Work

Symmetry restoration in the axially deformed proton-neutron quasiparticle random-phase approximation for nuclear β decay: The effect of angular-momentum projection

Year: 2026

Type: article

Abstract: We examine the effects of symmetry restoration on nuclear beta decay within the axially deformed proton-neutron quasiparticle random phase approximation (QRPA). We employ the proton-neutron finite-amplitude method (pnFAM) to compute transition amplitudes, and perform angular-momentum projection both after variation and after the QRPA to restore rotational symmetry. Exact projection reduces the calculated beta decay half-lives from those that use the needle approximation by up to 60%, and even more when taking the effects of projection on the ground-state energy into account.

Source: Physical Review C

DOI: 10.1103/lk7x-bqdf

Authors: R. N. Chen, Y. N. Zhang, J. M. Yao, J. Engel

Institution: Sun Yat-sen University

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province, Nuclear Physics