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
- Nuclear Science and Techniques Vol. 34, Issue 9, Article number: 141(2023)
- 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：
- DOI：10.1007/s41365-023-01298-w
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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 34(9):141(2023)
DOI：

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 34(9):141(2023) 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

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