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Shielding experiments of concrete and iron for the 244 MeV and 387 MeV quasi-mono energetic neutrons using a Bonner sphere spectrometer (at RCNP, Osaka Univ.)

EPJ Web of Conferences. 2017;153:08016 DOI 10.1051/epjconf/201715308016

 

Journal Homepage

Journal Title: EPJ Web of Conferences

ISSN: 2100-014X (Online)

Publisher: EDP Sciences

LCC Subject Category: Science: Physics

Country of publisher: France

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS


Matsumoto Tetsuro (National Institute of Advanced Industrial Science and Technology (AIST))

Masuda Akihiko (National Institute of Advanced Industrial Science and Technology (AIST))

Nishiyama Jun

Iwase Hiroshi

Iwamoto Yosuke (Japan Atomic Energy Agency (JAEA))

Satoh Daiki (Japan Atomic Energy Agency (JAEA))

Hagiwara Masayuki

Yashima Hiroshi (Research Reactor Institute, Kyoto University)

Shima Tatsushi (Research Center for Nuclear Physics (RCNP), Osaka University)

Nakamura Takashi

Harano Hideki (National Institute of Advanced Industrial Science and Technology (AIST))

Tamii Atsushi (Research Center for Nuclear Physics (RCNP), Osaka University)

Hatanaka Kichiji (Research Center for Nuclear Physics (RCNP), Osaka University)

EDITORIAL INFORMATION

Editorial review

Editorial Board

Instructions for authors

Time From Submission to Publication: 6 weeks

 

Abstract | Full Text

Neutron energy spectra behind concrete and iron shields were measured for quasi-monoenergetic neutrons above 200 MeV using a Bonner sphere spectrometer (BSS). Quasi-monoenergetic neutrons were produced by the 7Li(p,xn) reaction with 246-MeV and 389-MeV protons. Shielding materials are concrete blocks with thicknesses from 25 cm to 300 cm and iron blocks with thicknesses from 10 cm to 100 cm. The response function of BSS was also measured at neutron energies from 100 MeV to 387 MeV. In data analysis, the measured response function was used and the pingpong scattering effect between the BSS and the shielding material was considered. The neutron energy spectra behind the concrete and iron shields were obtained by the unfolding method using the MAXED code. Ambient dose equivalents were obtained as a function of a shield thickness successfully.