Activities of gamma-ray emitting isotopes in rainwater from Greater Sudbury, Canada following the Fukushima incident
Activities of gamma-ray emitting isotopes in rainwater from Greater Sudbury, Canada following the Fukushima incident
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福岛事件后加拿大大萨德伯里雨水中伽马射线发射同位素的活动
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
E. Vázquez
中科院分区：
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作者：
B. Cleveland;F. Duncan;I. Lawson;N. Smith;E. Vázquez
我们报告了2011年4月3日、16日、20日和26日在加拿大东部大萨德伯里地区收集的雨水样品中测得的放射性。在锗探测器中对样品进行γ射线计数，观察到235 U裂变产生的同位素131 I和137 Cs，以及133 Cs中子捕获产生的134 Cs，与水的参考样品相比，其水平升高。这些活动的增加是由于3月11日地震和海啸后日本福岛第一核反应堆发生的事故。在任何时候观察到的活动水平都不会引起健康问题。
We report the activity measured in rainwater samples collec ted in the Greater Sudbury area of eastern Canada on 3, 16, 20, and 26 April 2011. The samples were γ-ray counted in a germanium detector and the isotopes 131I and 137Cs, produced by the fission of235U, and 134Cs, produced by neutron capture on 133Cs, were observed at elevated levels compared to a reference sample o f ic -water. These elevated activities are ascribed to the accident at the Fuku shima Dai-ichi nuclear reactor complex in Japan that followed the 11 March earthqua ke and tsunami. The activity levels observed at no time presented health concer ns.