Near-Yrast Structures in Odd-Odd 122I Nucleus  

作　　者：LIU Gong-Ye LI Li LI Xian-Feng YU De-Yang SUN Ji LI Cong-Bo MA Ying-Jun WU Xiao-Guang HE Chuang-Ye ZHENG Yun ZHU Li-Hua ZHAO Yan-Xin 刘弓冶;李黎;李险峰;于德洋;孙吉;李聪博;马英君;吴晓光;贺创业;郑云;竺礼华;赵延新(College of Physics,Jilin University,Changchun 130012;China Institute of Atomic Energy,Beijing 102413;School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191;Department of Physics,Heilongjiang University,Haerbin 150080)

机构地区：[1]College of Physics,Jilin University,Changchun 130012 [2]China Institute of Atomic Energy,Beijing 102413 [3]School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191 [4]Department of Physics,Heilongjiang University,Haerbin 150080

出　　处：《Chinese Physics Letters》2012年第9期40-44,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(10675053);the National Basic Research Programme of China(2007CB815005);RFDP(20060183048)。

摘　　要：Excited states of the odd-odd nucleus 122I are investigated via the fusion-evaporation reaction 116Cd(11B,5n)at a beam energy of 68 MeV.The two most strongly populated bands in 122I are observed up to excitation energies around 10.5 MeV.Their possible configurations at lower spins are assigned toπh_(11/2)■νh_(11/2) andπh_(11/2)■νd_(5/2) based on the observed population,B(M1)/B(E2)values,alignments and signature splitting.E1 transitions are observed connecting theπh_(11/2)■νd_(5/2) band to theπh_(11/2)■νh_(11/2) band,which may be evidence of octupole collectivity.Band terminations caused by the full alignment of the valence nucleons outside the 114Sn core are observed in both bands.

关 键 词：BANDS ALIGNMENT connecting 

分 类 号：O57[理学—粒子物理与原子核物理]