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Malins, A.; Ochi, Kotaro; Machida, Masahiko; Sanada, Yukihisa
Proceedings of Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo 2020 (SNA + MC 2020), p.147 - 154, 2020/10
Konoplev, A.*; Golosov, V.*; Laptev, G.*; Namba, Kenji*; Onda, Yuichi*; Takase, Tsugiko*; Wakiyama, Yoshifumi*; Yoshimura, Kazuya
Journal of Environmental Radioactivity, 151(Part 3), p.568 - 578, 2016/01
Times Cited Count：78 Percentile：92.19(Environmental Sciences)Sakamoto, Ryuichi; Saito, Kimiaki
Radiation Protection Dosimetry, 106(2), p.165 - 175, 2003/11
Times Cited Count：6 Percentile：41.75(Environmental Sciences)Conversion factors for the purpose of mobile survey by car were evaluated quantitatively to convert the gamma ray dose rate level measured on the road to that in the typical land-use around the road by simulation calculations. In the calculation, the width and the surrounding area of the road were assumed as being the real environment contaminated by 
Cs nuclide. The calculated conversion factors indicated to agree with the conversion factors measured in the field within the accuracy of 20%.
Yamamoto, Tetsuya*; Matsumura, Akira*; Yamamoto, Kazuyoshi; Kumada, Hiroaki; Shibata, Yasushi*; Nose, Tadao*
Physics in Medicine & Biology, 47(14), p.2387 - 2396, 2002/07
Times Cited Count：27 Percentile：57.08(Engineering, Biomedical)The aim of this study was to determine the in-phantom thermal distribution derived from neutron beams for intraoperative boron neutron capture therapy (IOBNCT). Gold activation wires arranged in a cylindrical water phantom with (void-in phantom) or without (standard phantom) a cylinder styrene form placed inside were irradiated by using the epithermal beam (ENB) and the mixed thermal-epithermal beam (TNB-1) at the JRR-4. The thermal neutron distribution derived from both the ENB and TNB-1 was significantly improved in the void-in-phantom, and a double high dose area was formed lateral to the void. The flattened distribution in the circumference of the void was observed with the combination of ENB and the void-in-phantom. The measurement data suggest that the ENB may provide a clinical advantage in the form of an enhanced and flattened dose delivery to the marginal tissue in which residual and/or microscopically infiltrating tumor.
Cs depth distribution in the Chernobyl groundsSakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro; Nagaoka, Toshi; Stolyarevsky, I.*; Glebkin, S.*; Tepikin, V.*; Arkhipov, N.*; Ramzaev, V.*; Mishine, A.*; et al.
Proceedings of 10th International Congress of the International Radiation Protection Association (IRPA-10) (CD-ROM), 5 Pages, 2000/05
no abstracts in English
*; Naramoto, Hiroshi; Ozawa, Kunio*;
Nuclear Instruments and Methods in Physics Research B, 39, p.724 - 727, 1989/00
Times Cited Count：15 Percentile：81.93(Instruments & Instrumentation)no abstracts in English
; ; Hotta, Hiroshi
Radiat.Res., 63(1), p.14 - 23, 1975/01
Times Cited Count：10no abstracts in English
Journal of the Physical Society of Japan, 37(5), P. 1469, 1974/05
no abstracts in English
Iijima, Kazuki; Sasaki, Takayuki*; Matoba, Daisuke*; Dohi, Terumi; Fujiwara, Kenso
no journal, ,
In this study, in order to estimate the on-site distribution, the concentrations of several radionuclides in off-site topsoil were evaluated along six traces of the radioactive plumes, and the characteristic of spatial distribution and depth profile was discussed. The tendency of inventories of Sr-90 and Pu-238 observed in off-site was consistent with that of observed in the previous on-site sampling, indicating that the estimation of on-site distribution of radionuclides based on the off-site was applicable. Concentration of Cs-137 drastically decreased from top of the surface to around 10 cm depth, then gradually decreased, suggesting that Cs-137 was strongly adsorbed at upper part. Surprisingly, the profile of Pu-239+240 was quite different from that of Pu-238, while it was similar to Am-241. It was considered that the behavior of Am-241 was strongly reflected by that of Pu-241, a parent of Am-241, and the deposition event of Pu-239+240 and Pu-241 was different from that of Pu-238.
