Journal article

Publication year: 2020

Journal: Physical Review C

Volume number: 101

Issue number: 2

ISSN: 2469-9985

eISSN: 2469-9993

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevC.101.025803

Publisher: American Physical Society

Abstract: 
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.

Harvard Citation style: Reiter, M., San Andres, S., Nikas, S., Lippuner, J., Andreoiu, C., Babcock, C., et al. (2020) Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations, Physical Review C, 101(2), Article 025803. https://doi.org/10.1103/PhysRevC.101.025803

APA Citation style: Reiter, M., San Andres, S., Nikas, S., Lippuner, J., Andreoiu, C., Babcock, C., Barquest, B., Bollig, J., Brunner, T., Dickel, T., Dilling, J., Dillmann, I., Dunling, E., Gwinner, G., Graham, L., Hornung, C., Klawitter, R., Kootte, B., Kwiatkowski, A., ...Welch, D. (2020). Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations. Physical Review C. 101(2), Article 025803. https://doi.org/10.1103/PhysRevC.101.025803