2018/10/16 by R. Dunlop, Dunlop, R., C. E. Svensson +83
Physics and Astronomy · #Astro and Planetary Science #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Nuclear physics research studies
paper · pdf · doi:10.48550/arxiv.1810.07089
openalex publication_date 2018/10/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The half-lives of isotopes around the N=82 shell closure are an important ingredient in astrophysical simulations and strongly influence the magnitude of the second r-process abundance peak in the A∼130 region. The most neutron-rich N=82 nuclei are not accessible to the current generation of radioactive beam facilities and r-process simulations must therefore rely on calculations of the half-lives of the isotopes involved. Half-life measurements of the experimentally accessible nuclei in this region are important in order to benchmark these calculations. The half-life of 130Cd is particularly important as it is used to tune the Gamow-Teller quenching in shell-model calculations for the β decay of other nuclei in this region. In this work, the GRIFFIN γ-ray spectrometer at the TRIUMF-ISAC facility was used to measure the half-life of 130~48Cd82 to be T1/2= 126(4) ms. In addition, the half-lives of the three β decaying states of 131~49In82 were measured to be T1/2(1/2-)=328(15) ms, T1/2(9/2+)=265(8) ms, and T1/2(21/2+)=323(50) ms, respectively, providing an important benchmark for half-life calculations in this region.