Detection of radioxenon at Takasaki and Ussuriisk in April 2013

Kijima, Yuichi; Yamamoto, Yoichi; Oda, Tetsuzo

no journal, , 

Following the third claimed nuclear test in DPRK on 12 February 2013 (DPRK-3), spectral analysis of radionuclide data and ATM simulation were performed by Japanese NDC-2 in charge of monitoring radionuclides. There was no significant detection of radioxenon in February 2013. However, early in April 2013, Xe-133 and Xe-131m were detected simultaneously far beyond normal background range of the activity concentration at Takasaki IMS station in Japan. And there were also simultaneous detections of Xe-133 and Xe-131m at Ussuriisk IMS station in Russia in mid-April, although these activity concentrations were within the normal background range. We studied the relations between these detections of radioxenon isotopes and DPRK-3 event.