本题目来源于试卷: Nuclear Energy; Effects and Uses of Radiation，类别为 IB物理学
[问答题]
People who work aroundr+yqs sn520z 2p o:rid m274abnzn n kh-a** byjetals that emit alpha particles are trained that there is little danger from proximity or even touching the material, but that they must take extreme precautions against ingesting it*y -za2h n4bnna jb*k7. Hence, there are strong rules against eating and drinking while working, and against machining the metal. Why?
参考答案:
Alpha particles cannot penetrate a person’s skin, so they do no biological damage even when a person works with or touches an alpha emitter. But, even if dust-sized pieces of the alpha emitter are ingested, then they can do a large amount of ionization damage directly to the exposed cells in your body. Thus, strict rules for employees that prohibit any eating and drinking while working around alpha emitters is an extremely wise precaution. Also, machining of alpha emitters is usually strictly prohibited, due to the fact that this process might create fine dust particles of the radioactive substance that could be inhaled.
本题详细解析:
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