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Hot snow

作者:帅鲽    发布时间:2019-03-07 01:18:09    

By Rob Edwards SNOW on the summit of Mont Blanc, western Europe’s highest mountain, is 80 times as radioactive as that anywhere else in the Alps, French scientists have discovered. Radon gas seeping into the snow from crevasses in the rock is the source of the radioactivity. Radon is a decay product of uranium, traces of which occur naturally in granite. Radon in turn decays into a radioactive isotope, lead-210,

 

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