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

Kun-Peng Geng; Peng-Xiang Du; Jian Li; Dong-Liang Fang

doi:10.1007/s41365-023-01298-w

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

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2023-10-13

- Calculation of microscopic nuclear level densities based on covariant density functional theory
- Calculation of microscopic nuclear level densities based on covariant density functional theory
- 核技术（英文版） 2023年34卷第9期文章编号：141
- Affiliations：
  
  1.College of Physics, Jilin University, Changchun 130012, China
  2.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Author bio：
  
  † jianli@jlu.edu.cn
  ‡ dlfang@impcas.ac.cn
- Funds：
  
  Natural Science Foundation of Jilin Province(20220101017JC);National Natural Science Foundation of China(11675063);Key Laboratory of Nuclear Data foundation(JCKY2020201C157)
- DOI：10.1007/s41365-023-01298-w
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Calculation of microscopic nuclear level densities based on covariant density functional theory[J]. 核技术（英文版）, 2023,34(9):141

Kun-Peng Geng, Peng-Xiang Du, Jian Li, et al. Calculation of microscopic nuclear level densities based on covariant density functional theory[J]. Nuclear Science and Techniques, 2023,34(9):141
Calculation of microscopic nuclear level densities based on covariant density functional theory[J]. 核技术（英文版）, 2023,34(9):141 DOI： 10.1007/s41365-023-01298-w.

Kun-Peng Geng, Peng-Xiang Du, Jian Li, et al. Calculation of microscopic nuclear level densities based on covariant density functional theory[J]. Nuclear Science and Techniques, 2023,34(9):141 DOI： 10.1007/s41365-023-01298-w.

摘要

Abstract

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, microstatistical and non-relativistic 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

Keywords

Nuclear level densityCovariant density functional theoryCombinatorial method

references

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