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Sato, Tatsuhiko; Furuta, Takuya; Sasaki, Hidetaka*; Watabe, Tadashi*
no journal, ,
Current status and prospects of dosimetry research for targeted radiotherapy will be reviewed at the meeting
Watanabe, Yuki; Hosomi, Kenji; Kaneko, Junichi*; Arai, Tomohiro*; Takada, Chie
no journal, ,
no abstracts in English
Saito, Tatsuo
no journal, ,
RI waste is generated from the use of RI in universities, medical care, and research institutes, and from the dismantling of facilities, but it has not yet been finally disposed of for burial. Therefore, JAEA has been acting as an implementing agency for the disposal project of low-level radioactive wastes (wastes from research facilities, etc.), including RI wastes generated from research institutes, universities, and medical institutions, including JAEA. In order to obtain the understanding and cooperation of waste generators toward the early commencement of the disposal project, this report introduces the current status of the disposal of RI waste and the efforts being made for its burial.
Taira, Yoshitaka*; Sugita, Kento*; Okano, Yasuaki*; Hirade, Tetsuya
no journal, ,
Positron annihilation spectroscopy is a powerful analytical method that can measure vacant defects in crystals and microvoids in insulating materials. UVSOR-III is developing gamma-ray-induced positron annihilation spectroscopy using ultrashort pulse gamma rays. Specifically, we have succeeded in positron annihilation lifetime (PAL) measurement and positron age-momentum correlation (AMOC) measurement. PAL has succeeded in directly measuring the spectrum of only the sample. In addition, AMOC also succeeded in observing the positron annihilation only in the samples, which shows the different momentum distribution for the different defect states. At present, coincidence Doppler broadening (COB) measurement is also available, and a CDB spectrum with only positron annihilation from the sample will be obtained by the newly developed analysis program.
Kawahara, Rika*; Ochi, Kotaro; Yamaguchi, Katsuhiko*; Torii, Tatsuo*
no journal, ,
In this study, measurements using a Compton camera and video images using an optical camera were taken in the difficult-to-return zone in Hamadori, Fukushima Prefecture. The locations of radionuclides were then confirmed by combining the video images with the radiation distribution images taken by the Compton camera. By photographing the hot spot from various positions and angles, the three-dimensional spatial extent of the radiation source could be confirmed. As a result of measurements at different distances from the hot spot, the dose rate in the direction of the hot spot photographed by the Compton camera was generally proportional to the inverse square of the distance when there was only one hot spot in front of the hot spot. However, this was not always the case when hot spots existed at multiple locations.
Mo adsorption/
Tc elution propertyFujita, Yoshitaka; Seki, Misaki; Fujihara, Yasuyuki*; Suzuki, Tatsuya*; Yoshinaga, Hisao*; Takeuchi, Tomoaki; Nakano, Hiroko; Hori, Junichi*; Suematsu, Hisayuki*; Ide, Hiroshi
no journal, ,
no abstracts in English
Mo/TcFukumitsu, Nobuyoshi*; Yamauchi, Yusuke*; Kaneti, Y. V.*; Benu, D. P.*; Saptiama, I.*; Ariga, Katsuhiko*; Hatano, Kentaro*; Kumada, Hiroaki*; Fujita, Yoshitaka; Tsuchiya, Kunihiko
no journal, ,
no abstracts in English