摘要
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．
Through study of the prompt r-rays emitted in the spontaneous fission of 252Cf, high spin states of neutron-rich odd-A 145,147 Ce nuclei have been investigated. The levels in 147Ce have been extended. A collective band in 145Ce have been identified for the first time. The results from the particle rotor model calculations indicate that the yrast bands in 145Ce and 147Ce originate from vi13/2 orbital coupling and the ground states of 145Ce and 147Ce originate from (vh,9/2,vf7/2, ) and vh9/2 configiration, respectively. No obvious octupole deformation was observed in these two isotopes, but a side band obtained in 147Ce may show some octupole correlations.
出处
《高能物理与核物理》
CSCD
北大核心
2000年第11期1018-1023,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金!(19775026)
核工业科学基金!(Y7197AY509)
美国能源部!(DE-FG05-88ER404
关键词
核结构
集体带结构
丰中子奇A核
铈
nuclear structure, collective band, spontaneous fissio€
