Symmetry restoration in the axially deformed proton-neutron quasiparticle random-phase approximation for nuclear β decay: The effect of angular-momentum projection
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.
Fields of Study & Subjects
Nuclear physics research studies
Atomic and Subatomic Physics Research
Quantum chaos and dynamical systems
Publication details
- Journal / source
- Physical Review C
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 3
- Publication date
- 17 February 2026
- Language
- EN