Speaker
Dr
Yosuke Iwamoto
(Japan Atomic Energy Agency)
Description
The neutron energy spectra penetrating 10 to 100 cm thick iron and 25 to 200 cm thick concrete shields have been measured using 138, 243 and 387 MeV quasi-monoenergetic neutron sources at the Research Center for Nuclear Physics (RCNP) facility, Osaka University, Japan. The source neutrons were produced from a 1 cm thick lithium target bombarded with 140, 245 and 388 MeV protons. Two types of NE213 liquid organic scintillators （12.7-cm-diam x 12.7-cm-length and 25.4-cm-diam x 25.4-cm-length）and Bonner ball neutron spectometers were used for the neutron energy spectrum measurement. The response function and the neutron detection efficiency for an NE213 have already been measured. The TOF and unfolding methods were applied to estimate the energy spectra behind the shield in the peak energy region and continuous energy region, respectively. We have also measured the neutron energy spectra and angular distribution of the source neutron above 1 MeV in the angular range from 0 to 30 degrees with the TOF method. All measured data were compared with the PHITS Monte Carlo calculations.
Primary author
Dr
Yosuke Iwamoto
(Japan Atomic Energy Agency)
Co-authors
Dr
Akihiko Masuda
(Advanced Industrial Science and Technology)
Dr
Atsushi Tamii
(RCNP, Osaka university)
Dr
Christian Pioch
(German Research Center for Environmental Health)
Dr
Christian Theis
(CERN)
Dr
Daiki Satoh
(Japan Atomic Energy Agency)
Dr
Eduard Feldbaumer
(CERN)
Dr
HIroshi Nakashima
(Japan Atomic Energy Agency)
Dr
Hiroshi Iwase
(KEK)
Dr
Hiroshi Yashima
(Kyoto University)
Dr
Jun Nishiyama
(Advanced Industrial Science and Technology)
Prof.
Kichiji Hatanaka
(RCNP, Osaka university)
Dr
Lukas Jaegerhofer
(CERN)
Dr
Masayuki Hagiwara
(KEK)
Prof.
Takashi Nakamura
(Tohoku University)
Dr
Tatsuhiko Sato
(Japan Atomic Energy Agency)
Dr
Tetsuo Matsumoto
(Advanced Industrial Science and Technology)
Dr
Toshiro Itoga
(RIKEN)
Dr
Vladimir Mares
(German Research Center for Environmental Health)
Dr
Yoshihiro Nakane
(Japan Atomic Energy Agency)
Dr
Yukio Sakamoto
(Japan Atomic Energy Agency)
