triplet-triplet annihilation
Two atoms or molecular entities both in a @[email protected] often interact (usually upon collision) to produce one atom or molecular entity in an excited @[email protected] and another in its ground @[email protected] This is often, but not always, followed by @[email protected]
See also:
annihilation (in radiochemistry, in photochemistry)
spin conservation rule
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2281 [Terms] [Paper]