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A custom-made, on-site radioxenon sampling, separation and monitoring system was used to monitor atmospheric radioxenon concentrations in Beijing, released from the Fukushima Daiichi nuclear power plant after the earthquake of 11 March 2011. The results show that 133 Xe concentrations ranged from 393 to 26mBq/m 3 from 12 to 27 April 2011, and those of 131m Xe were 84 and 40mBq/m...
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