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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References in periodicals archive ?
Pokorski, "Theoretical uncertainties and phenomenological aspects of B [right arrow] X(s) gamma decay," Nuclear Physics, Section B, vol.
Q Value Abundance 1/2] (MeV) (%) 89Zr 3.27d 2.834 [beta]-0.2, EC 0.03 95Zr 65.5d 1.121 [beta]-1 49% [beta]-2 49% [beta]-3 2% Second route Nuclide Product Gamma decay mode after nuclide Decay [T.sub.
Natural sources of gamma rays on Earth include gamma decay from naturally occurring radioisotopes, and secondary radiation from atmospheric interactions with cosmic ray particles.