Effect of pairing correlation on low-lying quadrupole states in Sn isotopes

作     者：孙帅 张时声 张振华 曹李刚 Shuai Sun;Shi-Sheng Zhang;Zhen-Hua Zhang;Li-Gang Cao

作者机构：School of Mathematics and PhysicsNorth China Electric Power UniversityBeijing 102206China School of PhysicsBeihang UniversityBeijing 100191China Key Laboratory of Beam Technology of Ministry of EducationCollege of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation CenterBeijing 100875China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第9期

页      面：136-142页

核心收录：

学科分类：0709[理学-地质学] 08[工学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China(11975096,11875027,11775014) the Fundamental Research Funds for the Central Universities(2020NTST06)。 

主　　题：density-dependence of pairing interaction low-lying quadrupole state Skyrme energy density functional 

摘      要：We examined the low-lying quadrupole states in Sn isotopes in the framework of fully self-consistent Hartree-Fock+BCS plus QRPA.We focus on the effect of the density-dependence of pairing interaction on the properties of the low-lying quadrupole state.The SLy5 Skyrme interaction with surface,mixed,and volume pairings is employed in the calculations,respectively.We find that the excitation energies and the corresponding reduced electric transition probabilities of the first 2^(+) state are different,given by the three pairing interactions.The properties of the quasiparticle state,two-quasiparticle excitation energy,reduced transition amplitude,and transition densities in ^(112)Sn are analyzed in detail.Two different mechanisms,the static and dynamical effects,of the pairing correlation are also discussed.The results show that the surface,mixed,and volume pairings indeed affect the properties of the first 2^(+) state in the Sn isotopes.