Reinvestigation of the high spin states in ^(161)Er and enhanced E1 transitions in the N=93 isotones  

作　　者：陈亮 周小红 张玉虎 柳敏良 王世陶 方永得 滑伟 强赟华 李广顺 周厚兵 丁兵 王海霞 郑勇 竺礼华 吴晓光 

机构地区：[1]Institute of Modern Physics, Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences [3]China Institute of Atomic Energy

出　　处：《Chinese Physics C》2011年第6期545-549,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10825522, 10735010, 10575120);National Basic Research Program of China (2007CB815001);Chinese Academy of Sciences

摘　　要：High-spin states in 161Er have been studied experimentally using the 150Nd（16O, 5n） reaction at a beam energy of 86 MeV. The relatively enhanced E1 transitions between the 5/2＋[642] and 3/2-[521] bands are observed in 161Er, and the B（E1） values are extracted experimentally. The systematics of the R（E1） values in the N = 93 isotones are presented. It is found that the strength of the E1 transitions obviously exhibits angular momentum dependence, and the occurrence of the relatively enhanced E1 transitions could be attributed to octupole softness.High-spin states in 161Er have been studied experimentally using the 150Nd（16O, 5n） reaction at a beam energy of 86 MeV. The relatively enhanced E1 transitions between the 5/2＋[642] and 3/2-[521] bands are observed in 161Er, and the B（E1） values are extracted experimentally. The systematics of the R（E1） values in the N = 93 isotones are presented. It is found that the strength of the E1 transitions obviously exhibits angular momentum dependence, and the occurrence of the relatively enhanced E1 transitions could be attributed to octupole softness.

关 键 词：high-spin state E1 transition angular momentum dependence octupole softness 

分 类 号：O571[理学—粒子物理与原子核物理]