2024/12/05 by M. Madurga, Xu Zhang, Madurga, M. +98
Physics and Astronomy · #Astro and Planetary Science #FOS: Physical sciences #Gamma-ray bursts and supernovae #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · doi:10.48550/arxiv.2412.04333
openalex publication_date 2024/12/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Using the time-of-flight technique, we measured the beta-delayed neutron emission of 132Cd. From our large-scale shell model (LSSM) calculation using the N3LO interaction [Z. Y. Xu et al., Phys. Rev. Lett. 131, 022501 (2023)PRLTAO0031-900710.1103/PhysRevLett.131.022501], we suggest the decay is dominated by the transformation of a neutron in the g7/2 orbital, deep below the Fermi surface, into a proton in the g9/2 orbital. We compare the beta-decay half-lives and neutron branching ratios of nuclei with Z<50 and N≥82 obtained with our LSSM with those of leading "global" models such as finite-range droplet model (FRDM). Our calculations match known half-lives and neutron branching ratios well and suggest that current leading models overestimate the yet-to-be-measured half-lives. Our model, backed by the 132Cd decay data presented here, offers robust predictive power for nuclei of astrophysical interest such as r-process waiting points.