<sup>80</sup>Ge(d,p) measurements at FRIB to inform (n,γ) reaction rates in weak r-process nucleosynthesis

ORAL

Abstract



Individual (n,γ) rates become important in freeze out from the weak r-process near Z=26-34 and N=50. Sensitivity studies[1] have indicated a handful of specific isotopes' (n,γ) rates exhibit notable impacts on final r-process abundance patterns. 80Ge has an enhanced sensitivity and an experiment was designed to utilize FRIB. The 80Ge(d,p) reaction was measured at FRIB using GODDESS and the S800 at 45MeV/u. This measurement aims to constrain spectroscopic factors for bound states including low-lying ½+-5/2+ doublet, in combination with a previous measurement[2] at ~4MeV/u, from which DSD neutron capture cross sections will be determined. Additionally, the experiment will inform the compound nucleus (n,γ) cross sections via the Surrogate Reaction Method. Preliminary results will be discussed. This work is supported in part by the National Science Foundation and the Department of Energy.

1. R. Surman, et al., AIP Advances 4, 041008 (2014).

2. S. Ahn et al., Phys. Rev. C 100, 044613 (2019).

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Presenters

  • Mara M Grinder

    • Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA
    • Rutgers University

Authors

  • Mara M Grinder

    • Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA
    • Rutgers University

  • Sudarsan Balakrishnan

    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA

  • Jolie Antonia Cizewski

    • Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA

  • Kelly A. Chipps

    • Oak Ridge National Laboratory, Oak Ridge, TN, USA / Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA
    • Oak Ridge National Laboratory / University of Tennessee-Knoxville
    • Oak Ridge National Laboratory

  • Steven D Pain

    • Oak Ridge National Laboratory, Oak Ridge, TN, USA / Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA
    • Oak Ridge National Laboratory, University of Tennessee
    • Oak Ridge National Laboratory / University of Tennessee-Knoxville

  • Andrew Ratkiewicz

    • Lawrence Livermore National Laboratory, Livermore, CA, USA
    • Lawrence Livermore National Laboratory

  • Timothy Gray

    • Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA/Oak Ridge National Laboratory, Oak Ridge, TN, USA

  • Kate L Jones

    • Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA
    • University of Tennessee, Knoxville

  • Alan B McIntosh

    • Cyclotron Institution, Texas A&M
    • Texas A&M University
    • Cyclotron Institute, Texas A&M University, College Station, Texas, USA
    • Cyclotron Institution
    • Texas A&M University Cyclotron Institute