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-ray analysis and construction of its beam lineOshima, Masumi; Toh, Yosuke; Kimura, Atsushi; Ebihara, Mitsuru*; Oura, Yasuji*; Ito, Yasuo*; Sawahata, Hiroyuki*; Matsuo, Motoyuki*
Journal of Radioanalytical and Nuclear Chemistry, 271(2), p.317 - 321, 2007/02
Times Cited Count：11 Percentile：61(Chemistry, Analytical)By combining neutron activation analysis with multiple -ray detection, we have proved better sensitivity and resolution for the trace element analysis than the ordinary single -ray detection method. We now try to apply the multiple -ray detection method to the prompt -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 -ray detector array, a sample changer, and a beam stopper. We construct a high-efficiency -ray detector array specially designed for this purpose. Its performance has been evaluated with the Monte Carlo simulation code, GEANT 4.5.0.
Miyamoto, Yutaka; Saito, Yoko; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu
Journal of Radioanalytical and Nuclear Chemistry, 271(1), p.83 - 88, 2007/01
Times Cited Count：0 Percentile：0.01(Chemistry, Analytical)Airborne dust samples were collected with a high-volume sampler at a fixed point in JAERI-Tokai for three years. Recently at JAERI-Tokai, a number of pine trees to arrest sand shifting was cut down. We analyzed the variation in elemental composition of the dust collected before and after felling the trees. It found, from the two-dimentional plots of ratio of elemental concentration such as Sc/Na-Cl/Na ratios, almost all samples consisted of mixture of sea-salt and soil. There were some differences between the elemental composition of the dust collected before and after felling the trees.
Hatsukawa, Yuichi; Toh, Yosuke; Oshima, Masumi; Kimura, Atsushi; Gharaie, M. H. M.
Journal of Radioanalytical and Nuclear Chemistry, 271(1), p.43 - 45, 2007/01
Times Cited Count：3 Percentile：25.42(Chemistry, Analytical)- coincidence of multiple -rays from the radioisotopes produced by neutron capture reactions was measured with a array of 19-Ge detectors with BGO Compton suppressors, GEMINI-II. Using multiparameter spectrometry, high sensitive determination of iridium in geological samples and I-129 in environmental samples were carried out at GEMINI.
