Multiple prompt gamma-ray analysis and construction of its beam line |
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| Authors: | M. Oshima Y. Toh A. Kimura M. Ebihara Y. Oura Y. Itoh H. Sawahata M. Matsuo |
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| Affiliation: | (1) Department of Materials Science, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan;(2) Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan;(3) Research Center for Nuclear Science and Technology, University of Tokyo, Yayoi 2-11-16, Bunkyo-ku, Tokyo 113-0032, Japan;(4) Graduate School of Arts and Sciences, University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan |
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| Abstract: | By combining neutron activation analysis with multiple gamma-ray detection (gamma-gamma coincidence), we have proved better sensitivity and resolution for the trace element analysis than the ordinary single gamma-ray detection method. We now try to apply the multiple gamma-ray detection method to the prompt gamma ray analysis (PGA). We have established a new cold neutron beam line for PGA in Japan Research Reactor, JRR-3M, at Tokai establishment of Japan Atomic Energy Research Institute (JAERI). It consists of a beam shutter, a beam attenuator, a gamma-ray detector array, a sample changer, and a beam stopper. We construct a high-efficiency gamma-ray detector array specially designed for this purpose. Its performance has been evaluated with the Monte Carlo simulation code, GEANT 4.5.0. |
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