Calculation of microscopic nuclear level densities based on covariant density functional theory  

作　　者：Kun-Peng Geng Peng-Xiang Du Jian Li Dong-Liang Fang 

机构地区：[1]College of Physics,Jilin University,Changchun 130012,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Nuclear Science and Techniques》2023年第9期118-127,共10页核技术（英文）

基　　金：supported by the Natural Science Foundation of Jilin Province(No.20220101017JC);National Natural Science Foundation of China(No.11675063);Key Laboratory of Nuclear Data Foundation(JCKY2020201C157).

摘　　要：In this study,a microscopic method for calculating the nuclear level density(NLD)based on the covariant density functional theory(CDFT)is developed.The particle-hole state density is calculated by a combinatorial method using single-particle level schemes obtained from the CDFT,and the level densities are then obtained by considering collective effects such as vibration and rotation.Our results are compared with those of other NLD models,including phenomenological,microstatisti-cal and nonrelativistic Hartree–Fock–Bogoliubov combinatorial models.This comparison suggests that the general trends among these models are essentially the same,except for some deviations among the different NLD models.In addition,the NLDs obtained using the CDFT combinatorial method with normalization are compared with experimental data,including the observed cumulative number of levels at low excitation energies and the measured NLDs.The CDFT combinatorial method yields results that are in reasonable agreement with the existing experimental data.

关 键 词：Nuclear level density Covariant density functional theory Combinatorial method 

分 类 号：TL329[核科学技术—核技术及应用]