https://doi.org/10.1351/goldbook.A00366
- (in radiochemistry) An interaction between a particle and its @[email protected] in which they both disappear.
- (in photochemistry) Two atoms or molecular entities both in an excited @[email protected] interact often (usually upon collision) to produce one atom or molecular entity in an excited @[email protected] and another in its ground @[email protected] This phenomenon (annihilation) is sometimes referred to as @[email protected]See:singlet-singlet annihilation,spin conservation rule,triplet-triplet annihilation