^(146)Ce核的八级形变带和准γ带(英文)  

Octupole Deformed Band and Quasi-γBand in ^(146)Ce Nucleus

作　　者：陈永静[1] 朱胜江[1] J. H. Hamilton A. V. Ramayya J. K. Hwang Y. X. Luo J. O. Rasmussen 车兴来[1] 丁怀博[1] 李明亮[1] 

机构地区：[1]清华大学物理系,北京100084 [2]Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 USA [3]Lawrence Berkeley National Laboratory, Berkeley, California 94720 USA

出　　处：《高能物理与核物理》2006年第8期740-744,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10575057,10375032)教育部博士点基金项目(20030003090)资助~~

摘　　要：通过测量252Cf自发裂变所产生的瞬发γ射线,对146Ce核的高自旋结构进行了重新研究,结果更新了以前报道的能级纲图,把八级形变集体带扩展到更高的自旋,并且重新构建了可能的准γ带结构．此外,用反射不对称壳模型(RASM)对146Ce核的八级形变带进行了计算,低自旋处的计算结果与实验数据符合得很好．High-spin structures in ^146Ce nucleus have been re-investigated by measuring the prompt γ rays from spontaneous fission of ^252Cf. The previously reported level scheme of 146Ce has been updated. The octupole deformed collective bands have been extended up to higher spin states, A possible quasi-γ band structure was examined and reconstructed according to our data analysis. In addition, the reflection asymmetric shell model was applied to describe the octupole deformed bands in ^146Ce, and the calculated results are in good agreement with the experimental data at lower spins.

关 键 词：高自旋态 八级形变带 准γ带 壳模型 

分 类 号：O571.2[理学—粒子物理与原子核物理]