Neutron Capture Cross Section of $^{239}$Pu

ORAL

Abstract

The $^{239}$Pu(n,$\gamma$) cross section has been measured at the Los Alamos Neutron Science Center (LANSCE). The Detector for Advanced Neutron Capture Experiments (DANCE) provided a highly segmented 4$\pi$ measurement of the energy and multiplicity distributions for emitted $\gamma$-rays, while a PPAC detected coincidence fission fragments. The simultaneous measurement of (n,$\gamma$) and (n,f) events resulting from a single sample allowed the (n,$\gamma$) cross section to be measured as a ratio to fission with reduced systematic uncertainty. Results from the current analysis will be presented.

*This work performed under the auspices of the US Department of Energy by Los Alamos National Security LLC under contract DE-AC52-06NA25396 and by Lawrence Livermore National Security, LLC under contract DE-AC52-07NA27344

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Authors

  • S. Mosby

    • Los Alamos National Laboratory
    • LANL

  • C. Arnold

    • LANL

  • T.A. Bredeweg

    • LANL

  • A. Chyzh

    • LLNL

  • A. Couture

    • LANL

  • J.M. Gostic

    • LLNL

  • R.A. Henderson

    • LLNL

  • M. Jandel

    • LANL

  • E. Kwan

    • LLNL

  • J.M. O'Donnell

    • LANL

  • G. Rusev

    • LANL

  • J.L. Ullmann

    • LANL

  • C-Y. Wu

    • LLNL