STP1490: Precision Neutron Total Cross-Sectional Measurements for Natural Carbon at Reactor Neutron-Filtered Beams

    Gritzay, O.
    Head of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Kolotyi, V.
    Senior Scientist of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Klimova, N.
    Research Engineer of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Kaltchenko, O.
    Senior Scientist of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Gnidak, M.
    Senior Scientist of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Vorona, P.
    Senior Scientist of Neutron Physics Department, Institute for Nuclear Research, Kyiv,

    Pages: 7    Published: Jan 2007


    Abstract

    An experimental investigation of the total neutron cross section for natural carbon was made at Kyiv Research Reactor using neutron-filtered beams with energies 24, 59, and 148 keV. The intense neutron beams formed by composite neutron filters at reactor horizontal channels )had fluxes of about 106 to 107 neutron/cm2 s at the fixed neutron energies, which enabled us to measure the neutron cross sections with accuracy better than 1 %. Transmission method was used in these measurements. The results of the measurements are presented together with the analysis of the known previous experimental data and the evaluated nuclear data from ENDF libraries. Sample thickness dependence of the observed neutron cross section, measured at the 148-keV filter, has been detected which hypothetically may be connected with existence of a very strong resonance in the 13C neutron cross section in the energy range 119 to 157 keV.

    Keywords:

    carbon, research reactor, neutron filtered beam, total neutron cross section, transmission method


    Paper ID: STP45445S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP45445S


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