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

作　　者：Shuai Sun Shi-Sheng Zhang Zhen-Hua Zhang Li-Gang Cao 孙帅;张时声;张振华;曹李刚(School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China;School of Physics,Beihang University,Beijing 100191,China;Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China;Beijing Radiation Center,Beijing 100875,China)

机构地区：[1]School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China [2]School of Physics,Beihang University,Beijing 100191,China [3]Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China [4]Beijing Radiation Center,Beijing 100875,China

出　　处：《Chinese Physics C》2021年第9期136-142,共7页中国物理C（英文版）

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

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.

关 键 词：DENSITY-DEPENDENCE of PAIRING interaction LOW-LYING QUADRUPOLE state SKYRME energy density functional 

分 类 号：O571[理学—粒子物理与原子核物理]