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gamma decay

noun, Physics.
1.
type of radioactivity in which an unstable atomic nucleus dissipates energy by gamma emission, producing gamma rays.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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gamma de cay in Science
gamma decay  
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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