Abstract
New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of for were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below in the isotones. The erosion of the subshell closure in Si is experimentally confirmed at , and a reduction in the half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.
- Received 19 July 2022
- Accepted 14 September 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.212501
© 2022 American Physical Society
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