Determining the <sup>95</sup>Zr(n, γ) and <sup>93</sup>Zr(n, γ) cross sections via <sup>96</sup>Zr(p, p’) and <sup>94</sup>Zr(p, p’)<sup> </sup>surrogate reactions

ORAL

Abstract

The surrogate-reaction method was used to obtain the (n, γ) cross section for the short-lived s-process branching point 95Zr, which constrains crucial parameters in stellar-nucleosynthesis models. Inelastic proton scattering from the stable isotope 96Zr served as the surrogate. The measurement was carried out at the Texas A&M University K150 Cyclotron. An enriched 96Zr foil was bombarded with 21-MeV protons. Scattered protons and coincident γ rays were measured with the LLNL Hyperion array, which consists of three segmented annular silicon detectors in a dE-E1-E2 configuration surrounded by an array of BGO Compton-suppressed HPGe Clover detectors. A benchmark was also performed using 94Zr(p, p’) to determine the 93Zr(n, γ) cross section, which has been previously measured via direct methods. Results of the experiment will be discussed.

*Prepared by LLNL under Contract DE-AC52-07NA27344 and LDRD 20-ERD-030.

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Presenters

  • Barbara S Wang

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

Authors

  • Barbara S Wang

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Craig S Reingold

    • Lawrence Livermore Natl Lab
    • University of Notre Dame

  • Jason T Harke

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Richard O Hughes

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Jutta E Escher

    • Lawrence Livermore Natl Lab

  • Sean P Burcher

    • Lawrence Livermore Natl Lab

  • Emanuel V Chimanski

    • Lawrence Livermore Natl Lab

  • Jes Koros

    • University of Notre Dame

  • Brenden R Longfellow

    • Lawrence Livermore Natl Lab
    • NSCL Michigan State University
    • Lawrence Livermore National Laboratory

  • Wei Jia Ong

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory
    • Lawerence Livermore National Laboratory

  • Michael R Savina

    • Lawrence Livermore Natl Lab

  • Danielle Z Shulaker

    • Lawrence Livermore Natl Lab

  • Aaron S Tamashiro

    • Oregon State University

  • Reto Trappitsch

    • EPFL, Lausanne, Switzerland

  • Peter K Weber

    • Lawrence Livermore Natl Lab

  • Brett H Isselhardt

    • Lawrence Livermore Natl Lab