Effects of pairing correlation on neutron drop

作     者：Ying-Hui Ge Ying Zhang Jin-Niu Hu Ying-Hui Ge;Ying Zhang;Jin-Niu Hu

作者机构：Department of PhysicsSchool of ScienceTianjin UniversityTianjin 300072China School of PhysicsNankai UniversityTianjin 300071China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2020年第63卷第4期

页      面：88-97页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

基　　金：the National Natural Science Foundation of China(Grant Nos.11405116 and 11775119). 

主　　题：neutron drop Hartree-Fock theory Hartree-Fock-Bogoliubov theory pairing correlation 

摘      要：In this work, the effects of the pairing correlation on the properties of neutron drops N=6-50 trapped in a harmonic oscillator potential with ω = 10 Me V are investigated by comparing the results given by the Skyrme Hartree-Fock and Hartree-FockBogoliubov theories with the density-dependent delta interaction(DDDI) pairing force. The results showed that the pairing correlation slightly made the neutron drops more bound, and increased the central neutron density, the spin-orbit and pseudo spin-orbit splittings. Thus, the pairing correlation must be accounted for to improve the Skyrme functional compared with the ab initio calculations. Furthermore, although the single-particle energy gaps with or without pairing were similar, the shell closures varied due to pair scattering. Here, the shell closures in neutron drops using the Sk M* parameter set and DDDI pairing force were found at N=8, 16, and 32.