Analysis of level structure and monopole effects in Ca isotopes  

作　　者：Jin Li Ai-Xi Chen Amir Jalili Han-Kui Wang 

机构地区：[1]School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Nuclear Science and Techniques》2024年第10期161-167,共7页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.12175199,U2267205,12475124);the ZSTU intramural grant(22062267-Y)。

摘　　要：Understanding the properties of nuclei near the double magic nucleus^(40)Ca is crucial for both nuclear theory and experiments.In this study,Ca isotopes were investigated using an extended pairing-plus-quadrupole model with monopole corrections.The negative-parity states of^(44)Ca were coupled with the intruder orbital g_(9/2)at 4 MeV.The values of E_(4+)/E_(2+)agree well with experimental trend from^(42)Ca to^(50)Ca,considering monopole effects between νf_(7/2)and νp_(3/2)(νf_(5/2)).This monopole effect,determined from data of^(48)Ca and^(50)Ca,supports the proposed new nuclear magic number N=34 by predicting a high-energy 2^(+)state in^(54)Ca.

关 键 词：Shell model Doubly magic ISOTOPES Monopole effects Level structure 

分 类 号：TL92[核科学技术—核燃料循环与材料]