STP1550

    Fitting Method for Spectrum Deduction in High-Energy Neutron Field Induced by GeV-Protons Using Experimental Reaction-Rate Data

    Published: Aug 2012


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    Abstract

    The Japanese and American Study of Muon Interaction and Neutron detection (JASMIN) collaboration, has been conducting shielding experiments using the Fermilab anti-proton target station (Pbar) shielding assembly. A multi-foil technique was used to measure the high energy neutron spectra, in the range of 1 to 100 MeV, for the target station shielding configuration. The neutron spectra were de-convoluted using a new fitting method. This method is based on the assumption that a neutron spectrum can be expressed as a simple sum of two exponentials. The validity of the fitting method was confirmed by comparison with the results obtained using SAND-II computer code and theoretical calculations. Finally, it was found that there are simple correlations between reaction rates and the adjustable parameters in the fitting function.

    Keywords:

    high-energy neutron spectrum, GeV-protons, activation method, unfolding, PHITS


    Author Information:

    Kasugai, Y.
    Japan Atomic Energy Agency, Ibaraki-ken,

    Matsuda, N.
    Japan Atomic Energy Agency, Ibaraki-ken,

    Sakamoto, Y.
    Japan Atomic Energy Agency, Ibaraki-ken,

    Nakashima, H.
    Japan Atomic Energy Agency, Ibaraki-ken,

    Yashima, H.
    Research Reactor Institute, Kyoto Univ., Osaka,

    Matsumura, H.
    High Energy Accelerator Organization, Ibaraki,

    Iwase, H.
    High Energy Accelerator Organization, Ibaraki,

    Hirayama, H.
    High Energy Accelerator Organization, Ibaraki,

    Mokhov, N.
    Fermi National Accelerator Laboratory, Batavia, IL

    Leveling, A.
    Fermi National Accelerator Laboratory, Batavia, IL

    Boehnlein, D.
    Fermi National Accelerator Laboratory, Batavia, IL

    Vaziri, K.
    Fermi National Accelerator Laboratory, Batavia, IL

    Lauten, G.
    Fermi National Accelerator Laboratory, Batavia, IL

    Oishi, K.
    Shimizu Corporation, Tokyo,

    Nakamura, T.
    Tohoku Univ., Miyagi,


    Paper ID: STP155020120051

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP155020120051


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