期刊
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
卷 102, 期 11, 页码 1032-1038出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2011.06.005
关键词
Radiation monitoring; Fission products; Germanium detector
资金
- US Department of Energy [DE-FG02-97ER41020]
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [1066032] Funding Source: National Science Foundation
We report results of air monitoring started due to the recent natural catastrophe on 11 March 2011 in Japan and the severe ensuing damage to the Fukushima Dai-ichi nuclear reactor complex. On 17-18 March 2011, we registered the first arrival of the airborne fission products I-131, I-132, Te-132, Cs-134, and Cs-137 in Seattle, WA, USA, by identifying their characteristic gamma rays using a germanium detector. We measured the evolution of the activities over a period of 23 days at the end of which the activities had mostly fallen below our detection limit. The highest detected activity from radionuclides attached to particulate matter amounted to 4.4 +/- 1.3 mBq M-3 of I-131 on 19-20 March. (C) 2011 Elsevier Ltd. All rights reserved.
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