Searching for high-K isomers in the proton-rich A～80 mass region  

作　　者：柏志军 焦长峰 高原 许甫荣 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University [2]Department of Physics and Astronomy, University of North Carolina

出　　处：《Chinese Physics C》2016年第9期47-51,共5页中国物理C（英文版）

基　　金：Supported by National Key Basic Research Program of China(2013CB834402);National Natural Science Foundation of China(11235001,11320101004 and 11575007)

摘　　要：Configuration-constrained potential-energy-surface calculations have been performed to investigate the K isomerism in the proton-rich A～ 80 mass region. An abundance of high-K states are predicted. These high-K states arise from two and four-quasi-particle excitations, with K^π= 8^＋ and K^π= 16^＋, respectively. Their excitation energies are comparatively low, making them good candidates for long-lived isomers. Since most nuclei under study are prolate spheroids in their ground states, the oblate shapes of the predicted high-K states may indicate a combination of K isomerism and shape isomerism.Configuration-constrained potential-energy-surface calculations have been performed to investigate the K isomerism in the proton-rich A～ 80 mass region. An abundance of high-K states are predicted. These high-K states arise from two and four-quasi-particle excitations, with K^π= 8^＋ and K^π= 16^＋, respectively. Their excitation energies are comparatively low, making them good candidates for long-lived isomers. Since most nuclei under study are prolate spheroids in their ground states, the oblate shapes of the predicted high-K states may indicate a combination of K isomerism and shape isomerism.

关 键 词：ISOMER HIGH-K proton-rich quasi-particle excitation potential-energy surface 

分 类 号：O571.2[理学—粒子物理与原子核物理]