Home / Store / Journals / Electronic Articles / Nuclear Technology / Volume 168 / Number 3
Norikazu Kinoshita, Hiroshi Matsumura, Kotaro Bessho, Akihiro Toyoda, Kazuyoshi Masumoto, Yuki Matsushi, Kimikazu Sasa, Tsutomu Takahashi, Shozo Mihara, Toshiyuki Oki, Masumi Matsumura, Yuki Tosaki, Keisuke Sueki, Michiko Tamari, Yasuo Nagashima
Volume 168 / Number 3 / December 2009 / Pages 694-699
Format:electronic copy (download)
The evaluation of radioactivity induced in the concrete shield is important for the decommissioning of accelerator facilities. Specific activities of gamma-ray emitters of nuclear spallation products and thermal neutron capture products and beta-ray emitters such as tritium and 14C, and 36Cl in the concrete shield along the 12-GeV proton beam line (EP1 beam line, High Energy Accelerator Research Organization) were determined. The depth profiles of the radioactivity of each nuclide in the 6-m-thick concrete shield of the beam lines were compared, and the secondary particles and induced nuclear reactions were discussed.
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