High-Spin States in ^(141)Pm  

作　　者：朱胜江 顾龙 王建国 肖志刚 杨韵颐 张明 刘宇 丁怀博 竺礼华 吴晓光 贺创业 李广生 王烈林 郑云 张彪 

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

出　　处：《Plasma Science and Technology》2012年第6期496-498,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. 10975082, 10775078);the Major State Basic Research Development Program of China (No. 2007CB815005);the Special Program of Higher Education Science Foundation of China (No. 20070003149)

摘　　要：The high-spin states of 141pro nucleus have been studied by using in-beam v-ray spectroscopy technology through the126Te（19F, 4n） reaction at a beam energy of 90 MeV. The previous level scheme has been extended with spin up to 49/2 h. Many new levels and transitions are identified. Five collective band structures are observed. Based on systematic comparison with the neighboring nuclei, two bands with strong AI = 1 M1 transitions inside the bands are proposed as the oblate bands with γ--60°, and three bands with large signature splitting have been suggested as the oblate-triaxial deformation with γ--90°. The characteristics for these bands have been discussed.The high-spin states of 141pro nucleus have been studied by using in-beam v-ray spectroscopy technology through the126Te（19F, 4n） reaction at a beam energy of 90 MeV. The previous level scheme has been extended with spin up to 49/2 h. Many new levels and transitions are identified. Five collective band structures are observed. Based on systematic comparison with the neighboring nuclei, two bands with strong AI = 1 M1 transitions inside the bands are proposed as the oblate bands with γ--60°, and three bands with large signature splitting have been suggested as the oblate-triaxial deformation with γ--90°. The characteristics for these bands have been discussed.

关 键 词：nuclear structure high spin states oblate band oblate-triaxial band 

分 类 号：O571[理学—粒子物理与原子核物理]