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Nagai, Yasuki; Makii, Hiroyuki; Namiki, Shinji; Iwamoto, Osamu; Iwamoto, Nobuyuki; Sawahata, Hiroyuki*
Journal of the Physical Society of Japan, 81(8), p.085003_1 - 085003_2, 2012/08
Times Cited Count:1 Percentile:10.83(Physics, Multidisciplinary)We propose to use the radionuclide Cs as a tracer. -ray energy of the most intense line from the decay of Cs is 668 keV, which is very near to that of the 662 keV from the decay of Cs, while the half-life of Cs is 6.5 d. Cs can be produced by nuclear reactions such as Cs(n,2n)Cs, Cs(r,n)Cs or Xe(p,n)Cs. The Cs tracer would be useful in the quantitative studies of radionuclide Cs contaminant in human, and in any experimental studies in the minimization of radionuclide Cs contamination in agricultural and stock farming products.
Oshima, 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:61.24(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.
Sasajima, Fumio; Sawahata, Hiroyuki*; Onizawa, Koji*; Ichimura, Shigeju; Otomo, Akitoshi; Ito, Yasuo*; Takayanagi, Masaji
JAERI-Tech 2000-073, 49 Pages, 2000/12
no abstracts in English
Yonezawa, Chushiro; ; ; Hoshi, Michio; Sawahata, Hiroyuki*; Ito, Yasuo*
Proc. of 9th Int. Symp. on Capture Gamma-ray Spectroscopy and Related Topics, 0, p.705 - 712, 1997/00
no abstracts in English
Yonezawa, Chushiro; ; Sawahata, Hiroyuki*; *; Hoshi, Michio; Ito, Yasuo*
Cancer Neutron Capture Therapy, 0, p.221 - 225, 1996/00
no abstracts in English
Yonezawa, Chushiro; ; Sawahata, Hiroyuki*; *; Hoshi, Michio; Ito, Yasuo*
KURRI-TR-413, 0, p.21 - 27, 1995/00
no abstracts in English
Endo, Kiyoshi*; Nakai, Kei*; Yoshida, Fumiyo*; Shirakawa, Shin*; Yamamoto, Tetsuya*; Matsumura, Akira*; Sawahata, Hiroyuki*; Kawate, Minoru*; Saito, Kimiaki; Kumada, Hiroaki; et al.
no journal, ,
no abstracts in English
Hirota, Koichi; Sawahata, Hiroyuki*
no journal, ,
Takasaki Advanced Radiation Research Institute has three irradiation facilities of ion-beam, -ray, and electron-beam aimed at developing cutting-edge technologies for advanced materials, environmental conservation, biotechnology, and medical application. These facilities are available for basic and applied researches by academics, national and local government institutes, and private companies under the cooperation program. For example, the cyclotron is used for researches on radiation-degradation phenomena of semiconductors for space use, controlled polymerization of nanowire, breed improvement etc. The -ray facilities contribute to diverse research themes and recent noteworthy work is development of radiation-resistant materials for the decommissioning of damaged Fukushima Daiichi Nuclear Power Plant. Users under this cooperation program have advantages of preferential utilization of machine time and utilization fee subsidization. This presentation focuses on the detail of this program with the examples of actual research results.