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ssbauer isomer shifts of 
Cs-impurity atoms implanted into metallic matricesMuramatsu, Hisakazu*; Yoshikawa, K.*; ; ; Miura, Taichi*; Watanabe, Satoshi; Koizumi, Mitsuo; Osa, Akihiko; Sekine, Toshiaki
JAERI-Review 99-025, TIARA Annual Report 1998, p.211 - 213, 1999/10
no abstracts in English
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Journal of Nuclear Science and Technology, 11(11), p.488 - 494, 1974/11
Times Cited Count：2no abstracts in English
Furuno, Akiko; Kijima, Yuichi; Tomita, Yutaka; Yamamoto, Yoichi
no journal, ,
This research aims at source term estimations of high-concentration detection events of Xe-133, which were observed at the CTBT IMS (International Monitoring System) Takasaki radionuclide monitoring station from the viewpoint of atmospheric dispersion analysis. Japan Atomic Energy Agency operates JPX38 in the Takasaki radionuclide station for noble gas monitoring, and conducts temporary measurement project of radioxenon at Horonobe in Hokkaido (JPX81) and Mutsu in Aomori (MUX88) as a part of the noble gas joint measurement project with CTBTO. The high-concentration detection events were frequently occurred not only at the JPX38 but also at the JPX81from the end of 2020 to January 2021. In the presentation, we will describe the source term estimation analysis of these high-concentration detection events, and discuss the relationship of the events between two stations.
Yamamoto, Yoichi; Furuno, Akiko; Kurihara, Toshiyuki; Tomita, Yutaka
no journal, ,
Radioxenon is a high-yield fission product which is an important tracer for a nuclear test, and is also emitted by civil nuclear facilities like isotope production facilities or nuclear power plants. The Ulaanbaatar radionuclide monitoring station (MNX45) in Mongolia has detected relatively high concentrations of Xe-133 exceeding 1 mBq/m
several times a year, despite the fact that there are no nuclear facilities in the vicinity that could be sources of emissions. To determine the source of emission, Atmospheric Transport Modelling (ATM) backtracking analyses for source estimation were carried out for five cases with consecutive detections of Xe-133 above 1 mBq/m since September 2023. For these cases, forward tracking analyses from the estimated sources of emissions were carried out to investigate the impact of detected Xe-133 on radionuclide monitoring stations located downwind from MNX45. We report on the analysis and results.
