Satoru Hatakeyama
Japan Radioisotope Association
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Publication
Featured researches published by Satoru Hatakeyama.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
Hisao Yamamoto; Satoru Hatakeyama; Toshiyuki Norimura; Takehiko Tsuchiya
Abstract A radiation detector was fabricated from a commercial silicon photodiode, after removing its transparent cover cap and surface coating. The window thickness of the detector fabricated was evaluated to be 23 μg/cm2. The area of the depletion region was 13.2 mm2 and its depth was estimated to be about 100 μm. The energy resolution (FWHM) was 2.0 keV for conversion electrons (62.52 and 84.23 keV) from 109Cd and 1.8 keV for γ-rays (26.34 and 59.54 keV) from 241Am at room temperature. The lowest limit of measurable energy was about 5 keV for photons and 6 keV for electrons.
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 1991
Hisao Yamamoto; Satoru Hatakeyama; Toshiyuki Norimura; Takehiko Tsuchiya; Akira Katase
Abstract Assuming that β-rays are emitted isotropically from a 14C standard source, the detection efficiency of a semiconductor detector has been found to be above 100%. Such an unreasonable value is shown to be induced by the anisotropy of the β-ray emission from the standard source. The anisotropy is ascribed to the difference in the absorption of β-rays in the source depending on the angle of emission. The effect of anisotropy on the counting efficiency is evaluated and a correction method for its effect is described.
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 1996
S. Futatsugawa; Satoru Hatakeyama; Y. Saitou; K. Sera
Abstract Standard experimental procedures of PIXE in NMCC are described. We are engaged in researches on PIXE analysis and PET study by use of a small cyclotron in collaboration with CRC. The facilities are opened to scientists in Japan. As the research fields of the scientists are very wide, many kinds of samples are analyzed by PIXE. We established standard experimental procedures for those various samples. Preparation of the samples must be easy and simple to minimize risks of contamination and nonuniformity. We usually use silver nitrate or indium salt as an internal standard. Specific absorbers are often used to attenuate X-rays from a major matrix in specific samples.
Journal of Nuclear Science and Technology | 2012
Yasushi Sato; Takahiro Yamada; Toshikazu Suzuki; Chie Toramatsu; Akira Yunoki; Yoshio Hino; Hideki Harano; Tetsuro Matsumoto; Tetsuya Shimoyama; Tadahiro Kurosawa; Masahiro Kato; Katsuhisa Kudo; Mikio Matsumoto; Kenji Suzuki; Satoru Hatakeyama; Kouichi Doi; Yoshihiro Saito; Kazutoshi Suzuki; Toshimitsu Fukumura; Katsuhiro Miyamoto; Akinori Iwamoto; Kenichi Endo; Shohei Matsubara
A new calibration technique, referred to as e-trace, has been developed by the National Institute of Advanced Industrial Science and Technology (AIST). The e-trace technique enables rapid remote calibration of measurement equipment and requires minimal resources. We calibrated radioisotope calibrators of the Japan Radioisotope Association (JRIA) and the Nishina Memorial Cyclotron Center (NMCC) remotely and confirmed that remote calibration provided results that are consistent with the results obtained by existing methods within the limits of uncertainty. Accordingly, e-trace has been approved as the standard calibration method at AIST. We intend to apply remote calibration to radioisotope calibrators in hospitals and isotope facilities.
Archive | 2007
Yasushi Sato; Akira Yunoki; Yoshio Hino; Tadahiro Kurosawa; Masahiro Kato; Hideki Harano; Tetsuro Matsumoto; Tetsuya Shimoyama; Katsuhisa Kudo; Takahiro Yamada; Mikio Matsumoto; Kenji Suzuki; Satoru Hatakeyama; Kouichi Doi; Yoshihiro Saito; Toshikazu Suzuki; Kazutoshi Suzuki; Toshimitsu Fukumura; Katsuhiro Miyamoto; Chie Toramatsu; Akinori Iwamoto; Kenichi Endou; Shouhei Matsubara
the new calibration technique ‘e-trace’ has been developed by AIST. Using e-trace, measurement equipment in remote place can be calibrated in short time and limited resources. We calibrated radioisotope calibrators of JRIA and NMCC remotely. It was confirmed that the results of remote calibration was consistent with those of former method within uncertainty. As a result, e-trace is approved as a regular calibration method at AIST. We plan to apply remote calibration to the calibration of the radioisotope calibrators in hospitals and isotope facilities.
Radioisotopes | 1984
Hisao Yamamoto; Satoru Hatakeyama; Toshiyuki Norimura; Takehiko Tsuchiya
Journal of UOEH | 1989
Toshiyuki Norimura; Takehiko Tsuchiya; Satoru Hatakeyama; Hisao Yamamoto; Shunzo Okajima
Journal of UOEH | 1988
Takehiko Tsuchiya; Toshiyuki Norimura; Hisao Yamamoto; Satoru Hatakeyama; Seitaro Dohi; Naoki Kunugita
Journal of Radiation Research | 1988
Takehiko Tsuchiya; Toshiyuki Norimura; Miyuki Nikaido; Hiroyo Kakihara; Hisao Yamamoto; Satoru Hatakeyama
Radioisotopes | 1992
Syoji Futatsukawa; Satoru Hatakeyama; Yasuko Kaneko; Yoshihiro Saito; Kouichiro Sera; Kentaro Hatano; Toshiaki Sasaki
Collaboration
Dive into the Satoru Hatakeyama's collaboration.
University of Occupational and Environmental Health Japan
View shared research outputsUniversity of Occupational and Environmental Health Japan
View shared research outputsNational Institute of Advanced Industrial Science and Technology
View shared research outputsNational Institute of Advanced Industrial Science and Technology
View shared research outputsNational Institute of Advanced Industrial Science and Technology
View shared research outputs