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radioactive decay
(redirected from Atomic Decay)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.03 sec.
radioactive decay,
the disintegration of the nucleus of an unstable nuclide by the spontaneous emission of charged particles, photons, or both.

decay,
v to decompose.
decay, dental,
n See caries.
decay product,
n See daughter.
decay, radioactive,
n the disintegration of the nucleus of an unstable nuclide by the spontaneous emission of charged particles and/or photons.
decay, senile,

radioactive
characterized by radioactivity.

radioactive decay
spontaneous decomposition of the nuclei of the atoms of radioactive substances. Measured as the proportion of the atoms in a radionuclide that decompose per unit of time, usually stated as the half-life of that particular isotope.
radioactive fallout
dissemination of radioactive substances through the atmosphere and deposition on the environment generally; causes radiation injury.
radioactive isotope
radionuclide. A radioactive nuclide, e.g. radioactive iodine or strontium.
radioactive tracer
see radioactive tracer.


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