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radioactive decay


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Spontaneous disintegration of a radionuclide accompanied by the emission of ionizing radiation in the form of alpha or beta particles or gamma rays.
  • n. An instance of such disintegration.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several processes by which unstable nuclei emit subatomic particles and/or ionizing radiation and disintegrate into one or more smaller nuclei.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation


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