133In: A Rosetta Stone for Decays of r-Process Nuclei

Xu, ZY, Madurga, M, Grzywacz, R, King, TT, Algora, A, Andreyev, AN, Benito, J, Berry, T, Borge, MJG, Costache, C
et al (show 39 more authors) (2023) 133In: A Rosetta Stone for Decays of r-Process Nuclei. Physical Review Letters, 131 (2). 022501-.

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The β decays from both the ground state and a long-lived isomer of ^{133}In were studied at the ISOLDE Decay Station (IDS). With a hybrid detection system sensitive to β, γ, and neutron spectroscopy, the comparative partial half-lives (logft) have been measured for all their dominant β-decay channels for the first time, including a low-energy Gamow-Teller transition and several first-forbidden (FF) transitions. Uniquely for such a heavy neutron-rich nucleus, their β decays selectively populate only a few isolated neutron unbound states in ^{133}Sn. Precise energy and branching-ratio measurements of those resonances allow us to benchmark β-decay theories at an unprecedented level in this region of the nuclear chart. The results show good agreement with the newly developed large-scale shell model (LSSM) calculations. The experimental findings establish an archetype for the β decay of neutron-rich nuclei southeast of ^{132}Sn and will serve as a guide for future theoretical development aiming to describe accurately the key β decays in the rapid-neutron capture (r-) process.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 25 Jul 2023 15:33
Last Modified: 04 Aug 2023 09:25
DOI: 10.1103/physrevlett.131.022501
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3171910