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.

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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