STP1228: Measurements of the 237Np(n,f) Cross Section

    Carlson, AD
    staff physicist, National Institute of Standards and Technology, Gaithersburg, MD

    Parker, WE
    Post Doctoral appointee, Lawrence Livermore National Laboratory, CA

    Lisowski, PW
    Staff physicists, Los Alamos National Laboratory, Los Alamos, NM

    Morgan, GL
    Staff physicists, Los Alamos National Laboratory, Los Alamos, NM

    Seestrom, SJ
    Staff physicists, Los Alamos National Laboratory, Los Alamos, NM

    Hill, NW
    Retiree, Oak Ridge National Laboratory, Oak Ridge, TN

    Meggers, K
    Graduate student, University of Kiel, Geesthacht,

    Pages: 7    Published: Jan 1994


    Abstract

    Measurements have been made of the neutron induced fission cross section of 237Np(n,f) at the Los Alamos Neutron Scattering Center utilizing a white neutron source and a fast parallel multiplate ionization chamber. The 10B(n,α) standard cross section was used to establish the energy dependence of the neutron fluence and a very accurately known fission resonance integral for 235U was used for normalization. The measurements in the resonance region, from 5 eV to 5 keV, indicate that the ENDF/B-VI values are too low by about a factor of three.

    Keywords:

    dosimetry, ENDF/B-VI, fission, LANSCE, 237, Np(n,f), neutron, resonance


    Paper ID: STP15166S

    Committee/Subcommittee: E10.01

    DOI: 10.1520/STP15166S


    CrossRef ASTM International is a member of CrossRef.