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arXiv 1402.5944nucl-exnucl-th
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N=40 ~(60)Ca的原子核结构:~(58),~(60)Ti的在束gamma-ray谱

Nuclear Structure Towards N=40 60Ca: In-beam gamma-ray Spectroscopy of 58,60Ti

A. Gade, R. V. F. Janssens, D. Weisshaar, B. A. Brown, E. Lunderberg, M. Albers, V. M. Bader, T. Baugher, D. Bazin, J. S. Berryman, C. M. Campbell, M. P. Carpen… 展开作者

A. Gade, R. V. F. Janssens, D. Weisshaar, B. A. Brown, E. Lunderberg, M. Albers, V. M. Bader, T. Baugher, D. Bazin, J. S. Berryman, C. M. Campbell, M. P. Carpenter, C. J. Chiara, H. L. Crawford, M. Cromaz, U. Garg, C. R. Hoffman, F. G. Kondev, C. Langer, T. Lauritsen, I. Y. Lee, S. M. Lenzi, J. T. Matta, F. Nowacki, F. Recchia, K. Sieja, S. R. Stroberg, J. A. Tostevin, S. J. Williams, K. Wimmer, S. Zhu

摘要:

在能量为90 MeV/核子的\nuc{61}{V}射弹的去核反应中,丰中子N= 38,36核\nuc{60}{Ti}和\nuc{58}{Ti}中的激发态被布居.用先进的γ射线跟踪阵列GRETINA探测了这些Ti同位素中这些态的γ射线跃迁,并使用在线信号分解得到的γ射线相互作用点对大多普勒频移(v/c \sim 0. 4)进行了逐事件校正。新的数据表明,当从富中子的N= 36,38 Fe和Cr向Ti和Ca同位素移动时,四极集体发生急剧下降。事实上,\nuc{58,60}{Ti}提供了一些当今最富中子的基准,用于试图确定潜在双魔核\nuc{60}{Ca}的结构的计算。

英文摘要:

Excited states in the neutron-rich N=38,36 nuclei \nuc{60}{Ti} and \nuc{58}{Ti} were populated in nucleon-removal reactions from \nuc{61}{V} projectiles at 90~MeV/nucleon. The γ-ray transitions from such states in these Ti isotopes were detected with the advanced γ-ray tracking array GRETINA and were corrected event-by-event for large Doppler shifts (v/c \sim 0.4) using the γ-ray interaction points deduced from online signal decomposition. The new data indicate that a steep decrease in quadrupole collectivity occurs when moving from neutron-rich N=36,38 Fe and Cr toward the Ti and Ca isotones. In fact, \nuc{58,60}{Ti} provide some of the most neutron-rich benchmarks accessible today for calculations attempting to determine the structure of the potentially doubly-magic nucleus \nuc{60}{Ca}.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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