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

Reiter, M. P., San Andres, S. A., 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): 025803. doi:10.1103/PhysRevC.101.025803.

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 Creators:
Reiter, M. P.1, Author
San Andres, S. Ayet1, Author
Nikas, S.1, Author
Lippuner, J.1, Author
Andreoiu, C.1, Author
Babcock, C.1, Author
Barquest, B. R.1, Author
Bollig, J.1, Author
Brunner, T.1, Author
Dickel, T.1, Author
Dilling, J.1, Author
Dillmann, I1, Author
Dunling, E.1, Author
Gwinner, G.1, Author
Graham, L.1, Author
Hornung, C.1, Author
Klawitter, Renee2, Author              
Kootte, B.1, Author
Kwiatkowski, A. A.1, Author
Lan, Y.1, Author
Lascar, D.1, AuthorLeach, K. G.1, AuthorLeistenschneider, E.1, AuthorMartinez-Pinedo, G.1, AuthorMcKay, J. E.1, AuthorPaul, S. F.1, AuthorPlass, W. R.1, AuthorRoberts, L.1, AuthorSchatz, H.1, AuthorScheidenberger, C.1, AuthorSieverding, A.1, AuthorSteinbrugge, R.1, AuthorThompson, R.1, AuthorWieser, M. E.1, AuthorWill, C.1, AuthorWelch, D.1, Author more..
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1external, ou_persistent22              
2Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              

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 MPINP: Präzisionsexperimente - Abteilung Blaum
 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.

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 Dates: 2020-02
 Publication Status: Published online
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 Identifiers: DOI: 10.1103/PhysRevC.101.025803
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Title: Physical Review C
  Other : Phys. Rev. C
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 101 (2) Sequence Number: 025803 Start / End Page: - Identifier: ISSN: 0556-2813
CoNE: https://pure.mpg.de/cone/journals/resource/954925225009