Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A radioactive process in which an atomic nucleus loses energy by emitting a gamma ray without a change in its atomic or mass numbers.
- noun The decay of an unstable elementary particle by photon emission.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics A
nuclear reaction with theemission of agamma ray .
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