Experimentally constrained $^{92}$Sr($n,\gamma$) reaction rate

ORAL

Abstract

Although fission was discovered 80 years ago, fundamental data for neutron-induced production and destruction of fission products is missing. This data deficiency leads to reaction-rate uncertainties up to several orders of magnitude. An area particularly deficient in neutron-induced cross section data is the A=95 fission fragment region. To address this need, an experiment to indirectly determine the neutron-capture cross section on a short-lived fission fragment, $^{92}$Sr, was recently performed at the NSCL utilizing a total absorption spectrometer to measure the emitted $\gamma$ rays from $^{93}$Sr following the decay of $^{93}$Rb. The $\beta$-Oslo method is used in the ongoing data analysis to extract to extract level density and $\gamma$-decay strength, two key ingredients for calculating ($n,\gamma$) reaction rates. Preliminary analysis of measured $\gamma$-ray spectra will be presented here. The results will also provide crucial tests for model input to infer the ($n,\gamma$)$^{95}$Sr reaction rate, which is a high-yield fission product.

*Work performed by LLNL under Contract DE-AC52-07NA27344, LBNL under Contract No. DE-AC02-05CH11231 and DOE NNSA through the NSSC under Award Number DE-NA0003180.

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Presenters

  • Adriana Ureche

    • Department of Nuclear Engineering, University of California, Berkeley
    • University of California, Berkeley

Authors

  • Adriana Ureche

    • Department of Nuclear Engineering, University of California, Berkeley
    • University of California, Berkeley

  • Darren L Bleuel

    • Lawrence Livermore National Laboratory (LLNL)
    • Lawrence Livermore National Laboratory

  • Nicholas David Scielzo

    • Lawrence Livermore National Laboratory (LLNL)
    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Lee Allen Bernstein

    • Lawrence Berkeley National Laboratory (LBNL)
    • Lawrence Berkeley Natl Lab
    • Lawrence Berkeley National Lab

  • Bethany L. Goldblum

    • Department of Nuclear Engineering, University of California, Berkeley
    • University of California, Berkeley

  • Magne S. Guttormsen

    • Department of Physics, University of Oslo
    • University of Oslo

  • Thibault A. Laplace

    • Department of Nuclear Engineering, University of California, Berkeley
    • University of California, Berkeley

  • Ann-Cecilie Larsen

    • Department of Physics, University of Oslo
    • Univ of Oslo
    • University of Oslo

  • Sean N. N. Liddick

    • National Superconducting Cyclotron Laboratory, Michigan State University
    • National Superconducting Cyclotron Laboratory (NSCL)
    • National Superconducting Cyclotron Laboratory
    • Michigan State Univ

  • Mallory K K Smith

    • National Superconducting Cyclotron Laboratory, Michigan State University
    • Michigan State University
    • Michigan State Univ
    • National Superconducting Cyclotron Laboratory

  • Artemis Spyrou

    • National Superconducting Cyclotron Laboratory, Michigan State University
    • National Superconducting Cyclotron Laboratory (NSCL)
    • Michigan State Univ
    • Michigan State Univ, National Superconducting Cyclotron
    • Michigan State University
    • National Superconducting Cyclotron Laboratory

  • Jasmina Vujic

    • Department of Nuclear Engineering, University of California, Berkeley
    • University of California, Berkeley