SYMPOSIA PAPER Published: 01 August 2012
STP155020120051

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

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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.

Author Information

Kasugai, Y.
Japan Atomic Energy Agency, Ibaraki-ken, JP
Matsuda, N.
Japan Atomic Energy Agency, Ibaraki-ken, JP
Sakamoto, Y.
Japan Atomic Energy Agency, Ibaraki-ken, JP
Nakashima, H.
Japan Atomic Energy Agency, Ibaraki-ken, JP
Yashima, H.
Research Reactor Institute, Kyoto Univ., Osaka, JP
Matsumura, H.
High Energy Accelerator Organization, Ibaraki, JP
Iwase, H.
High Energy Accelerator Organization, Ibaraki, JP
Hirayama, H.
High Energy Accelerator Organization, Ibaraki, JP
Mokhov, N.
Fermi National Accelerator Laboratory, Batavia, IL, US
Leveling, A.
Fermi National Accelerator Laboratory, Batavia, IL, US
Boehnlein, D.
Fermi National Accelerator Laboratory, Batavia, IL, US
Vaziri, K.
Fermi National Accelerator Laboratory, Batavia, IL, US
Lauten, G.
Fermi National Accelerator Laboratory, Batavia, IL, US
Oishi, K.
Shimizu Corporation, Tokyo, JP
Nakamura, T.
Tohoku Univ., Miyagi, JP
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Developed by Committee: E10
Pages: 675–689
DOI: 10.1520/STP155020120051
ISBN-EB: 978-0-8031-7553-2
ISBN-13: 978-0-8031-7536-5