Ground-state inversion: The monopole-force governance in neutron mid-shell region

Han-Kui Wang; H. Yang; M.L. Liu; Y.B. Wang; B. Jiang; Y.B. Qian

Physics Letters B (Feb 2024)

Ground-state inversion: The monopole-force governance in neutron mid-shell region

Han-Kui Wang,
H. Yang,
M.L. Liu,
Y.B. Wang,
B. Jiang,
Y.B. Qian

Affiliations

Han-Kui Wang: Department of Physics, Zhejiang SCI-TECH University, Hangzhou 310018, China; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding author at: Department of Physics, Zhejiang SCI-TECH University, Hangzhou 310018, China.
H. Yang: Department of Physics, Zhejiang SCI-TECH University, Hangzhou 310018, China
M.L. Liu: Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Y.B. Wang: China Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, China
B. Jiang: School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
Y.B. Qian: Department of Applied Physics and MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding author.

Journal volume & issue: Vol. 849
p. 138449

Abstract

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This study analyzes the evolution of single-proton states within the odd-A isotopes of 117−133Sb. We identified the monopole force interaction between the πg7/2 and νh11/2 orbitals as the key driver of the ground-state inversion observed in 121Sb. Moreover, we provide an additional asset for this monopole force by investigating the negative-parity states in 132Sb and demonstrating its manifestation through a comparative assessment of πg-νh multiplets. Our results provide conclusive evidence, for the first time, explaining the ground-state inversion in 121Sb through observations in 132Sb. The increasing occupation and configurations of the orbit πd5/2 revealed that the single-proton property of state 5/2+ remained robust even in the neutron mid-shell region.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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