Doublet bands in ^(128)La and systematic features of energy separationof doublet bands observed in the A～130 mass region  

作　　者：马克岩 陆景彬 杨东 王辉东 刘运祚 李剑 刘弓冶 李黎 马英君 吴晓光 李广生 郑云 贺创业 

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

出　　处：《Chinese Physics C》2013年第4期39-42,共4页中国物理C（英文版）

基　　金：Supported by National Basic Research Programme of China (2007CB815005);National Natural Science Foundation of China(11075064);Specialized Research Fund for the Doctoral Programme of Higher Education of China (20050183008)

摘　　要：High spin states of 128La have been studied through the fusion-evaporation reaction 118Sn（14N,4n） 128La at a beam energy of 69 MeV. A positive-parity side band with the same configuration as that of the yrast band has been identified. Moreover, it is noted that the energy separation △E（I） = E（I）side-E（I）yrast of all doublet bands reported in odd-odd nuclei in the A～130 mass region exhibit a staggering pattern systematically, and they stagger up at even-spin and stagger down at odd-spin.High spin states of 128La have been studied through the fusion-evaporation reaction 118Sn（14N,4n） 128La at a beam energy of 69 MeV. A positive-parity side band with the same configuration as that of the yrast band has been identified. Moreover, it is noted that the energy separation △E（I） = E（I）side-E（I）yrast of all doublet bands reported in odd-odd nuclei in the A～130 mass region exhibit a staggering pattern systematically, and they stagger up at even-spin and stagger down at odd-spin.

关 键 词：high spin state fusion-evaporation reaction doublet band 

分 类 号：O571[理学—粒子物理与原子核物理] X823[理学—物理]