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    STP1398

    Fission Cross Section Measurements of Th-229 and Pa-231 Using Linac-Driven Lead Slowing-Down Spectrometer

    Published: 0


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    Abstract

    Making use of a back-to-back type double fission chamber and Kyoto University Lead slowing-down Spectrometer (KULS) driven by a 46 MeV electron linear accelerator (linac) at the Research Reactor Institute, Kyoto University (KURRI), the neutron-induced fission cross sections of Th-229 and Pa-231 have been measured relative to the 235U(n,f) reaction from ∼0.1 eV to 10 keV with energy resolution (FWHM) of about 40%. Each of the measured results has been compared with the evaluated data in ENDF/B-VI, JENDL-3.2 and JEF-2.2, whose data were broadened by the energy resolution of the KULS. The experimental data for the fission cross sections of Th-229 and Pa-231 have scarcely been obtained before in the relevant energy region.

    Keywords:

    fission cross section, measurement, Th-229, Pa-231, lead slowing-down spectrometer, back-to-back type double fission chamber, 0.1 eV to 10 keV energy range, JENDL-3.2, ENDF/B-VI, JEF-2.2


    Author Information:

    Kobayashi, K
    Research Reactor Institute, Kyoto University, Osaka,

    Yamamoto, S
    Research Reactor Institute, Kyoto University, Osaka,

    Kai, T
    Japan Atomic Energy Research Institute, Ibaraki,

    Cho, HJ
    Research Reactor Institute, Kyoto University, Osaka,

    Visiting scientist, University of Ulsan,

    Yamana, H
    Research Reactor Institute, Kyoto University, Osaka,

    Fujita, Y
    Research Reactor Institute, Kyoto University, Osaka,

    Mitsugashira, T
    The Oarai-branch, Institute for Material Research, Tohoku University, Ibaraki,

    Kimura, I
    Institute of Nuclear Technology, Institute of Nuclear Safety System, Inc., Fukui,


    Committee/Subcommittee: E10.14

    DOI: 10.1520/STP13627S