Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations

  title={Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first 
-process abundance peak in neutron-star merger calculations},
  author={Moritz P. Reiter and S. Ayet San Andr'es and S. Nikas and Jonas Lippuner and C. Andreoiu and Carla Babcock and B. R. Barquest and J. Bollig and T. Brunner and Timo Dickel and Jens Dilling and Iris Dillmann and E. Dunling and Gerald Gwinner and Leigh Graham and Christine Hornung and Ralph A. Klawitter and Brian Kootte and Anna A. Kwiatkowski and Yang Lan and Daniel Lascar and Kyle G. Leach and E. Leistenschneider and Gabriel Mart'inez-Pinedo and J. E. McKay and S. F. Paul and Wolfgang R. Pla{\ss} and L. E. Roberts and H. Schatz and Christoph Scheidenberger and Andre Sieverding and Ren'e Steinbrugge and R. I. Thompson and Michael E. Wieser and C Will and D. L. Welch},
  journal={Physical Review C},
We report mass measurements of neutron-rich Ga isotopes in the A $\approx$ 84 region crossing the N=50 neutron shell closure with TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The measurements, employing a multiple-reflection time-of-flight mass spectrometer, determine the masses of $^{80-85}$Ga with uncertainties between $25-48$~keV; the masses of $^{84}$Ga and $^{85}$Ga were measured for the first time. The new mass values reduce the nuclear uncertainties associated with the… 
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