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Zhang, M. M.*; Tian, Y. L.*; Wang, Y. S.*; Zhang, Z. Y.*; Gan, Z. G.*; Yang, H. B.*; Huang, M. H.*; Ma, L.*; Yang, C. L.*; Wang, J. G.*; et al.
Physical Review C, 106(2), p.024305_1 - 024305_6, 2022/08
被引用回数:1 パーセンタイル:34.54(Physics, Nuclear)The extremely neutron-deficient even-even uranium isotopes U were produced in the complete-fusion reactions induced by impinging Ar and Ca ions on W targets. Fusion evaporation residues were separated in flight by the gas-filled recoil separator SHANS (Spectrometer for Heavy Atoms and Nuclear Structure) and subsequently identified using the recoil--correlation method. In this paper, we report on new -decay activities with keV for U and keV for U, which decay from the 8 isomeric states of U into the 2 states of their daughter nuclei Th, respectively. The new results extend the systematics of the -decay fine structure for the = 124 and 126 even-even isotones.
Day Goodacre, T.*; Afanasjev, A. V.*; Barzakh, A. E.*; Marsh, B. A.*; Sels, S.*; Ring, P.*; 中田 仁*; Andreyev, A. N.; 他36名*
Physical Review Letters, 126(3), p.032502_1 - 032502_7, 2021/01
被引用回数:27 パーセンタイル:94.67(Physics, Multidisciplinary)The charge radii of Hg have been studied for the first time and those of Hg remeasured by laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the = 126 shell closure has been revealed, providing the first information on its behavior below the = 82 shell closure. By a theoretical analysis, it is demonstrated, contrary to previous interpretations, that both the kink at = 126 and the odd-even staggering can be described predominantly at the mean-field level and that pairing does not need to play a crucial role in their origin.
今井 憲一; 市川 裕大; 長谷川 勝一; 佐甲 博之; 佐藤 進; 木内 隆太*; 細見 健二; 杉村 仁志; 他36名*
Few-Body Systems, 54(7-10), p.1191 - 1194, 2013/08
被引用回数:11 パーセンタイル:58.46(Physics, Multidisciplinary)反応を用いてJ-PARCのK1.8ビームラインで束縛状態の探索を行っている(J-PARC E27実験)。この実験では、エネルギー分解能約2MeV/cの制度で、束縛状態の束縛エネルギー及び崩壊幅をミッシングマス分光により求められる。また、準自由過程のハイペロン生成のバックグラウンドを除去するために、飛程検出器を用いての崩壊から生じる2つの陽子の検出も同時に行った。2012年6月に本実験のデータ収集を行い、初めて反応のミッシングマススペクトルを取得することに成功した。