gamma decay


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Related to gamma decay: Electron capture, alpha decay, beta decay

gamma decay

n.
1. A radioactive process in which an atomic nucleus loses energy by emitting a gamma ray without a change in its atomic or mass numbers.
2. The decay of an unstable elementary particle by photon emission.
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Natural sources of gamma rays on Earth include gamma decay from naturally occurring radioisotopes, and secondary radiation from atmospheric interactions with cosmic ray particles.
We now know that there are many other types of decay, but alpha, beta and gamma decay are the most common.
gamma]] for d(n,[gamma])t is about 10 times larger than for p(n,[gamma])d due to the parity conserving part of the gamma decay, M1 transition, being suppressed relative to the PNC part, an E1 transition [6] [7].