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Detection of radioxenon at Takasaki and Guangzhou after DPRK nuclear tests in 2016 and 2017

Kijima, Yuichi ; Yamamoto, Yoichi ; Oda, Tetsuzo

Xenon-133 was detected at CTBT Takasaki station in Japan (JPX38) after about 40 days from DPRK 4th nuclear test conducted on 6 January 2016 (DPRK-4). Xenon-133 and Xenon-131m were simultaneously detected at CTBT Guangzhou station in China (CNX22) after about 13 days from DRRK 5th nuclear test conducted on 9 September 2016 (DPRK-5). And Xenon-133 was detected at JPX38 after about 30 and 40 days from DRRK 6th nuclear test conducted on 3 September 2017 (DPRK-6). These radioxenon activity concentrations are all beyond background levels. We studied whether these radioxenon isotopes are originated from DPRK-4, DPRK-5 or DPRK-6 event though analysis by Atmospheric Transport Modelling (ATM).



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