Gamma-decay definitions

A radioactive process in which an atomic nucleus loses energy by emitting a gamma ray without a change in its atomic or mass numbers.
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The decay of an unstable elementary particle by photon emission.
noun
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A radioactive process in which an atomic nucleus loses energy by emitting a gamma ray (a stream of high-energy photons). When an element undergoes gamma decay its atomic number and mass number do not change.
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(physics) A nuclear reaction with the emission of a gamma ray.
noun
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