中国物理B ›› 2026, Vol. 35 ›› Issue (2): 20603-020603.doi: 10.1088/1674-1056/ae13ee

• • 上一篇    下一篇

Octupole correlations of the Kπ=5/2+ ground-state band in 229Th

Yuan-Yuan Wang(王媛媛) and Peng-Wei Zhao(赵鹏巍)   

  1. 1 Mathematics and Physics Department, North China Electric Power University, Beijing 102206, China;
    2 State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2025-08-13 修回日期:2025-10-03 接受日期:2025-10-16 发布日期:2026-02-05
  • 通讯作者: Peng-Wei Zhao E-mail:pwzhao@pku.edu.cn
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (Grant Nos. 12205097, 12141501, 12475117, and 12435006), the National Key Laboratory of Neutron Science and Technology (Grant No. NST202401016), the National Key R&D Program of China (Grant Nos. 2024YFA1612600 and 2024YFE0109803), and the High-performance Computing Platform of Peking University.

Octupole correlations of the Kπ=5/2+ ground-state band in 229Th

Yuan-Yuan Wang(王媛媛) and Peng-Wei Zhao(赵鹏巍)   

  1. 1 Mathematics and Physics Department, North China Electric Power University, Beijing 102206, China;
    2 State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
  • Received:2025-08-13 Revised:2025-10-03 Accepted:2025-10-16 Published:2026-02-05
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (Grant Nos. 12205097, 12141501, 12475117, and 12435006), the National Key Laboratory of Neutron Science and Technology (Grant No. NST202401016), the National Key R&D Program of China (Grant Nos. 2024YFA1612600 and 2024YFE0109803), and the High-performance Computing Platform of Peking University.

PDF (PC)

0

赞

摘要： The octupole correlations of the $K^\pi=5/2^+$ ground state and the rotational spectrum built on it in $^{229}$Th are studied using the microscopic relativistic density functional theory on a three-dimensional lattice space and the reflection-asymmetric triaxial particle rotor model. It is found that $^{229}$Th has a ground state with static axial octupole and quadrupole deformations. The occurrence of octupole correlations, driven by the octupole deformation, is analyzed through the evolution of single-particle levels around the Fermi surface. The experimental energy spectrum and the electromagnetic transition probabilities, including $B(E2)$ and $B(M1)$, are reasonably well reproduced.

关键词: octupole correlation, relativistic density functional theory, reflection-asymmetric triaxial particle rotor model, rotational spectrum

Abstract: The octupole correlations of the $K^\pi=5/2^+$ ground state and the rotational spectrum built on it in $^{229}$Th are studied using the microscopic relativistic density functional theory on a three-dimensional lattice space and the reflection-asymmetric triaxial particle rotor model. It is found that $^{229}$Th has a ground state with static axial octupole and quadrupole deformations. The occurrence of octupole correlations, driven by the octupole deformation, is analyzed through the evolution of single-particle levels around the Fermi surface. The experimental energy spectrum and the electromagnetic transition probabilities, including $B(E2)$ and $B(M1)$, are reasonably well reproduced.

Key words: octupole correlation, relativistic density functional theory, reflection-asymmetric triaxial particle rotor model, rotational spectrum

中图分类号:  (Time and frequency)

  • 06.30.Ft
21.10.-k (Properties of nuclei; nuclear energy levels) 21.60.-n (Nuclear structure models and methods) 21.60.Jz (Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations)) 23.20.-g (Electromagnetic transitions)