Kiyoshi Nomura
Tokyo University of Science
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Publication
Featured researches published by Kiyoshi Nomura.
Applied Radiation and Isotopes | 2018
Kiyoshi Nomura; Akira Yunoki; Masayuki Hara; Yuko Morito; Akira Fujishima
A flexible γ detector using a liquid scintillation light guide (LSLG) was developed. The analyzed pulse height (PHA) spectrum depended on the diameter, length and scintillator concentration of the LSLG, and the distance of a γ ray irradiation point from the head of photomultiplier tube (PMT). From the analysis of PHA spectrum, it was found that the count ratio of two divided channel regions linearly decreases as the distance from the PMT head increases. It was further found that the radiation dose rate can be estimated by setting the flexible LSLG tube to a circular shape since the count rate is proportional to the dose rate measured by a conventional NaI (Tl) scintillation detector. Therefore, a flexible and long LSLG detector using a single PMT is useful for determination of the dose rate and has a potential to detect local contaminations in a certain narrow space.
Journal of Radioanalytical and Nuclear Chemistry | 2017
Ryoken Shiobara; Kenta Komatsubara; Yuichi Kurihara; Kiyoshi Nomura; Yuya Koike
Radioactive ishikawaite was characterized and the leaching behavior of U and Th series nuclides from ishikawaite was studied. With the pH values of dilute HCl solutions, the activity ratios of 226Ra/228Ra and 230Th/232Th in the leachate decreased, whereas the activity ratios of 224Ra/228Ra and 228Th/232Th increased. The leaching behavior of annealed ishikawaite was different from that of original ishikawaite. The leaching behavior of U and Th series nuclides is considered due to the different crystallinity and dominant U in ishikawaite as well as due to mineral damages by α-particles and recoiled atoms.
Hyperfine Interactions | 2016
P. B. Krastev; H. P. Gunnlaugsson; Kiyoshi Nomura; V. Adoons; A. M. Gerami; K. Johnston; M. Ncube; R. Mantovan; H. Masenda; Yuri Matveyev; T. E. Mølholt; I. Unzueta; K. Bharuth-Ram; H.P. Gislason; Guido Langouche; D. Naidoo; S. Olafsson
Croatica Chemica Acta | 2015
Kiyoshi Nomura
Hyperfine Interactions | 2016
Ayyakannu Sundaram Ganeshraja; Kiyoshi Nomura; Junhu Wang
Hyperfine Interactions | 2016
Kiyoshi Nomura; Shigeyo Suzuki; Yuya Koike; Hongling Li; Atsushi Okazawa; Norimichi Kojima
European Journal of Inorganic Chemistry | 2016
Yanjie Wang; Kiyoshi Nomura; Xin Liu; Alexandre I. Rykov; Changzi Jin; Tao Liu; Junhu Wang
Hyperfine Interactions | 2016
A. Mokhles Gerami; K. Johnston; H. P. Gunnlaugsson; Kiyoshi Nomura; R. Mantovan; H. Masenda; Yuri Matveyev; T. E. Mølholt; M. Ncube; S. Shayestehaminzadeh; I. Unzueta; H.P. Gislason; P. B. Krastev; Guido Langouche; D. Naidoo; S. Olafsson
Hyperfine Interactions | 2016
Kiyoshi Nomura; E. Kuzmann; Vijay K. Garg; A. C. de Oliveira; S. Stichleutner; Z. Homonnay
Applied Surface Science | 2018
Ayyakannu Sundaram Ganeshraja; Kaixin Zhu; Kiyoshi Nomura; Junhu Wang