Abstract
We report mass measurements of neutron-rich Ga isotopes with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of in good agreement with previous measurements. The masses of and were measured for the first time. Uncertainties between 25 and 48 keV were reached. The new mass values reduce the nuclear uncertainties associated with the production of isotopes by the -process for astrophysical conditions that might be consistent with a binary neutron star (BNS) merger producing a blue kilonova. Our nucleosynthesis simulations confirm that BNS merger may contribute to the first abundance peak under moderate neutron-rich conditions with electron fractions .
- Received 26 October 2018
- Revised 25 November 2019
- Accepted 24 January 2020
DOI:https://doi.org/10.1103/PhysRevC.101.025803
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