEN-RIPS. An enhanced sigma(R) of Al-23 is observed, which is consistent with the previous experimental result. And the P-// of fragment from the projectile breakup nuclei have been obtained at the same time. We discuss our experimental data under the Few-Body Glauber Model. The P-// of Al-23 shows the ground state of the valence proton is a d-wave, which is consistent with the recent measurement of Al-23's g factor. To explain the experimental sigma(R) and P-// of Al-23 at the same time, we suggest an enlarged core of Al-23.
SCIENCE CHINA PRESS, 中国語, 研究論文（学術雑誌）
ISSN：0254-3052, Web of Science ID：WOS:000243422700052
Production cross sections of isotopes formed by fragmentation of similar to 1A (GeVKr)-Kr-80 beam Yamaguchi T; Ohnishi T; Suzuki T; Becker F; Fukuda M; Geissel H; Hosoi M; Janik R; Kelic A; Kimura K; Mandel S; Muenzenberg G; Nakajima S; Ohtsubo T; Ozawa A; Prochazka A; Shindo M; Sitar B; Strmen P; Suda T; Summerer K; Sugawara K; Szarka I; Takechi M; Takisawa A; Tanaka K
PHYSICAL REVIEW C,
巻：74,
号：4, 2006年10月,
［査読有り］DOI：https://doi.org/10.1103/PhysRevC.74.044608DOI ID：10.1103/PhysRevC.74.044608,
ISSN：2469-9985,
Web of Science ID：WOS:000241723800029 Measurements of reaction cross section and fragment momentum distribution for N=10 proton-rich isotones W. Guo; D. Q. Fang; Y. G. Ma; C. W. Ma; K. Wang; T. Z. Yan; X. Z. Cai; W. Q. Shen; Z. Y. Sun; Z. Z. Ren; J. G. Chen; J. H. Chen; G. H. Liu; E. J. Ma; G. L. Ma; Y. Shi; Q. M. Su; W. D. Tian; H. W. Wang; C. Zhong; J. X. Zuo; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; A. Ozawa; T. Suda; K. Sugawara; T. Suzuki; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
INTERNATIONAL JOURNAL OF MODERN PHYSICS E,
巻：15,
号：7,
開始ページ：1523,
終了ページ：1530, 2006年10月,
［査読有り］The longitudinal momentum (p(//)) distributions of fragments after one-proton removal and reaction cross sections (sigma R) for several N = 10 isotones at intermediate energy (similar to 70A MeV) have been measured simultaneously at the RIken Projectile fragment Separator (RIPS). p(//) was measured using a direct time-of-flight (TOF) technique, while sigma(R) was determined using a transmission method. An enhanced sigma(R) is observed for Al-23 comparing with its neighbors. The p(//) distribution for Mg-22 fragments from Al-23 one-proton removal reaction has been obtained for the first time. The experimental data are discussed within a Few Body Glauber (FBG) framework. Analysis of p// indicates a dominant d-wave component in the ground state of Al-23. This agrees with recent experimental results. We also suggest the possibility of an enlarged Mg-22 core for proton-rich nucleus Al-23.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1142/S0218301306005101DOI ID：10.1142/S0218301306005101,
ISSN：0218-3013,
eISSN：1793-6608,
Web of Science ID：WOS:000242693300020 Measurements of the interaction cross-sections for Be-14 and B-14,B-15 as projectiles with a new scheme at RIBLL A Ozawa; YZ Cai; ZQ Chen; M Chiba; DQ Fang; ZG Guo; T Izumikawa; JX Li; RS Mao; T Ohnishi; WQ Shen; T Suda; ZY Sun; T Suzuki; Tanihata, I; WD Tian; JS Wang; M Wang; YB Wei; GQ Xiao; ZG Xiao; T Yamaguchi; Y Yamaguchi; A Yoshida; WL Zhan; HY Zhang; T Zheng; C Zhong
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,
巻：247,
号：2,
開始ページ：155,
終了ページ：160, 2006年06月
We have measured the interaction cross-sections (sigma(1)) for light neutron-rich nuclei (Be-14, B-14,B-15) at similar to 50A MeV at the Radioactive Ion Beam Line in Lanzhou (RIBLL) in IMP with a new scheme. In this scheme, a carbon reaction target was installed at the intermediate focusing point at RIBLL. This scheme allowed us to identify particles before and after the reaction target unambiguously. However, this scheme might suffer a large loss of transmission efficiency in the second half of RIBLL. We checked this effect by changing the emittance of the RI beams. The results showed that a correction of the transmission efficiency is needed to deduce sigma(1). We performed a Monte Carlo type simulation and tried to deduce sigma(1) for the above nuclei. Finally, we obtained reasonable sigma(1) although their error bars were fairly large. The results were compared with calculations by an energy-dependent semi-empirical formula. (c) 2006 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nimb.2006.01.054DOI ID：10.1016/j.nimb.2006.01.054,
ISSN：0168-583X,
Web of Science ID：WOS:000238182200001 Measurements of the reaction cross sections and momentum distributions for 23Al neighbouring nuclei K. Wang; D. Q. Fang; W. Guo; Y. G. Ma; C. W. Ma; T. Z. Yan; X. Z. Cai; W. Q. Shen; Z. Y. Sum; Z. Z. Ren; J. G. Chen; G. H. Liu; E. J. Ma; Y. Shi; Q. M. Su; W. D. Tian; H. W. Wang; C. Zhong; M. Hosoi; T. Izumikawa; R. Kanungo; S. Nakajima; T. Ohnishi; T. Ohtsubo; A. Ozawa; T. Suda; K. Sugawara; T. Suzuki; A. Takisawa; K. Tanaka; T. Yamaguchi; I. Tanihata
AIP Conference Proceedings,
巻：865,
開始ページ：63,
終了ページ：67, 2006年,
［査読有り］The reaction cross sections and momentum distributions for 23Al and its neighbouring nuclei have been measured at the Riken Projectile Fragment Separator (RIPS). The primary beam of 135 A MeV 28Si was used to produce the secondary beams. The measurement of σR was carried out by using a transmission-type method, σR was determined by the ratios between incident and outgoing particles without reaction from both target-in and target-out measurements. P// of fragment from breakup reactions was determined from the measured TOF between F2 and F3. An enhancement is observed in σR for 23Al compared to its neighbors. The P// of 22Mg fragments from 23Al breakup have been obtained. The width of the distributions is found to be consistent with prediction by the Goldhaber Model. The experimental data are discussed in the framework of Glauber model. The analysis of P// indicates a dominant d-wave component in the ground state of 23Al. This confirms the result of a recent magnetic moment measurement which indicates that the valence proton is in d-wave. © 2006 American Institute of Physics.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.2398829Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33846519265&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=33846519265&origin=inwardDOI ID：10.1063/1.2398829,
ISSN：0094-243X,
eISSN：1551-7616,
SCOPUS ID：33846519265,
Web of Science ID：WOS:000243246900010 Nuclear structure study through nuclear moments of mirror pairs K. Matsuta; T. Nagatomo; A. Ozawa; M. Mihara; R. Matsumiya; K. Yamada; T. Yamaguchi; T. Ohtsubo; S. Momota; T. Izumikawa; T. Sumikama; Y. Nakashima; H. Fujiwara; S. Kumashiro; M. Ota; D. Shinojima; H. Tanaka; T. Yasuno; S. Nakajima; T. Suzuki; K. Yoshida; K. Muranaka; T. Maemura; A. Chiba; Y. Utsuno; M. Fukuda; K. Tanaka; A. Kitagawa; M. Torikoshi; M. Kanazawa; S. Sato; M. Takechi; T. Miyake; M. Ogura; I. Tanihata; Y. Nojiri; K. Minamisono; T. Minamisono; J. R. Alonso; G. F. Krebs
NUCLEAR PHYSICS TRENDS,
巻：865,
開始ページ：153,
終了ページ：+, 2006年,
［査読有り］beta-NMR spectra have been observed for Cl-33, Al-23 and Ne-23. As a result, the magnetic moment of Cl-33 was determined as vertical bar mu(Cl-33)vertical bar = 0.7549(3) mu(N). Combined with the known magnetic moment of S-33 and the ft-value of the Cl-33 beta decay, the orbital angular momenta and the intrinsic spins for proton and neutron groups, are deduced separately as < l(p)> = 1.3, < I-n > = 0.3, < S-p > = -0.12 and < S-n > = -0.02. The magnetic moment of Al-23, and that of Ne-23 were determined as vertical bar mu(Al-23)vertical bar = 3.89(22) mu(N) and vertical bar mu(Ne-23)vertical bar = 1.0817(9) mu(N), respectively. As a result, the orbital angular momentum < l(z)> and the intrinsic spin < S-z > were deduced to be 2.09(29) and 0.41(29), respectively. Combined with theft-value of the 0 transition from the ground state of Al-23 to the excited state of Mg-23, proton and neutron contributions are separated. The obtained expectation values < l(p)>, < l(n)>, < S-p > and < S-n > are compared with the shell model predictions.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1063/1.2398843DOI ID：10.1063/1.2398843,
ISSN：0094-243X,
SCOPUS ID：33846534796,
Web of Science ID：WOS:000243246900024 Measurement of the spin and magnetic moment of Al23A. Ozawa; K. Matsuta; T. Nagatomo; M. Mihara; K. Yamada; T. Yamaguchi; T. Ohtsubo; S. Momota; T. Izumikawa; T. Sumikama; Y. Nakashima; H. Fujiwara; S. Kumashiro; R. Matsumiya; M. Ota; D. Shinojima; H. Tanaka; T. Yasuno; S. Nakajima; T. Suzuki; K. Yoshida; K. Muranaka; T. Maemura; A. Chiba; Y. Utsuno; M. Fukuda; K. Tanaka; I. Tanihata; Y. Nojiri; T. Minamisono; J. R. Alonso; G. F. Krebs; T. J.M. Symons
Physical Review C - Nuclear Physics,
巻：74,
号：2, 2006年,
［査読有り］For the first time, we obtained the g factor for the ground state of Al23 by use of a β-NMR measurement. Al23 has a small proton separation energy and is a potential proton-halo candidate. The obtained g factor, |g|=1.557±0.088, clearly shows the spin and parity, Jπ=5/2+, for Al23, which is the same as that of its mirror partner, Ne23. The possible nuclear structure of Al23 is also discussed. © 2006 The American Physical Society.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.74.021301DOI ID：10.1103/PhysRevC.74.021301,
ISSN：1089-490X,
SCOPUS ID：33746647407 Production cross sections of isotopes formed by fragmentation of ∼1A GeV Kr80 beamT. Yamaguchi; T. Ohnishi; T. Suzuki; F. Becker; M. Fukuda; H. Geissel; M. Hosoi; R. Janik; A. Kelić; K. Kimura; S. Mandel; G. Münzenberg; S. Nakajima; T. Ohtsubo; A. Ozawa; A. Prochazka; M. Shindo; B. Sitár; P. Strmeň; T. Suda; K. Sümmerer; K. Sugawara; I. Szarka; M. Takechi; A. Takisawa; K. Tanaka
Physical Review C - Nuclear Physics,
巻：74,
号：4, 2006年,
［査読有り］Production cross sections for the projectile fragmentation of a 1.05A GeV Kr80 beam on a Be target were measured at the projectile fragment separator FRS at GSI. Cross sections were obtained for isotopes of the elements Ge to Kr close to the proton drip line. These data are compared to the results of the empirical parametrization EPAX and to abrasion-ablation calculations. We also compare the results to predictions of intranuclear-cascade calculations. The intranuclear-cascade calculations allow us to also compare well measured one-proton pickup cross sections. © 2006 The American Physical Society.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.74.044608DOI ID：10.1103/PhysRevC.74.044608,
ISSN：1089-490X,
SCOPUS ID：33750188094 Present and future experiments with stored exotic nuclei at relativistic energies
H. Geissel; Yu. A. Litvinov; B. Pfeiffer; F. Attallah; G. Audi; K. Beckert; P. Beller; F. Bosch; D. Boutin; T. J. Burvenich; L. Chen; T. Faestermann; M. Falch; B. Franzke; M. Hausmann; E. Kaza; T. Kerscher; P. Kienle; O. Klepper; R. Knoebel; C. Kozhuharov; K. -L. Kratz; S. A. Litvinov; K. E. G. Loebner; L. Maier; M. Matos; F. Montes; G. Muenzenberg; C. Nociforo; F. Nolden; Yu. N. Novikov; T. Ohtsubo; A. Ostrowski; Z. Patyk; W. Plass; M. Portillo; T. Radon; H. Schatz; C. Scheidenberger; J. Stadlmann; M. Steck; B. Sun; K. Takahashi; G. Vorobjev; H. Weick; M. Winkler; H. Wollnik; T. Yamaguchi
FRONTIERS IN NUCLEAR STRUCTURE ASTROPHYSICS, AND REACTIONS: FINUSTAR, 巻：831, 開始ページ：108, 終了ページ：+, 2006年, ［査読有り］
Recent progress is presented from experiments on masses and lifetimes of bare and few-electron exotic nuclei at GSI. Relativistic rare isotopes produced via projectile fragmentation and fission were separated in flight by the fragment separator FRS and injected into the storage ring ESR. This worldwide unique experimental technique gives access to all fragments with half-lives down to the microsecond range. The great research potential is also demonstrated by the discovery of new isotopes along with simultaneous measurements of mass and lifetime. Representative results from time-resolved Schottky mass spectrometry are compared with modern theoretical predictions. The measured isospin dependence of pairing-gap energies is not reproduced by conventional mass models. The first direct observation of bound-state beta decay has been achieved. Single particle decay measurements and the continuous recording of both stored mother and daughter nuclei open up a new era for spectroscopy. The combination of stochastic and electron cooling has allowed us to measure with Schottky analysis for the first time short-lived isomers. The future international NUSTAR facility at FAIR consisting of a new large-acceptance in-flight separator (Super-FRS) will be an ideal tool to study the r- and rp-process nuclei.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
ISSN：0094-243X, Web of Science ID：WOS:000237323700019
High-rate particle identification of high-energy heavy ions using a tilted electrode gas ionization chamber K Kimura; T Izumikawa; R Koyama; T Ohnishi; T Ohtsubo; A Ozawa; W Shinozaki; T Suzuki; M Takahashi; Tanihata, I; T Yamaguchi; Y Yamaguchic
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,
巻：538,
号：1-3,
開始ページ：608,
終了ページ：614, 2005年02月,
［査読有り］A high-rate particle identification device for high-energy heavy ions has been developed which utilizes a stacked configuration of grid-less parallel plate gas ionization chambers with thin anode-cathode gaps. The high-rate capability of this chamber was realized by adopting bipolar shaping of anode signals and by the suitable choice of a counter gas. Z-resolutions of 0.2-0.3 were obtained for nuclear fragments of Ar-40 at 95 A MeV with an intensity as high as 10(6) cps. (C) 2004 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nima.2004.08.100DOI ID：10.1016/j.nima.2004.08.100,
ISSN：0168-9002,
Web of Science ID：WOS:000227080600046 Alignment correlation term in mass A=8 system and G-parity irregular term T Sumikama; T Iwakoshi; T Nagatomo; M Ogura; Y Nakashima; H Fujiwara; K Matsuta; T Minamisono; M Mihara; M Fukuda; K Minamisono; T Yamaguchi
EUROPEAN PHYSICAL JOURNAL A,
巻：25,
開始ページ：709,
終了ページ：710, 2005年,
［査読有り］The pure nuclear spin alignments of Li-8 and B-8 were produced from the nuclear spin polarization applying the beta-NMR method. The alignment correlation terms in the beta-ray angular distribution of the mirror pair Li-8 and B-8 were observed to limit the G parity irregular term in the weak nuclear current. The significant deviation due to the forbidden matrix elements between the alignment correlation terms and the beta-alpha correlation terms was observed. The determination of the alignment correlation terms was essential to extract the G-parity violating induced tensor term without the influence of the forbidden term in the vector current.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epjad/i2005-06-075-3DOI ID：10.1140/epjad/i2005-06-075-3,
ISSN：1434-6001,
SCOPUS ID：24944448263,
Web of Science ID：WOS:000233934000197 Magnetic moment of extremely proton-rich nucleus Al-23 T Nagatomo; K Matsuta; A Ozawa; Y Nakashima; R Matsumiya; M Mihara; T Yasuno; A Chiba; K Yamada; S Momota; T Ohtsubo; M Ohta; D Shinojima; T Izumikawa; H Tanaka; T Yamaguchi; S Nakajima; H Maemura; K Muranaka; S Kumashiro; H Fujiwara; K Yoshida; T Sumikama; K Tanaka; M Ogura; K Minamisono; M Fukuda; T Minamisono; Y Nojiri; T Suzuki; Tanihata, I; Alonso, JR; GF Krebs; TJM Symons
International Symposium on Correlation Dynamics in Nuclei,
巻：20,
開始ページ：173,
終了ページ：174, 2005年
The g-factor of the extremely proton-rich nucleus Al-23 (T-1/2 = 0.47s) has been measured by means of the O-NMR method for the first time. The g-factor were determined as vertical bar g vertical bar = 1.557(88) from the obtained NMR spectra. From the comparison between the experimental value and the shell model calculation, the spin parity of the ground state of Al-23 was determined as I-pi = 5/2(+). Thus, the magnetic moment of Al-23 was determined as vertical bar mu vertical bar = 3.89(22)mu(N).
IOP PUBLISHING LTD, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1088/1742-6596/20/1/032DOI ID：10.1088/1742-6596/20/1/032,
ISSN：1742-6588,
SCOPUS ID：25444450571,
Web of Science ID：WOS:000236386200032 Nucleon density distribution of proton drip-line nucleus Ne-17 K Tanaka; M Fukuda; M Mihara; M Takechi; T Chinda; T Sumikama; S Kudo; K Matsuta; T Minamisono; T Suzuki; T Ohtubo; T Izumikawa; S Momota; T Yamaguchi; T Onishi; A Ozawa; Tanihata, I; Z Tao
EUROPEAN PHYSICAL JOURNAL A,
巻：25,
開始ページ：221,
終了ページ：222, 2005年,
［査読有り］Ne-17 is one of the candidates for proton halo nuclei. To study the halo structure of Ne-17, we measured the reaction cross-sections (sigma(R)) and deduced the density distribution of Ne-17 through the energy dependence of sigma(R). From the deduced density, it is found that Ne-17 has a long density tail which is consistent with the picture of two valence protons of Ne-17 occupying the 2s(1/2) orbital.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1140/epjad/i2005-06-182-1DOI ID：10.1140/epjad/i2005-06-182-1,
ISSN：1434-6001,
eISSN：1434-601X,
Web of Science ID：WOS:000233934000065 New results with stored exotic nuclei at relativistic energies H Geissel; YA Litvinov; F Attallah; K Beckert; P Beller; F Bosch; D Boutin; T Faestermann; M Falch; B Franzke; M Hausmann; M Hellstrom; E Kaza; T Kerscher; O Klepper; HJ Kluge; C Kozhuharov; KL Kratz; SA Litvinov; KEG Lobner; L Maier; M Matos; G Munzenberg; F Nolden; YN Novikov; T Ohtsubo; A Ostrowski; Z Patyk; B Pfeiffer; M Portillo; T Radon; C Scheidenberger; Shishkin, V; J Stadlmann; M Steck; DJ Viera; H Weick; M Winkler; H Wollnik; T Yamaguchi
NUCLEAR PHYSICS A,
巻：746,
開始ページ：150C,
終了ページ：155C, 2004年12月,
［査読有り］Recently, much progress has been made with stored exotic nuclei at relativistic velocities ((v)/(c) = 0.7). Fragments of Pb-208 and Bi-209 projectiles and fission products from U-238 ions were produced, separated in flight with the fragment separator FRS, and injected into the storage-cooler ring ESR for precision measurements. 114 new masses of neutron-deficient isotopes in the lead region have been measured with time-resolved Schottky Mass Spectrometry (SMS). A new isospin dependence of the pairing energy was observed due to the improved mass accuracy of typically 1.5 x 10(-7) (30 keV). New masses of short-lived neutron-rich fission fragments have been obtained with Isochronous Mass Spectrometry (IMS). An innovative field of spectroscopy has been opened up with lifetime measurements of stored bare and few-electron fragments after applying both stochastic and electron cooling.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2004.09.030DOI ID：10.1016/j.nuclphysa.2004.09.030,
ISSN：0375-9474,
Web of Science ID：WOS:000225682600027 Momentum distributions and production cross sections of projectile-like fragments S Momota; Tanihata, I; A Ozawa; M Notani; K Yoshida; K Morimoto; T Onishi; T Yamaguchi; A Yoshida; YX Watanabe; L Zhong; M Kanazawa; A Kitagawa; M Suda; Y Nojiri
NUCLEAR PHYSICS A,
巻：746,
開始ページ：407C,
終了ページ：410C, 2004年12月,
［査読有り］To investigate the production mechanism of projectile-like fragments (PLFs) at intermediate energies, the momentum distributions of PLFs produced in reactions at E/A = 95,290, and 430MeV were measured at RIKEN and NIRS. A correlation and a systematics in the width of the transverse momentum distribution were derived from the results. The production cross sections derived from the observed momentum distributions show the target and the incident energy dependences.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2004.09.084DOI ID：10.1016/j.nuclphysa.2004.09.084,
ISSN：0375-9474,
Web of Science ID：WOS:000225682600072 Beta-ray angular distributions of spin aligned Li-8 and B-8 T Sumikama; T Iwakoshi; T Nagatomo; M Ogura; Y Nakashima; H Fujiwara; K Matsuta; T Minamisono; M Mihara; M Fukuda; K Minamisono; T Yamaguchi
NUCLEAR PHYSICS A,
巻：746,
開始ページ：681C,
終了ページ：684C, 2004年12月,
［査読有り］The alignment correlation terms in the beta-ray angular distributions from spin aligned Li-8 and B-8 have been measured precisely. The difference of these terms between the mirror pair is compared with the prediction. As a result, the G-parity violating induced tensor term is found to be small. The significant contribution from the second-forbidden matrix elements is shown by comparing with the beta-alpha correlation coefficients.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2004.09.050DOI ID：10.1016/j.nuclphysa.2004.09.050,
ISSN：0375-9474,
eISSN：1873-1554,
SCOPUS ID：8844228318,
Web of Science ID：WOS:000225682600134 Investigation on the halo structure in C-15
DQ Fang; T Yamaguchi; T Zheng; A Ozawa; M Chiba; R Kanungo; T Kato; K Morimoto; T Ohnishi; T Suda; Y Yamaguchi; A Yoshida; K Yoshida; Tanihata, I
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 巻：28, 開始ページ：93, 終了ページ：95, 2004年12月
The sigma(R) for C-14,C-15 and P-// of C-13,C-14 fragments from C-15, and C-13 fragments from C-14 breakup have been measured at 83 A MeV. FWHMs of P-// have been determined to be 71 +/- 9 MeV/c and 223 +/- 28 MeV/c for 140 and 130 from C-14, and 195 +/- 21 MeV/c for 130 from 140. The FWHM for 130 from 150 and 140 are consistent with Goldhaber model's prediction. While the FWHM of 140 fragments from 150 is much smaller. An anomalous enhancement from its neighbors has been observed in the measured sigma(R) of C-15. The experimental data are discussed in the framework of the Glauber model. The analysis of both P-// and sigma(R) data indicate a dominant s-wave component in the ground state of C-15.
SCIENCE PRESS, 中国語, 研究論文（学術雑誌）
ISSN：0254-3052, Web of Science ID：WOS:000229226900027
Density distribution of proton drip-line nucleus Ne-17 K Tanaka; M Fukuda; M Mihara; M Takechi; T Chinda; T Sumikama; S Kudo; K Matsuta; T Minamisono; T Ohtubo; T Suzuki; S Momota; T Izumikawa; T Yamaguchi; T Onishi; A Ozawa; Tanihata, I; Z Tao
NUCLEAR PHYSICS A,
巻：746,
開始ページ：532C,
終了ページ：535C, 2004年12月,
［査読有り］Ne-17 is one of the candidates for a proton-halo nucleus. In order to make the halo structure of Ne-17 clear, we studied the density distribution of Ne-17 through the reaction cross sections sigma(R). As a consequence, it is suggested from sigma(R) data that Ne-17 has a long tail in the density, which is consistent with an occupancy of the 2s(1/2) orbital by the two valence protons.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2004.09.154DOI ID：10.1016/j.nuclphysa.2004.09.154,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000225682600101 Density distribution of B-17 from a reaction cross-section measurement Yamaguchi Y; Wu C; Suzuki T; Ozawa A; Fang DQ; Fukuda M; Iwasa N; Izumikawa T; Jeppesen H; Kanungo R; Koyama R; Ohnishi T; Ohtsubo T; Shinozaki W; Suda T; Takahashi M; Tanihata I
PHYSICAL REVIEW C,
巻：70,
号：5, 2004年11月,
［査読有り］DOI：https://doi.org/10.1103/PhysRevC.70.054320DOI ID：10.1103/PhysRevC.70.054320,
ISSN：2469-9985,
Web of Science ID：WOS:000226161000030 Experiment on the Synthesis of Element 113 in the Reaction 209Bi(70Zn,n)278113 Morita Kosuke; Morimoto Kouji; Kaji Daiya; Akiyama Takahiro; Goto Sin-ichi; Haba Hiromitsu; Ideguchi Eiji; Kanungo Rituparna; Katori Kenji; Koura Hiroyuki; Kudo Hisaaki; Ohnishi Tetsuya; Ozawa Akira; Suda Toshimi; Sueki Keisuke; Xu HuShan; Yamaguchi Takayuki; Yoneda Akira; Yoshida Atsushi; Zhao YuLiang
Journal of the Physical Society of Japan,
巻：73,
号：10,
開始ページ：2593,
終了ページ：2596, 2004年10月,
［査読有り］The convincing candidate event of the isotope of the 113th element, 278113, and its daughter nuclei, 274111 and 270Mt, were observed, for the first time, in the $\text{$^{209}$Bi} + \text{$^{70}$Zn}$ reaction at a beam energy of 349.0 MeV with a total dose of $1.7 \times 10^{19}$. Alpha decay energies and decay times of the candidates, 278113, 274111, and 270Mt, were ($11.68 \pm 0.04$ MeV, 0.344 ms), ($11.15 \pm 0.07$ MeV, 9.26 ms), and ($10.03 \pm 0.07$ MeV, 7.16 ms), respectively. The production cross section of the isotope was deduced to be 55$^{+150}_{-45}$ fb (10-39 cm2).
一般社団法人日本物理学会, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1143/jpsj.73.2593DOI ID：10.1143/jpsj.73.2593,
ISSN：0031-9015,
eISSN：1347-4073,
CiNii Articles ID：110001979170,
CiNii Books ID：AA00704814 Neutron configuration of 16C studied via one- and two-neutron removal momentum distributions T. Yamaguchi; T. Zheng; A. Ozawa; M. Chiba; R. Kanungo; T. Kato; K. Morimoto; T. Ohnishi; T. Suda; Y. Yamaguchi; A. Yoshida; K. Yoshida; I. Tanihata
Nuclear Physics A,
巻：734,
号：1-4,
開始ページ：E73,
終了ページ：E76, 2004年04月,
［査読有り］We report a new method to measure the longitudinal momentum distributions of the breakup fragments, as well as the total reaction cross section of their projectile, based on recently developed time-of-flight technique. Recent results of 16C case are presented. © 2004 Elsevier B.V. All right Resereved.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/j.nuclphysa.2004.03.023DOI ID：10.1016/j.nuclphysa.2004.03.023,
ISSN：0375-9474,
SCOPUS ID：3042596701 Study of basic nuclear properties of highly-charged, unstable nuclei at the SIS-FRS-ESR complex C Scheidenberger; F Attallah; K Beckert; P Beller; F Bosch; D Boutin; H Eickhoff; T Faestermann; M Falch; B Franczak; B Franzke; H Geissel; M Hausmann; M Hellstrom; E Kaza; T Kerscher; O Klepper; HJ Kluge; R Koyama; C Kozhuharov; KL Kratz; YA Litvinov; K Lobner; L Maier; M Matos; G Munzenberg; F Nolden; YN Novikov; T Ohtsubo; A Ostrowski; A Ozawa; Z Patyk; B Pfeiffer; M Portillo; W Quint; T Radon; Shishkin, V; J Stadlmann; M Steck; K Summerer; T Suzuki; MB Trzhaskovskaja; DJ Vieira; S Watanabe; H Weick; M Winkler; H Wollnik; T Yamaguchi
ACTA PHYSICA HUNGARICA NEW SERIES-HEAVY ION PHYSICS,
巻：19,
号：1-2,
開始ページ：165,
終了ページ：170, 2004年,
［査読有り］Recent progress in experiments with exotic nuclear beams at the SIS-FRS-ESR facility is summarized. New results on gross properties of exotic nuclei like binding energy, half-lives, and decay modes are presented. A brief outlook to future experiments is given.
AKADEMIAI KIADO ZRT, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1556/APH.19.2004.1-2.27DOI ID：10.1556/APH.19.2004.1-2.27,
ISSN：1219-7580,
Web of Science ID：WOS:000223070100027 Halo structure of B-17 studied via its reaction cross section Y Yamaguchi; T Suzuki; T Ohtsubo; T Izumikawa; W Shinozaki; M Takahashi; R Koyama; S Watanabe; C Wu; A Ozawa; T Ohnishi; DQ Fang; T Suda; R Kanungo; H Jeppesen; Tanihata, I; M Fukuda; N Iwasa
NEW ERA OF NUCLEAR STRUCTURE PHYSICS,
開始ページ：114,
終了ページ：118, 2004年,
［査読有り］The reaction cross section for the neutron-rich nucleus B-17 on a carbon target has been measured at an energy of 77 AMeV by a transmission method. A large enhancement of 17B reaction cross section at low energy was observed. The density distribution of 17B was deduced through the energy dependence of the reaction cross section together with high-energy data using a finite-range Glauber-model calculation under an optical-limit approximation. It is confirmed that the neutron-tail in the density distribution is necessary for 17B in order to reproduce the measured reaction cross sections. Based on the assumption of a core (B-15) plus valence two-neutron picture, the mixture of v(2s(1/2)) and V(1d(5/2)) was studied without treating the correlation between two neutrons.
WORLD SCIENTIFIC PUBL CO PTE LTD, 英語, 研究論文（国際会議プロシーディングス）
DOI：https://doi.org/10.1142/9789812702401_0017DOI ID：10.1142/9789812702401_0017,
Web of Science ID：WOS:000229961300017 One-neutron halo structure in 15C D. Q. Fang; T. Yamaguchi; T. Zheng; A. Ozawa; M. Chiba; R. Kanungo; T. Kato; K. Morimoto; T. Ohnishi; T. Suda; Y. Yamaguchi; A. Yoshida; K. Yoshida; I. Tanihata
Physical Review C - Nuclear Physics,
巻：69,
号：3,
開始ページ：1,
終了ページ：34613, 2004年
The one- or two-neutron removal reactions as well as reaction cross sections for 14,15C on carbon target have been studied by using 1104 MeV 22Ne primary beam on Riken Projectile Fragment Separator in RIKEN. The longitudinal momentum distributions of 13,14C fragments from 15C and 13C fragments from 14C breakup have been measured at 83A MeV by means of direct time-of-flight method. Full width at half maximum (FWHM) of the distributions have been determined to be 71±9 MeV/c and 223±28 MeV/c for 14C and 13C from 15C, and 195±21 MeV/c for 13C from 14C. The FWHM for 13C fragments from 15C and 14C breakup are consistent with the Goldhaber model's prediction. While the FWHM of 14C fragments from 15C is much smaller, which confirms the experimental results from MSU and GANIL, an anomalous enhancement from its neighbors has been observed in the measured reaction cross section of 15C. The experimental data are discussed in the framework of the Glauber model. The analysis of both the fragment momentum distributions and reaction cross sections indicates a dominant s-wave component in the ground state of 15C.
American Physical Society, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.69.034613DOI ID：10.1103/PhysRevC.69.034613,
ISSN：1089-490X,
CiNii Articles ID：120001370974,
SCOPUS ID：2442617219 Nuclear spin alignments and alignment correlation terms in mass A=8 system T Sumikama; T Iwakoshi; T Nagatomo; M Ogura; Y Nakashima; H Fujiwara; K Matsuta; T Minamisono; M Mihara; M Fukuda; K Minamisono; T Yamaguchi
HYPERFINE INTERACTIONS,
巻：159,
号：1-4,
開始ページ：281,
終了ページ：284, 2004年,
［査読有り］The pure nuclear spin alignments of Li-8 and B-8 were produced from the nuclear spin polarization applying the beta-NMR method. The alignment correlation terms in the beta-ray angular distribution were observed to test the G parity conservation in the nuclear beta decay.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1007/s10751-005-9112-5DOI ID：10.1007/s10751-005-9112-5,
ISSN：0304-3843,
SCOPUS ID：33645033065,
Web of Science ID：WOS:000235810200044 Momentum distfibutions of C-14 and C-15 fragments from C-16 breakup T Yamaguchi; T Zheng; A Ozawa; M Chiba; R Kanungo; T Kato; K Morimoto; T Ohnishi; T Suda; Y Yamaguchi; A Yoshida; K Yoshida; Tanihata, I
NUCLEAR PHYSICS A,
巻：724,
号：1-2,
開始ページ：3,
終了ページ：13, 2003年08月
The longitudinal momentum distributions of C-14 and C-15 fragments from C-16 breakup have been measured at 83 A MeV by means of recently-developed direct time-of-flight technique. The distributions are characterized by FWHM of 142 +/- 14 MeV/c and 90 +/- 9 MeV/c for C-14 and C-15, respectively. A Glauber-type analysis performed for the C-15 distribution gives the relative s-wave spectroscopic factor to be around 30%, which is smaller than that for the halo nucleus C-15 where the s-wave is dominant. The two-neutron removal cross section is found to be larger than the one-neutron cross section. (C) 2003 Elsevier B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0375-9474(03)01451-9DOI ID：10.1016/S0375-9474(03)01451-9,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000184254500001 G-parity irregular current in the β decays of the mass A = 12 system - With the refined empirical value of the weak magnetism K Minamisono; K Matsuta; T Minamisono; T Yamaguchi; T Sumikama; T Nagatomo; M Ogura; T Iwakoshi; M Mihara; M Fukuda; K Koshigiri; M Morita
Nuclear Physics A,
巻：721,
開始ページ：477C,
終了ページ：480C, 2003年06月,
［査読有り］The β-ray angular distribution from the purely spin aligned mirror pair of 12B and 12N were precisely remeasured and the G-parity irregular induced tensor coefficient in the weak nucleon axial vector current was determined to be 2MfT/fA = -0.15±0.12±0.05(theory) at a 90% confidence level. In the extraction of the result, the refined empirical value of the weak magnetism a = (4.04 ± 0.03)/2M and the theoretical calculation of the charge asymmetry in the axial charge Δy = 0.10 ± 0.05(theory) were used.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0375-9474(03)01103-5DOI ID：10.1016/S0375-9474(03)01103-5,
ISSN：0375-9474,
SCOPUS ID：17544391492,
Web of Science ID：WOS:000183938800090 Search for 21B
A. Ozawa; Y. Yamaguchi; M. Chiba; R. Kanungo; K. Kimura; S. Momota; T. Suda; T. Suzuki; I. Tanihata; T. Zheng; S. Watanabe; T. Yamaguchi; K. Yoshida
Physical Review C - Nuclear Physics, 巻：67, 号：1, 開始ページ：146101, 終了ページ：146105, 2003年01月
An attempt was made to find the very neutron-rich isotope 21B among the fragmentation of a 94A MeV 40Ar beam. Evidence for the particle instability of 21B was obtained. As part of the search, the production cross sections of 13 light neutron-rich nuclei with Be and Ta targets are presented and compared to previous data. A large enhancement of the production cross sections for a Ta target is shown and a clear energy dependence of the production cross sections is shown for very neutron-rich nuclei.
American Physical Society, 英語, 研究論文（学術雑誌）
ISSN：0556-2813, SCOPUS ID：0037242763
Recent investigation of the G-parity irregular weak nucleon current in β decays of spin aligned12B and12NK Minamisono; K Matsuta; T Minamisono; T Sumikama; T Nagatomo; M Ogura; T Iwakoshi; T Yamaguchi; M Fukuda; M Mihara; K Koshigiri; M Morita
Beyond the Desert 2002: Accelerator, Non-Accelerator and Space APproaches in the New Millenium - Proceedings of the 3rd International Conference on Particle Physics Beyond the Standard Model,
開始ページ：695,
終了ページ：700, 2003年
The G-parity irregular induced tensor form factor in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the β-ray angular distributions of the purely spin aligned mirror pair12B and12N. The coefficient of the induced tensor term was determined to be 2M fT/fA= -0.21 ± 0.09 (stat.) ± 0.07 (syst.) ± 0.05 (theory) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is 2MfT/ fA= -0.15 ± 0.12 ± 0.05 (theory) at a 90% confidence level. The obtained induced tensor coefficient is vanishingly small. In order to derive these numerical values from the experimental data the weak magnetism and axial charge, and also their charge dependence should be known. Theoretical investigation on these quantities is clearly described. Also we set constraints on the Kubodera-Delorme-Rho parameters from the present result together with the results of correlation-type experiments in the mass A = 8 and 20 systems as ζ = - (0.12 ± 0.14) × 10-3MeV-1and λ = + (0.30 ± 0.88) × 10-3in the 1 σ level.
IOP PUBLISHING LTD, 英語, 研究論文（国際会議プロシーディングス）
ISSN：0951-3248,
SCOPUS ID：4444332597,
Web of Science ID：WOS:000222945200048 Search for [Formula Presented] A. Ozawa; Y. Yamaguchi; M. Chiba; R. Kanungo; K. Kimura; S. Momota; T. Suda; T. Suzuki; I. Tanihata; T. Zheng; S. Watanabe; T. Yamaguchi; K. Yoshida
Physical Review C - Nuclear Physics,
巻：67,
号：1, 2003年,
［査読有り］An attempt was made to find the very neutron-rich isotope [Formula Presented] among the fragmentation of a [Formula Presented] [Formula Presented] beam. Evidence for the particle instability of [Formula Presented] was obtained. As part of the search, the production cross sections of 13 light neutron-rich nuclei with Be and Ta targets are presented and compared to previous data. A large enhancement of the production cross sections for a Ta target is shown and a clear energy dependence of the production cross sections is shown for very neutron-rich nuclei. © 2003 The American Physical Society.
研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.67.014610Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84878054748&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84878054748&origin=inwardDOI ID：10.1103/PhysRevC.67.014610,
ISSN：0556-2813,
eISSN：1089-490X,
SCOPUS ID：84878054748 Search for B-21 A Ozawa; Y Yamaguchi; M Chiba; R Kanungo; K Kimura; S Momota; T Suda; T Suzuki; Tanihata, I; T Zheng; S Watanabe; T Yamaguchi; K Yoshida
PHYSICAL REVIEW C,
巻：67,
号：1, 2003年01月,
［査読有り］An attempt was made to find the very neutron-rich isotope B-21 among the fragmentation of a 94A MeV Ar-40 beam. Evidence for the particle instability of B-21 was obtained. As part of the search, the production cross sections of 13 light neutron-rich nuclei with Be and Ta targets are presented and compared to previous data. A large enhancement of the production cross sections for a Ta target is shown and a clear energy dependence of the production cross sections is shown for very neutron-rich nuclei.
AMERICAN PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.67.014610DOI ID：10.1103/PhysRevC.67.014610,
ISSN：0556-2813,
eISSN：1089-490X,
Web of Science ID：WOS:000180943300045 Kanungo et al. Reply R. Kanungo; M. Chiba; N. Iwasa; S. Nishimura; A. Ozawa; C. Samanta; T. Suda; T. Suzuki; T. Yamaguchi; T. Zheng; I. Tanihata
Physical Review Letters,
巻：90,
号：15, 2003年,
［査読有り］A Reply to the Comment by Brown, Hansen, and Tostevin. © 2003 The American Physical Society.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevLett.90.159202DOI ID：10.1103/PhysRevLett.90.159202,
ISSN：1079-7114,
SCOPUS ID：85038277800 Study of halo structure of C-16 from reaction cross section measurement T Zheng; T Yamaguchi; A Ozawa; M Chiba; R Kanungo; T Kato; K Katori; K Morimoto; T Ohnishi; T Suda; Tanihata, I; Y Yamaguchi; A Yoshida; K Yoshida; H Toki; N Nakajima
NUCLEAR PHYSICS A,
巻：709,
開始ページ：103,
終了ページ：118, 2002年10月
The reaction cross sections for C-12,C-16 have been measured at the energy of 83 A MeV by a new experimental method. The larger enhancement of the C-16 reaction cross section at the low energy has been used to study the density distribution of 16C. The finite-range Glauber-model calculations for different density distributions have been compared with the experimental data. The analysis suggests that C-16 mainly has a C-14(core) + 2n structure and shows a strong contribution of (2s(1/2))(2) for valence neutrons. A large extension of the neutron density distribution to a distance far from the center of the nucleus suggests the formation of neutron halo in the C-16 nucleus. (C) 2002 Elsevier Science B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0375-9474(02)01043-6DOI ID：10.1016/S0375-9474(02)01043-6,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000178222300005 Recent studies on the nuclear moments of light mirror nuclei (T = 1/2, 3/2) K Matsuta; T Minamisono; M Fukuda; M Mihara; K Sato; K Minamisono; T Yamaguchi; T Onishi; Miyake, I; M Sasaki; M Tanigaki; T Ohtsubo; S Momota; Y Nojiri; K Yoshida; A Ozawa; Tanihata, I; A Kitagawa; M Torikoshi; M Kanazawa; S Koda; T Nishio; M Suda; Alonso, JR; GF Krebs; TJM Symons; SS Hanna
NUCLEAR PHYSICS A,
巻：704,
開始ページ：98C,
終了ページ：106C, 2002年06月,
［査読有り］Nuclear moments of several unstable nuclei with isospin T = 1/2 and 3/2, including exotic ones have been determined by the beta-NMR technique together with the polarized radioactive nuclear beams technique by the Osaka-RIKEN-HIMAC-LBL Collaboration. The results and their implications with respect to the nuclear structure of the unstable nuclei are discussed.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0375-9474(02)00770-4DOI ID：10.1016/S0375-9474(02)00770-4,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000177073200012 New limit of the G-parity irregular weak nucleon current detected in β decays of spin aligned 12B and 12N
K. Minamisono; K. Matsuta; T. Minamisono; T. Yamaguchi; T. Sumikama; T. Nagatomo; M. Ogura; T. Iwakoshi; M. Fukuda; M. Mihara; K. Koshigiri; M. Morita
Physical Review C - Nuclear Physics, 巻：65, 号：1, 開始ページ：155011, 終了ページ：1550117, 2002年
The G-parity irregular induced tensor form factor in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the β-ray angular distributions of the purely spin aligned mirror pair 12B(Iπ=1+, T1/2 = 20.2 ms) and 12N(Iπ=1+, T1/2 = 11.0 ms) in order to place a new limit on the applicability of the G-parity conservation law. The coefficient of the induced tensor term was determined to be 2MfT/fA= -0.21 ± 0.09 (stat.) ±0.07 (syst.)±0.05 (theory) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is 2MfT/fA = -0.15±0.12±0.05 (theory) at a 90% confidence level. The obtained induced tensor coefficient is vanishingly small and is consistent with the theoretical prediction based on QCD in the framework of which the induced tensor form factor is proportional to the mass difference between up and down quarks. Also we set constraints on the Kubodera-Delorme-Rho parameters from the present result together with the results of correlation-type experiments in the mass A = 8 and 20 systems as ζ = -(0.12±0.14) × 10-3 MeV-1 and λ = + (0.30±0.88) × 10-3 in the 1 σ level.
英語, 研究論文（学術雑誌）
ISSN：0556-2813, SCOPUS ID：4243616318
In-medium nucleon mass renormalization detected in [Formula Presented] decays of spin aligned [Formula Presented] and [Formula Presented] K. Minamisono; K. Matsuta; T. Minamisono; T. Yamaguchi; T. Sumikama; T. Nagatomo; M. Ogura; T. Iwakoshi; M. Fukuda; M. Mihara; K. Koshigiri
Physical Review C - Nuclear Physics,
巻：65,
号：1,
開始ページ：15, 2002年,
［査読有り］The axial charge in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the [Formula Presented]-ray angular distributions of the purely spin aligned mirror pair nuclei [Formula Presented] and [Formula Presented] The axial charge was determined to be [Formula Presented] [Formula Presented] at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is [Formula Presented] at a 90% confidence level. The axial charge is enhanced as much as [Formula Presented] from the impulse approximation model calculated value [Formula Presented] Calculations using the impulse approximation with the soft-[Formula Presented] contribution [Formula Presented] explain the data quite well but not completely. If we introduce the in-medium mass renormalization the unexplained part of the experimental result corresponds to an in nuclear-medium nucleon mass reduction of [Formula Presented] at a 90% confidence level relative to the free nucleon mass, at the place where the decaying nucleon resides. © 2001 The American Physical Society.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.65.015209DOI ID：10.1103/PhysRevC.65.015209,
ISSN：1089-490X,
SCOPUS ID：85035308364 New limit of the G-parity irregular weak nucleon current detected in [Formula Presented] decays of spin aligned [Formula Presented] and [Formula Presented] K. Minamisono; K. Matsuta; T. Minamisono; T. Yamaguchi; T. Sumikama; T. Nagatomo; M. Ogura; T. Iwakoshi; M. Fukuda; M. Mihara; K. Koshigiri; M. Morita
Physical Review C - Nuclear Physics,
巻：65,
号：1,
開始ページ：17, 2002年,
［査読有り］The G-parity irregular induced tensor form factor in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the [Formula Presented]-ray angular distributions of the purely spin aligned mirror pair [Formula Presented] ms) and [Formula Presented] ms) in order to place a new limit on the applicability of the G-parity conservation law. The coefficient of the induced tensor term was determined to be [Formula Presented] (stat.) ±0.07 (syst.)±0.05 (theory) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is [Formula Presented] (theory) at a 90% confidence level. The obtained induced tensor coefficient is vanishingly small and is consistent with the theoretical prediction based on QCD in the framework of which the induced tensor form factor is proportional to the mass difference between up and down quarks. Also we set constraints on the Kubodera-Delorme-Rho parameters from the present result together with the results of correlation-type experiments in the mass [Formula Presented] and 20 systems as [Formula Presented] and [Formula Presented] in the [Formula Presented] level. © 2001 The American Physical Society.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.65.015501DOI ID：10.1103/PhysRevC.65.015501,
ISSN：1089-490X,
SCOPUS ID：84873386324 Spin Manipulation by Use of Nuclear Quadrupole Interactions - Quarks and Medium Effects in the NucleusK. Minamisono; K. Matsuta; T. Minamisono; T. Yamaguchi; T. Sumikama; T. Nagatomo; M. Ogura; T. Iwakoshi; M. Mihara; M. Fukuda; K. Koshigiri; M. Morita
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences,
巻：57,
号：6-7,
開始ページ：557,
終了ページ：560, 2002年
The alignment correlation terms in the β-ray angular distributions from the purely spin aligned mirror pair 12B(Iπ = l+,T1/2 = 20.2ms) and 12N(Iπ = 1+,T1/2 = 11.0 ms) were precisely measured to place a new limit on the G-parity conservation law. For the creation of the alignment, the spin manipulation technique was applied, which utilized the nuclear quadrupole interactions. The G- parity violating induced tensor coefficient was determined to be 2M fT/FA = –0.15 ± 0.12 ± 0.05 (theor.), which is consistent with the theoretical prediction based on QCD in which 2M fT /FA is proportional to the mass difference between up and down quarks which constitute the nucleon. Also determined the axial charge to be y = 4.90 ± 0.10 (90% CL). From the result, we have found that the nucleon mass inside the nucleus is reduced (16 ± 4)% relative to the free nucleon mass. © 2014, Verlag der Zeitschrift für Naturforschung. All rights reserved.
英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1515/zna-2002-6-748DOI ID：10.1515/zna-2002-6-748,
ISSN：0932-0784,
SCOPUS ID：0036619010 In-medium nucleon mass renormalization detected in beta decays of spin aligned B-12 and N-12 K Minamisono; K Matsuta; T Minamisono; T Yamaguchi; T Sumikama; T Nagatomo; M Ogura; T Iwakoshi; M Fukuda; M Mihara; K Koshigiri
PHYSICAL REVIEW C,
巻：65,
号：1, 2002年01月,
［査読有り］The axial charge in the weak nucleon axial vector current ha, been precisely determined by measuring the alignment correlation terms in the beta-ray angular distributions of the purely spin aligned mirror pair nuclei B-12(l(pi) = 1(+), T-1/2 = 20.2 ms) and N-12(l(pi) = 1(+), T-1/2 = 11.0 ms). The axial charge was determined to be = 4.96+/-0.09 (stat.) +/- 0.05 (syst.) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result, The combined result is y = 4.90+/-0.10 at a 90% confidence level. The axial charge is enhanced as much as (72+/-4)% from the impulse approximation model calculated value y(1A)= 2.85. Calculations using the impulse approximation with the soft-pi contribution y(th) = 4.15 explain the data quite well but not completely. If we introduce the in-medium mass renormalization the unexplained part of the experimental result corresponds to an in nuclear-medium nucleon mass reduction of (16+/-4)% at a 90% confidence level relative to tire free nucleon mass, at the place where the decaying nucleon resides.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.65.015209DOI ID：10.1103/PhysRevC.65.015209,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000173308000051 New limit of the G-parity irregular weak nucleon current detected in beta decays of spin aligned B-12 and N-12 K Minamisono; K Matsuta; T Minamisono; T Yamaguchi; T Sumikama; T Nagatomo; M Ogura; T Iwakoshi; M Fukuda; M Mihara; K Koshigiri; M Morita
PHYSICAL REVIEW C,
巻：65,
号：1, 2002年01月,
［査読有り］The G-parity irregular induced tensor form factor in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the beta-ray angular distributions of the purely spin aligned mirror pair B-12(I-pi = 1(+), T-1/2 = 20.2 ms) and N-12(I-pi = 1(+) T-1/2 = 11.0 ms) in order to place a new limit on the applicability, of the G-parity conservation law, The coefficient of the induced tensor term as determined to be 2Mf(T)/f(A) = -0.21+/-0.09 (stat.) +/-0.07 (syst.)+/-0.05 (theory) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is 2Mf(T)/f(A) = - 0.15+/-0.12+/-0.05 (theory) at a 90% confidence level. The obtained induced tensor coefficient is vanishingly small and is consistent with the theoretical prediction based on QCD in the framework of which the induced tensor form factor is proportional to the mass difference between up and down quarks, Also we set constraints on the Kubodera-Delorme-Rho parameters from the present result together with the result,, of correlation-type experiments in the mass A = 8 and 20 systems as zeta = -(0.12+/-0.14) X 10(-3) MeV-1 and X = + (0.30+/-0.88) X 10(-3) in the 1sigma level.
AMER PHYSICAL SOC, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/PhysRevC.65.015501DOI ID：10.1103/PhysRevC.65.015501,
ISSN：2469-9985,
eISSN：2469-9993,
Web of Science ID：WOS:000173308000054 Search for a Z=118 Superheavy nucleus in the reaction of Kr beam with Pb target at RIKEN
K Morimoto; K Morita; Tanihata, I; N Iwasa; R Kanungo; T Kato; K Katori; H Kudo; T Suda; Sugai, I; S Takeuchi; F Tokanai; K Uchiyama; Y Wakasaya; T Yamaguchi; A Yeremin; A Yoneda; A Yoshida
4TH SYMPOSIUM ON NUCLEAR PHYSICS, 巻：561, 号：1, 開始ページ：354, 終了ページ：357, 2001年
We performed two search experiments for a Z = 118 Superheavy nucleus in the reactions of Kr-86 + Pb-208 and Kr-84 + Pb-208. We accumulated a dose of 2.1 x 10(18) ions and 2 x 10(18) ions, respectively. But we did not find any candidate of the evaporation residues with both experiments. A future plan proceeded by RIKEN Superheavy elements experimental group is also described.
AMER INST PHYSICS, 英語, 研究論文（国際会議プロシーディングス）
ISSN：0094-243X, Web of Science ID：WOS:000169066200036
G-parity violation of weak nucleon current and in-medium mass renormalization of nucleons detected through the β decays of spin aligned12B and12NK Minamisono; T Yamaguchi; T Sumikama; T Nagatomo; K Matsuta; T Minamisono; M Fukuda; K Koshigiri; M Morita
Nuclear Physics A,
巻：663,
開始ページ：951C,
終了ページ：954C, 2000年01月,
［査読有り］The β-ray angular distributions from purely spin aligned12B and12N were precisely measured to determine a new limit of the G-parity irregular induced tensor form factor in weak nucleon axial vector currents and to study the in-medium mass renormalization of nucleons through the axial charge. Since the major systematic error in the previous result which originated from the intensity fluctuation of the incident beam used for the production of the nuclei was removed in the present measurement, the more reliable result was obtained: 0.01 ≤ 2M fT/fA≤ 0.34 (90 % CL). The result is consistent with the theoretical prediction in the framework of which induced tensor form factor is proportional to the mass difference between the up and down quarks. We also determined the axial charge of the weak nucleon current to be y = 4.66 ± 0.12, which may disclose an in-medium mass reduction of the decaying nucleon of 11 ± 4 %.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
ISSN：0375-9474,
SCOPUS ID：18744430897,
Web of Science ID：WOS:000085920100193 New Limit of the G-Parity Irregular Induced Tensor Current and of the Axial Charge in the Weak Nucleon Current Detected in Alignment Correlation Terms of12B and12N β DecaysK. Minanisono; T. Yamaguchi; K. Matsuta; T. Minamisono; T. Ikeda; Y. Muramoto; M. Fukuda; Y. Nojiri; A. Kitagawa; K. Koshigiri; M. Morita
Nuclear Physics A,
巻：654,
号：1,
開始ページ：955C,
終了ページ：960C, 1999年07月,
［査読有り］The β-ray angular distributions from purely spin aligned12B and12N were precisely remeasured using a further refined spin-manipulation technique. We determined the amount of a G-parity violating induced tensor form factor in a weak axial vector current as 2M fT/fA= + 0.22 ± 0.05(stat) ± 0.15(syst) ± 0.05(theor.). The result is consistent with the theoretical prediction in the framework of which induced tensor form factor is proportional to the u- and d-quark mass difference. We also determined the axial charge of the weak nucleon current to be y = 4.66 ± 0.06(stat) ± 0.13(syst), which can be explained mainly in terms of the impulse value yIAand soft pion exchange effect yEX. There, however, remains 18 % unexplained part of the experimental value relative to the theoretical value yth= yIA+ yEX= 4.12. An in medium mass reduction of 12 ± 4 % may explain the unexplained part if there is such an effect for the decaying nucleon.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
ISSN：0375-9474,
eISSN：1873-1554,
SCOPUS ID：0033606637,
Web of Science ID：WOS:000218692300099 Quadrupole moments of short-lived beta-emitters O-13,O-19 and F-21 K. Sato; M. Tanigaki; T. Onishi; M. Fukuda; T. Minamisono; M. Mihara; K. Matsuta; S. Takeda; M. Sasaki; T. Yamaguchi; T. Miyake; K. Minamisono; A. Morishita; F. Osumi; Y. Muramoto; S. Oui; T. Fukao; Y. Matsumoto; T. Ohtsubo; S. Fukuda; Y. Nojiri; S. Momota; K. Yoshida; A. Ozawa; T. Kobayashi; I. Tanihata; A. Kitagawa; M. Torikoshi; H. Sagawa; H. Kitagawa; G. F. Krebs; J. R. Alonso; T. J. M. Symons
NUCLEAR PHYSICS A,
巻：654,
号：1,
開始ページ：735C,
終了ページ：738C, 1999年07月,
［査読有り］The quadrupole moments of the short-lived, beta-emitting nuclei O-13 (I-pi = 3/2(-), T-1/2 = 8.6 ms), O-19 (I-pi = 5/2(+), T-1/2 = 27 s) and F-21 (I-pi = 5/2(+), T-1/2 = 4.3 s) were determined to be |Q(O-13)| = 11.0 +/- 1.3 mb, |Q(O-19)| = 3.7 +/- 0.4 mb and |Q(F-21)| = 110 +/- 22 mb by detecting their beta-NMR. The present results are compared with the theoretical values obtained by the Hartree Fock calculations taking their one nucleon-separation energies into account.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0375-9474(00)88538-3DOI ID：10.1016/S0375-9474(00)88538-3,
ISSN：0375-9474,
eISSN：1873-1554,
Web of Science ID：WOS:000218692300057 Quadrupole moment of the proton drip-line nuclide O-13 K Matsuta; K Sato; M Fukuda; M Mihara; T Yamaguchi; M Sasaki; T Miyake; K Minamisono; M Tanigaki; T Ohtsubo; T Onishi; Y Nojiri; S Momota; S Fukuda; K Yoshida; A Ozawa; T Kobayashi; Tanihata, I; Alonso, JR; GF Krebs; TJM Symons; H Kitagawa; H Sagawa
PHYSICS LETTERS B,
巻：459,
号：1-3,
開始ページ：81,
終了ページ：85, 1999年07月
The quadrupole moment of the proton drip-line nuclide O-13(I-pi = 3/2(-),T = 3/2,T-1/2 = 8.6 ms) has been determined for the first time by detecting its P-NQR signal following the production of polarized O-13 through the projectile fragmentation process in the O-16 + Be collision. The quadrupole moment has been determined to be /Q(O-13)/ = 11.0 +/- 1.3 mb. The present result together with the quadrupole moment of its mirror partner B-13 is compared with the theoretical values obtained by the shell model code, OXBASH, and by the Hartree-Fock calculation with its single proton separation energy taken into account. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0370-2693(99)00620-6DOI ID：10.1016/S0370-2693(99)00620-6,
ISSN：0370-2693,
eISSN：1873-2445,
CiNii Articles ID：80011229009,
Web of Science ID：WOS:000081689500014 In-Medium Mass Renormalization of Nucleons Detected in the Axial Charges of theβDecays of Spin AlignedB12andN12Takayuki Yamaguchi
Physical Review Letters,
巻：80,
号：19,
開始ページ：4132,
終了ページ：4135, 1999年02月,
［査読有り］American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.82.1644DOI ID：10.1103/physrevlett.82.1644,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280293 Spin control of 12B and 12N and the axial charge from their β-ray spin-alignment correlationsT Yamaguchi; K Minamisono; T Ikeda; Y Muramoto; M Fukuda; K Matsuta; Y Nojiri; T Minamisono
Hyperfine Interactions,
巻：120,
号：1-8,
開始ページ：701,
終了ページ：705, 1999年,
［査読有り］The spin manipulation technique by use of the β-NMR is further refined, based on the recent thorough studies of hyperfine interactions of 12B and 12N in Mg. By using this technique, the alignment correlation terms in the β-ray angular distribution of the A = 12 system are precisely measured, so that the axial charge is singled out to be y = 4.66 ± 0.06 (stat.) ±0.13 (syst.) which shows clear mesonic enhancement over the impulse value.
SPRINGER, 英語, 研究論文（学術雑誌）
ISSN：0304-3843,
SCOPUS ID：0041543675,
Web of Science ID：WOS:000082617800118 Spin control and structure of weak nucleon currents in A=8, 12, 20 and 41K Minamisono; T Yamaguchi; K Matsuta; T Minamisono; T Ikeda; Y Muramoto; M Fukuda; Y Nojiri; A Kitagawa; K Koshigiri; M Morita
HYPERFINE INTERACTIONS,
巻：120,
号：1-8,
開始ページ：707,
終了ページ：712, 1999年,
［査読有り］The beta-ray angular distributions from purely spin aligned B-12 and N-12 were precisely remeasured using a further refined spin-manipulation technique. We determined the amount of a G-parity violating induced tensor form factor in a weak axial vector current as 2M f(T)/f(A) = +0.22 +/- 0.05 (stat.) +/- 0.15 (syst.) +/- 0.05 (theor.). The result is consistent with the theoretical prediction in the framework of which induced tensor form factor is proportional to u- and d-quark mass difference. To study the G-parity violation in weak nucleon current systematically, we have started to measure the alignment correlation terms of Li-8, B-8, F-20 and Sc-41.
SPRINGER, 英語, 研究論文（学術雑誌）
ISSN：0304-3843,
SCOPUS ID：0041543672,
Web of Science ID：WOS:000082617800119 Sign of the quadrupole moment of proton drip-line nucleus B-8T Yamaguchi; K Sato; C Ha; A Morishita; K Tanaka; T Miyake; M Sasaki; K Minamisono; H Akai; M Mihara; M Fukuda; K Matsuta; Y Nojiri; T Minamisono
HYPERFINE INTERACTIONS,
巻：120,
号：1-8,
開始ページ：689,
終了ページ：694, 1999年
The sign of the quadrupole coupling constant eqQ of B-8 in ZrB2 is determined to be positive through the beta-delayed alpha-ray anisotropy measurement combined with the spin manipulation technique by use of the beta-NMR. According to the theoretical calculation of the electric field gradient in ZrB2, the sign of the quadrupole moment of B-8 is deduced to be positive.
SPRINGER, 英語, 研究論文（学術雑誌）
ISSN：0304-3843,
SCOPUS ID：0001287338,
Web of Science ID：WOS:000082617800116 Knight shifts for short-lived beta emitters in Pt K. Matsuta, T. Minamisono, T. Tanigaki, T. Onishi, M. Fukuda, M. Mihara, H. Akai, M. Sasaki, T. Yamaguchi, T. Miyake, K. Sato, K. Minamisono, C. Ha, K. Tanaka, K. Kidera, A. Morishita, S. Momota, S. Kaminaka, T. Tsubota, T. Sumikama, A. Kitagawa, M. Torikoshi, M. Kanazawa, T. Nishio, S. Kouda, T. Ohtsubo, Y. Nojiri, S. Momota, S.S. Hanna, J.R. Alonso, G.F. Krebs, T.J.M. Symons
Hyp. Interact,
巻：120/121,
号：1-8,
開始ページ：719,
終了ページ：723, 1999年,
［査読有り］The Knight shifts K for short-lived β emitters 12N and 27Si implanted in Pt have been measured by means of β-NMR technique. The results were K(12N in Pt) = +(5.8 ± 2.1) × 10-4 and K(27Si in Pt) = +(1.4 ± 0.8) × 10-3. The spin-lattice relaxation time T1 was measured for 12N in Pt. The result was T1(12N in Pt, T = 300 K) = 66 ± 8 ms, thus, T1T = 20 ± 2 Ks. The present Knight shifts are in good agreement with the KKR band structure calculation with local lattice relaxation determined theoretically.
研究論文（学術雑誌）
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0042045064&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=0042045064&origin=inwardISSN：0304-3843,
SCOPUS ID：0042045064 Spin polarization of beta emitting fragments in high energy heavy ions on Be collisions K. Matsuta, T. Onishi, M. Fukuda, T. Minamisono, M. Mihara, M. Sasaki, T. Yamaguchi, T. Miyake, K. Sato, K. Minamisono, F. Ohsumi, M. Muramoto, S. Oui, C. Ha, K. Tanaka, K. Kidera, A. Morishita, S. Momota, T. Tsubota, T. Sumikama, A. Kitagawa, M. Torikoshi, M. Kanazawa, T. Nishio, S. Kouda, T. Ohtsubo, S. Fukuda, Y. Nojiri, S. Momota, A. Ozawa, K. Yoshida, T. Suzuki, T. Kobayashi, I. Tanihata, S.S. Hanna, J.R. Alonso, G.F. Krebs, T.J.M. Symons
Hyp. Interact.,
巻：120/121,
号：1-8,
開始ページ：713,
終了ページ：717, 1999年,
［査読有り］The degrees of nuclear spin polarization of B-8,B-12, C-9, N-12, O-13, F-20,F-21, Mg-23, Si-27 and Ca-39 produced in the high energy C-12,C-13, O-16, Ne-22, Mg-24, Si-28 and Ca-40 ions on Be collisions have been measured systematically, for the technical developments of the nuclear moment studies as well as the hyperfine interaction studies by means of beta-NMR technique. The fragment momentum dependences were well reproduced by the simple kinematical model. Incident energy dependence and the mass dependence as well as the reaction angle dependences were qualitatively explained by the mixing of the near and far side collisions.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1023/A:1017000429243DOI ID：10.1023/A:1017000429243,
ISSN：0304-3843,
Web of Science ID：WOS:000082617800120 Electromagnetic moments of short lived beta emitters F-21, Mg-23, Si-27 and Ca-39 K Matsuta; T Onishi; M Fukuda; T Minamisono; H Akai; M Sasaki; T Yamaguchi; T Miyake; K Sato; K Minamisono; F Ohsumi; Y Muramoto; S Oui; C Ha; K Tanaka; K Kidera; A Morishita; A Kitagawa; M Torikoshi; M Kanazawa; T Nishio; S Koda; T Ohtsubo; S Fukuda; Y Nojiri; S Momota; A Ozawa; K Yoshida; T Suzuki; T Kobayashi; Tanihata, I; SS Hanna; Alonso, JR; GF Krebs; TJM Symons
HYPERFINE INTERACTIONS,
巻：120,
号：1-8,
開始ページ：673,
終了ページ：677, 1999年
The beta-NMR spectra of F-21, Mg-23, Si-27 and Ca-39 which were produced in heavy ion collisions and implanted in various crystals have been observed. The magnetic moments of F-21 and Si-27 were determined to be \mu(F-21)\ = 3.9194 +/- 0.0012 mu(N) and \mu(Si-27)\ = 0.8653 +/- 0.0003 mu(N), respectively. The electric quadrupole coupling constants were determined for the first time to be \eqQ(F-21 in MgF2)/h\ = 9.94 +/- 0.09 MHz, \eqQ(Mg-23 in MgF2)/h\ = 1.96 +/- 0.06 MHz, \eqQ(Si-27 in Al2O3)/h\ = 1.90 +/- 0.12 MHz, \eqQ(Ca-39 in CaCO3)/h\ = 0.60 +/- 0.04 MHz. From the present eqQ/h, the Q moments were deduced as \Q(F-21)\ = 110 +/- 22 mb, \Q(Mg-23)\ = 114 +/- 3 mb, \Q(Si-27)\ = 60 +/- 13 mb and \Q(Ca-39)\ = 36 +/- 7 mb. The present data were compared with the theoretical values obtained by the OXBASH shell model code.
SPRINGER, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1023/A:1017036009679DOI ID：10.1023/A:1017036009679,
ISSN：0304-3843,
Web of Science ID：WOS:000082617800113 New Limit of theG-Parity Irregular Weak Nucleon Current Disclosed inβ-Ray Angular Distributions from Spin AlignedB12andN12Takayuki Yamaguchi
Physical Review Letters,
巻：82,
号：8,
開始ページ：1644,
終了ページ：1647, 1998年05月,
［査読有り］American Physical Society (APS), 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1103/physrevlett.80.4132DOI ID：10.1103/physrevlett.80.4132,
ISSN：0031-9007,
eISSN：1079-7114,
ORCID：80280305 Quadrupole moment of the proton rich β-emitting nucleus 12N T. Minamisono; T. Ohtsubo; K. Sato; S. Takeda; S. Fukuda; T. Izumikawa; M. Tanigaki; T. Miyake; T. Yamaguchi; N. Nakamura; H. Tanji; K. Matsuta; M. Fukuda; Y. Nojiri
Physics Letters B,
巻：420,
号：1-2,
開始ページ：31,
終了ページ：36, 1998年02月,
［査読有り］The quadrupole moment of the β-emitter 12N(Iπ = 1 +,T1/2 = 11 ms) has been measured to be Q(12N) = +9.8 ± 0.9 mb by use of a modified β-NMR method. The present result is 3 times smaller than the value which was deduced from the photoproduction cross-section of pions on 12C, while it is twice the shell-model prediction based on the Cohen-Kurath wave functions in the Woods-Saxon potential. © 1998 Elsevier Science B.V.
Elsevier BV, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/s0370-2693(97)01553-0Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0347721365&origin=inwardScopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=0347721365&origin=inwardDOI ID：10.1016/s0370-2693(97)01553-0,
ISSN：0370-2693,
SCOPUS ID：0347721365 Interdisciplinary regions of nuclear physics studied by use of spin-polarized short-lived nuclei T Minamisono; K Matsuta; T Yamaguchi; K Minamisono; T Ikeda; Y Muramoto; M Fukuda; Y Nojiri
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,
巻：402,
号：2-3,
開始ページ：218,
終了ページ：223, 1998年01月
The creation of nuclear spin polarization is the first step for correlation-type experiments in which correlations between the polarization and out going radiations is detected. Of particular interest is to extract clear non-nucleonic degrees of freedom and to test the conservation laws in weak nuclear currents.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/S0168-9002(97)00838-3DOI ID：10.1016/S0168-9002(97)00838-3,
ISSN：0168-9002,
SCOPUS ID：0031646367,
Web of Science ID：WOS:000071718800010 Hyperfine interaction of O-13 and Mg-23 implanted in Pt K Matsuta; M Fukuda; M Tanigaki; T Minamisono; Y Nojiri; H Akai; T Izumikawa; M Nakazato; M Mihara; T Yamaguchi; A Harada; M Sasaki; T Miyake; T Onishi; K Minamisono; T Fukao; K Sato; Y Matsumoto; T Ohtsubo; S Fukuda; K Yoshida; A Ozawa; S Momota; T Kobayashi; Tanihata, I; Alonso, JR; GF Krebs; TJM Symons
HYPERFINE INTERACTIONS,
巻：97-8,
号：1-4,
開始ページ：501,
終了ページ：508, 1996年,
［査読有り］The spin relaxation time T-1 for short-lived beta emitters O-13 and Mg-23 implanted in Pt have been measured for the first time; T1T(O-13) = 2.90 +/- 0.65 Ks and T1T( Mg) = 1665 +/- 140 Ks. The Knight shift for O-13 in Pt was measured at 300 K to be K(O-13) = +(4.23 +/- 0.14) x 10(-3). In the case of O-13, the Knight shift is unusually large and the relaxation time is unusually fast compared with other interstitial impurities in Pt. A KKR band-structure calculation reproduces the present large Knight shift fairly well.
BALTZER SCI PUBL BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1007/BF02150192DOI ID：10.1007/BF02150192,
ISSN：0304-3843,
Web of Science ID：WOS:A1996UD20800030 Magnetic moments of proton drip-line nuclei O-13 and C-9 K Matsuta; T Minamisono; M Tanigaki; M Fukuda; Y Nojiri; M Mihara; T Onishi; T Yamaguchi; A Harada; M Sasaki; T Miyake; K Minamisono; T Fukao; K Sato; Y Matsumoto; T Ohtsubo; S Fukuda; S Momota; K Yoshida; A Ozawa; T Kobayashi; Tanihata, I; Alonso, JR; GF Krebs; TJM Symons
HYPERFINE INTERACTIONS,
巻：97-8,
号：1-4,
開始ページ：519,
終了ページ：526, 1996年,
［査読有り］The magnetic moments of the proton drip-line nuclei O-13(I-pi = 3/2(-), T-1/2 = 8.6 ms) and C-9(I-pi = 3/2(-), T-1/2 126 ms) have been determined for the first time through the combined techniques of polarized radioactive nuclear beams and beta-NMR detection. The observed magnetic moments are \mu(O-13)\ = 1.3891 +/- 0.0003 mu(N) and \mu(C-9)\ = 1.3914 +/- 0.0005 mu(N). Spin expectation values (sigma) are deduced to be 0.76 and 1.44 for O-13 and C-9, respectively. While the (sigma) of O-13 is consistent with the systematics from isospin T = 1/2 mirror pairs, the (sigma) of C-9 is unusually large, even far larger than the single particle value, (sigma) = 1.
BALTZER SCI PUBL BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1007/BF02150194DOI ID：10.1007/BF02150194,
ISSN：0304-3843,
Web of Science ID：WOS:A1996UD20800032 MAGNETIC-MOMENT OF PROTON DRIP-LINE NUCLEUS C-9 K MATSUTA; M FUKUDA; M TANIGAKI; T MINAMISONO; Y NOJIRI; M MIHARA; T ONISHI; T YAMAGUCHI; A HARADA; M SASAKI; T MIYAKE; S FUKUDA; K YOSHIDA; A OZAWA; T KOBAYASHI; TANIHATA, I; ALONSO, JR; GF KREBS; TJM SYMONS
NUCLEAR PHYSICS A,
巻：588,
号：1,
開始ページ：C153,
終了ページ：C156, 1995年05月
The magnetic moment of the proton drip-line nucleus C-9(I-pi=3/2-,T-1/2=126 ms) has been measured for the first time, using the beta-NMR detection technique with polarized radioactive beams. The measured value for the magnetic moment is \mu(C-9)\=1.3914+/-0.0005 mu(N). The deduced spin expectation value <sigma> of 1.44 is unusually larger than any other ones of even-odd nuclei.
ELSEVIER SCIENCE BV, 英語, 研究論文（学術雑誌）
DOI：https://doi.org/10.1016/0375-9474(95)00115-HDOI ID：10.1016/0375-9474(95)00115-H,
ISSN：0375-9474,
SCOPUS ID：58149318584,
Web of Science ID：WOS:A1995RC09500028
Rare RI Ring Facility: tool of precision mass spectrometry of short-lived nuclei
T. Yamaguchi
The German Physical Society Spring Meeting 2025, ［招待有り］
2025年03月 - 2025年03月
Present and future of the Rare RI Ring Facility at RIBF
T. Yamaguchi
11th International conference on nuclear physics at storage rings (STORI24), ［招待有り］
2024年12月 - 2024年12月
Status and Future of R3
T. Yamaguchi
Collaboration meeting Nuclear astrophysics with storage rings (NUCAR), ［招待有り］
2024年12月 - 2024年12月
Experiments of highly charged ions stored in ESR
T. Yamaguchi
第2回「新しいスキンを考える会」, ［招待有り］
2024年11月 - 2024年11月
Rare RI Ring Facility Experiments with stored rare isotopes
T. Yamaguchi
理研-IMPシンポジウム, ［招待有り］
2024年11月 - 2024年11月
Evaluation of momentum and angular dispersion of 208Pb ion trapped on SCRIT using ion analyzer simulation
Y. Kikuchi
LEES2024, Sendai workshop on “Low-Energy Electron Scattering for Nucleon and Exotic Nuclei”
2024年10月 - 2024年11月, ポスター発表
蓄積リングによる高エネルギービーム多価イオン状態の原子核の崩壊
T. Yamaguchi
日本物理学会 第79回年次大会 シンポジウム, 2024年09月, ［招待有り］
稀少RIリングにおける共鳴型Schottky検出器の性能評価
滝浦一樹
第21回日本加速器学会年会
2024年07月 - 2024年08月, ポスター発表
RI beam experiments with fragment separator and storage ring
T. Yamaguchi
International workshop on nuclear physics related to HIAF, ［招待有り］
2024年04月 - 2024年04月
New physics opportunities at the Rare-RI Ring facility
T. Yamaguchi
2024年01月, ［国際会議］
高エネルギー重イオンビームの荷電変化反応の研究
山口貴之
2023年12月, ［国内会議］
Present status of the storage-ring mass spectrometer at RIBF
T. Yamaguchi
2023年11月, ［国際会議］
Challenge to exotic nuclei-Rare RI storage ring facility at RIBF
T. Yamaguchi
2023年11月, ［国際会議］
多価イオンビームによる2光子稀崩壊の観測
山口貴之
2023年10月, ［国内会議］
Present status of the Rare-RI Ring Facility
T. Yamaguchi
2023年09月, ［国際会議］
Observation of radiative vibrational cooling of N2O+ ions using a cryogenic electrostatic ion storage ring: contribution of Fermi resonance
S. Harayama
2023年07月, ［国際会議］
Storage ring facilities for radioactive ions new detectors and upgrade plans
T. Yamaguchi
2023年06月, ［国際会議］
中高エネルギー重イオンビームの飛行時間と位置測定のための新しい検出器の開発
山口貴之
2022年12月, ［国内会議］
アイソマービームの断面積測定実験計画２：蓄積リングを利用した反応実験
山口貴之
2022年11月, ［国内会議］
高エネルギー重イオンビームによる粒子検出器の開発と荷電変化反応の研究
山口貴之
2021年12月, ［国内会議］
Precision experiments of exotic nuclei at the storage rings
T. Yamaguchi
2021年09月, ［国際会議］
New experimental plan and detector R&D at the Rare-RI Ring facility
T. Yamaguchi
China-Japan Collaboration Workshop on "Nuclear Mass and Life for Unraveling Mysteries of R-process”, 2019年10月, ［国際会議］
2019年10月 - 2019年10月
ILIMA status report and phase-0 program
T. Yamaguchi
Nuster Week 2019, 2019年09月, ［国際会議］
2019年09月 - 2019年09月
Status of RIKEN Ring
山口貴之
NucAR collaboration meeting, 2019年03月, ［国際会議］
2019年03月 - 2019年03月
Rare-RI Ring project in RIKEN and a proposal at CSRe
山口貴之
Symposium on Precision Physics Experiments with Stored Highly Charged Ions at Low Energies, 2018年08月, ［国際会議］
2018年08月 - 2018年08月
Precision mass spectrometry of stored exotic nuclei
山口貴之
2018年06月, ［国内会議］
Storage ring experiments in Japan
NucAR collaboration meeting
2018年03月 - 2018年03月
Storage-ring mass spectrometry of exotic nuclei
T. Yamaguchi
International symposium on RI beam physics in the 21st century: 10th anniversary of RIBF, 2017年12月, ［国際会議］
2017年12月 - 2017年12月
ILIMA project: isomeric beams, lifetimes and masses at the FAIR storage rings
T. Yamaguchi
10th International Conference on Nuclear Physics at Storage Rings, 2017年11月, ［国際会議］
2017年11月 - 2017年11月
ILIMA status report
T. Yamaguchi
NUSTAR week 2017, 2017年09月, ［国際会議］
2017年09月 - 2017年09月
Storage-ring mass spectrometry at GSI/FAIR
山口貴之
2017年09月, ［国内会議］
Rare-RI Ring at RIKEN present status
T. Yamaguchi
2017年02月, ［国際会議］
RI beam experiments with storage rings -present and future-
International Symposium on Interplay between Hadronic, Nuclear and Atomic Physics
2016年07月 - 2016年07月
RI beam experiments with storage rings -present and future-
山口貴之
2016年07月, ［国内会議］
稀少RIリングによるrプロセス核の質量測定計画
山口貴之
2016年02月, ［国内会議］
荷電変化反応による陽子分布半径の測定
山口貴之
2016年01月, ［国内会議］
きわめて不安定な原子核の表面にあらわれる中性子層核物質の探索によるEOSへの挑戦
山口貴之
2015年09月, ［国内会議］
Present status of the Rare-RI Ring facility at RIBF
T. Yamaguchi
STORI’14 - 9th International Conference on Nuclear Physics at Storage Rings, 2014年09月, ［国際会議］
2014年09月 - 2014年10月
A resonant Schottky pick-up for Rare-RI Ring at RIKEN
F. Suzaki
2014年09月, ［国際会議］
Electron capture of 140Pr and feasibility of storage ring experiments at RIKEN
T. Yamaguchi
EMMI Rapid Reaction Task Force, Non-Exponential Two-Body Weak Decays, 2014年07月, ［国際会議］
2014年07月 - 2014年07月
Pulse Shape Analysis Using Flash-ADC for Short-lived Decay of Super Heavy Elements
S. Yamaki
2014年06月, ［国際会議］
Performance of a resonant Schottky pick-up for the Rare-RI Ring project
F.Suzaki
2014年06月, ［国際会議］
Cherenkov light detection as a velocity selector for uranium fission products at intermediate energies
T. Yamaguchi
2013年12月, ［国際会議］
Rare-RI Ring project in RIKEN
T. Yamaguchi
Sino-German Symposium on "High precision experiments with stored exotic and stable nuclei", 2013年11月, ［国際会議］
2013年11月 - 2013年11月
Storage-ring mass spectrometry in Japan
Fumi Suzaki
2013年07月, ［国際会議］
Charge-changing interactions probing point-proton radii of nuclei
T. Yamaguchi
2013年07月, ［国際会議］
Charge-changing interactions probing point-proton radii of nuclei
INPC2013 International Nuclear Physics Conference
2013年06月 - 2013年06月
Rare-RI Ring project: atomic masses on the r-process
T. Yamaguchi
Astrophysics with ion storage rings (WE-Heraeus-Seminar), 2013年01月, ［国際会議］
2013年01月 - 2013年01月
Systematic study on individual charge-changing cross-sections of intermediate-energy secondary beams
T. Yamaguchi
EMIS2012, 2012年, ［国際会議］
2012年12月 - 2012年12月
Detector developments for storage ring experiments
T. Yamaguchi
TSR-ISOLDE Workshop, 2012年, ［国際会議］
2012年10月 - 2012年10月
反応断面積による不安定核のハロー・スキン構造研究の新展開
山口貴之
2012年03月
Charge changing interactions of stable and unstable nuclei
T. Yamaguchi
RIBF miniワークショップ, 2012年, ［国際会議］
Design study of a resonant Schottky pick-up for Rare-RI Ring project
F. Suzaki
EMIS2012, 2012年, ［国際会議］
Performance of high-resolution position-sensitive detectors developed for storage-ring decay experiments
T. Yamaguchi
EMIS2012, 2012年, ［国際会議］
Developments for future experiments in the storage rings
T. Yamaguchi
Workshop on Physics of Rare-RI Ring, 2011年11月
2011年11月 - 2011年11月
Reaction cross sections of neutron-rich carbon isotopes and related topics
T. Yamaguchi
2011年
Detector developments and ideas for storage ring experiments
T. Yamaguchi
TSR-ISOLDE Workshop, 2010年
2010年10月 - 2010年10月
Precision experiments of stored exotic nuclei
T. Yamaguchi
2010年
Status of Rare-RI Ring at RIBF
T. Yamaguchi
2009年03月
Decay curve study in a standard electron capture decay
T.Yamaguchi
2009年
Storage ring mass spectroscopy
T. Yamaguchi
2008年05月
Beam optics simulation of rare-RI ring at RI beam factory in RIKEN
T. Yamaguchi
International Journal of Physics E, 2008年
New scheme for precision mass measurement of rare isotopes produced at RI Beam Factory
T. Yamaguchi
2007年09月
Development of a Time-of-Flight detector for the Rare-RI Ring project at RIKEN
T. Yamaguchi
2007年06月
Proton skin in neutron deficient nuclei studied via interaction cross sections at relativistic energies
T. Yamaguchi
AIP Conference Proceedings, 2007年06月
Precision measurements of the reaction cross sections for the A=3 mirror nuclei at intermediate energies
T. Yamaguchi
2007年06月
Nuclear radius systematics around N=Z Kr isotopes studied via their interaction cross sections at relativistic energies
T. Yamaguchi
2006年07月
Mass measurements by an isochronous storage ring at the RIKEN RI beam factory
T. Yamaguchi ほか
Schriften des Forschungszentrums Julich, Matter and Materials, 2005年05月
