Yrast Band in^(122)I and Band Termination  

作　　者：刘弓冶 李黎 李险峰 马英君 赵延新 杨东 李聪博 马克岩 于德洋 杨彦佶 陆景彬 竺礼华 吴晓光 贺创业 郑云 王烈林 郝昕 李广生 

机构地区：[1]Department of Physics,Jilin University [2]China Institute of Atomic Energy

出　　处：《Plasma Science and Technology》2012年第5期412-414,共3页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos.10675053,10475033);National Basic Research Program of China(No.2007CB815005)

摘　　要：High spin states of the odd-odd nucleus 122^Ⅰ have been investigated via the fusion- evaporation reaction 116^Cd（11^B, 5n） at a beam energy of 68 MeV. The yrast band is extended up to Ⅰ^π= （29＋）. The band termination at Ⅰ^π= （22^＋） reported in previous studies is confirmed and interpreted as arising from a shape change from collective prolate to noncollective oblate according to Total-Routhian-Surface （TRS） calculations. In addition, the Ⅰ^π=（29^＋） state is assigned to the [πh^11/2 （πg7/2）^2]23/2- [（vhll/2）^3 （vd5/2）^2]35/2- configuration corresponding to the full alignment of all valance nucleons outside the semi-closed shell.High spin states of the odd-odd nucleus 122^Ⅰ have been investigated via the fusion- evaporation reaction 116^Cd（11^B, 5n） at a beam energy of 68 MeV. The yrast band is extended up to Ⅰ^π= （29＋）. The band termination at Ⅰ^π= （22^＋） reported in previous studies is confirmed and interpreted as arising from a shape change from collective prolate to noncollective oblate according to Total-Routhian-Surface （TRS） calculations. In addition, the Ⅰ^π=（29^＋） state is assigned to the [πh^11/2 （πg7/2）^2]23/2- [（vhll/2）^3 （vd5/2）^2]35/2- configuration corresponding to the full alignment of all valance nucleons outside the semi-closed shell.

关 键 词：band structure odd-odd nucleus band termination full alignment 

分 类 号：O571[理学—粒子物理与原子核物理]