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    STP1398

    Actual and Potential Measurements of Fission-Rate Ratios in the NIST Iron Sphere

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    Abstract

    We analyze various calculated fission-rate ratios in the leakage spectrum of the NIST iron sphere benchmark field employing a few modern cross-section libraries and compare the only measured value of the 237Np/238U ratio to the respective calculated values. We also present the sensitivities of the calculated fission rates and fission-rate ratios to the 56Fe elastic- and first-level-inelastic-scattering cross sections. We conclude with a recommendation of additional measurements that can shed more light on the various iron, in particular 56Fe, cross-section evaluations.

    Keywords:

    iron sphere, NIST, reaction rates, sensitivities, cross-section libraries


    Author Information:

    Perel, RL
    Racah Institute of Physics, The Hebrew University, Jerusalem,

    Wagschal, JJ
    Racah Institute of Physics, The Hebrew University, Jerusalem,

    Yeivin, Y
    Racah Institute of Physics, The Hebrew University, Jerusalem,


    Committee/Subcommittee: E10.14

    DOI: 10.1520/STP13615S