Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-03-24
Journal of Environmental Radioactivity 102 (2011) 1032 - 1038
Physics
Nuclear Physics
Nuclear Experiment
7 pages, 5 figures, published in Journal of Environmental Radioactivity
Scientific paper
10.1016/j.jenvrad.2011.06.005
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 131-I, 132-I, 132-Te, 134-Cs, and 137-Cs 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 amounted to 4.4 +/- 1.3 mBq/m^3 of 131-I on 19-20 March.
Jaffe Dan A.
Kaspar Jan
Knecht Amanda
Leon Diaz J.
Miller Maike Luiken
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