Journal
PHYSICAL REVIEW C
Volume 101, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.101.025803
Keywords
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Categories
Funding
- NSERC
- U.S.A. NSF [PHY-1419765, PHY-1614130]
- DOE [DE-SC0017649]
- Brazil's CNPq [249121/2013-1]
- United Kingdom's STFC [ST/L005816/1, ST/L005743/1]
- Canada-UK Foundation
- DFG [FR 601/3-1, SFB 1245]
- DFG (PRISMA Cluster of Excellence)
- BMBF [05P15RGFN1, 05P12RGFN8]
- Helmholtz Association through NAVI [VH-VI-417]
- HMWK through the LOEWE Center HICforFAIR
- JLU
- GSI
- ChETEC COST Action [CA16117]
- COST (European Cooperation in Science and Technology)
- Los Alamos National Laboratory
- National Nuclear Security Administration of US Department of Energy [DEAC52-06NA25396]
- NRC-CNRC
- CFI
- U.S. Department of Energy (DOE) [DE-SC0017649] Funding Source: U.S. Department of Energy (DOE)
- STFC [ST/L005743/1, ST/L005816/1] Funding Source: UKRI
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We report mass measurements of neutron-rich Ga isotopes Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga-84 and Ga-85 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 A approximate to 84 isotopes by the r-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 Y-e = 0.35-0.38.
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