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beta decay
(redirected from Beta emission)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
decay /de·cay/ (de-ka´)
1. the decomposition of dead matter.
2. the process of decline, as in aging.
beta decay  disintegration of the nucleus of an unstable radionuclide in which the mass number is unchanged, but atomic number is changed by 1, as a result of emission of a negatively or positively charged (beta) particle.
tooth decay  dental caries.
beta decay,
a type of radioactivity that results in the emission of beta particles, either electrons or positrons. See also beta particle.


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