Abstract
After the earthquake and the tsunami occurred in Japan on March 2011, four of the Fukushima reactors had released in air a large amount of radioactive isotopes that diffused all over the world. The presence of airborne 131I, 134Cs, and 137Cs in air particulate due to this accident were detected and measured in the Low Radioactivity Laboratory operating in the Department of Environmental Sciences of the University of Milano-Bicocca. The sensitivity of the detecting apparatus is of 0.2 uBq/m3 of air. Concentration and time distribution of these radiocontaminations ranging from a few to 400 uBq/m3 for the 131I and of a few tens of uBq/m3 for the 137Cs and 134Cs.
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