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alpha radiation

noun

  1. alpha particles emitted from a radioactive isotope
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


alpha radiation

  1. Particles sent out by some radioactive nuclei , each particle consisting of two protons and two neutrons bound together. Alpha particles carry a positive charge . ( See beta radiation and gamma radiation .)
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Notes

Alpha radiation, unlike gamma radiation, has low penetrating power; it can be stopped by clothing.

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