Gamma-Ray Output Spectra from $^{239}$Pu Fission

ORAL

Abstract

A new measurement of the gamma-ray energy spectrum and multiplicity following neutron-induced fission of $^{239}$Pu has been made using DANCE, a highly-segmented, nearly 4$\pi $ BaF$_{2}$ array at the Los Alamos Neutron Science Center. The $^{239}$Pu target consisted of an approximately 2 mg/cm$^{2}$ deposit mounted in a small parallel-plate avalanche chamber inserted into the DANCE in order to tag fission events. The gamma-ray spectra were measured for several strong neutron resonances below 100 eV. The measured spectra were corrected for detector response by using simple parameterizations of the actual fission gamma-ray emission coupled with a GEANT model of the DANCE array.

*This research was supported by funding from the American Recovery and Reinvestment Act of 2009.

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Authors

  • John Ullmann

    • Los Alamos National Laboratory
    • LANL

  • Marian Jandel

    • Los Alamos National Laboratory
    • LANL

  • Todd Bredeweg

    • Los Alamos National Laboratory
    • LANL

  • Aaron Couture

    • Los Alamos National Laboratory
    • LANL

  • Robert Haight

    • Los Alamos National Laboratory

  • John O'Donnell

    • Los Alamos National Laboratory
    • LANL

  • David Vieira

    • Los Alamos National Laboratory

  • C.Y. Wu

    • Lawrence Livermore National Laboratory
    • LLNL

  • Andrii Chyzh

    • Lawrence Livermore National Laboratory
    • LLNL

  • Julie Gostic

    • Lawrence Livermore National Laboratory
    • LLNL

  • Roger Henderson

    • Lawrence Livermore National Laboratory

  • Elaine Kwan

    • Lawrence Livermore National Laboratory