Shape coexistence in 76Se within the neutron–proton interacting boson model  

作　　者：Cheng-Fu Mu Da-Li Zhang 穆成富;张大立(Department of physics,Huzhou University,Huzhou 313000,Zhejiang,China)

机构地区：[1]Department of physics,Huzhou University,Huzhou 313000,Zhejiang,China

出　　处：《Communications in Theoretical Physics》2022年第2期83-89,共7页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.12047568 and 11147148;the Natural Science Foundation of Zhejiang Province under Grant No.LY19A050002。

摘　　要：We have investigated the low-lying energy spectrum and electromagnetic transition strengths in even-even ^(76)Se using the proton-neutron interacting boson model(IBM-2).The theoretical calculation for the energy levels and E2 and M1 transition strengths is in good agreement with the experimental data.Specifically,the excitation energy and E2 transition of 0_(2)^(+) state,which is intimately associated with shape coexistence,can be accurately reproduced.The analysis on lowlying states and the key structure indicators R_(1),R_(2),R_(3) and R_(4) and M1 transitions indicates that there is a coexistence between spherical shape and γ-soft shape in ^(76)Se.

关 键 词：shape coexistence ^(76)Se E2 and M1 transitions IBM-2 

分 类 号：O571[理学—粒子物理与原子核物理]