丰中子奇A核~(145,147)Ce的集体带结构

• 作 者: M.萨哈伊 朱胜江 甘翠云 朱凌燕 杨利明 许瑞清 全明吉 姜卓 张征 J. H. Hamilton A. V. Ramayya B. R. S. Babu J. K. Hwang W. C. Ma J. Komicki J. D. Cole R. Aryaeinejad M. W. Drigert J. O. Rasmussen M. A. Stoyer S. Y. Chu K E. Greg
• 机 构: 清华大学物理系!北京100084,清华大学物理系!北京100084,清华大学物理系!北京100084,清华大学物理系!北京100084,清华大学物理系!北京100084,清华大学物理系!北京10008
• 出 处: 高能物理与核物理
• 发表日期: 2000年11期
• 关键词: 带结构 核结构 中子 Ce 集体带 高自旋态 自发裂变 组态混合 基态 能级

通过对２５２Ｃｆ自发裂变产生的瞬发γ谱的测量，对丰中子奇Ａ核１４５，１４７Ｃｅ的高自旋态进行了研究，首次识别了１４５Ｃｅ的集体带结构，扩展了１４７Ｃｅ的集体带结构，扩展了１４７Ｃｅ的能级，并新识别了３个边带，粒子－转子模型的计算指出，１４５，１４７Ｃｅ的晕带可能来自于νｉ１３／２轨道的耦合，１４５Ｃｅ基态起源于（νｈ９／２νｆ７／２）组态混合，而１４７Ｃｅ基态则起源于νｈ９／２轨道．在这两个核中未观测到明显的八极形变带，然而，在１４７Ｃｅ中观测到的一个边带，可能显露出八极关联的迹象．

Based on the measurement of the instantaneous γ-spectrum generated by spontaneous fission of 252Cf, the high spin states of the 145,147Ce of the A-rich neutron neutron have been studied. For the first time, the 145Ce collective band structure has been identified and the 147Ce collective band structure has been extended. 147Ce, and newly identified three sidebands. The calculation of the particle-rotor model indicates that the halo of 145,147Ce may come from the coupling of νi13 / 2 orbital, and the ground state of 145Ce originates from (νh9 / 2νf7 / 2) State, while the 147Ce ground state originates from νh9 / 2 orbitals. No significant octagonal bands were observed in either of these nuclei, however, a side band observed in 147 Ce may reveal signs of octupole association.