No abstract

The fluorescence quenching under high excitation intensities has been studied in anthracene crystals. The singlet-singlet annihilation constant of (1 f 0.5) x cm8 s-l is calculated from the quenching of fluorescence induced by a nitrogen 16ns pulse laser (A = 3371 A). The main process of quenching under longer illumination (2 x lod s) is the interaction between singlet and triplet excitons with a rate constant of (7f4) x 10-8cmS s-l.HccneaosaHo Tyrueme $nyopecUeHUm KpHcTannoB aHTpaUeHa np11 BMCOKE~X YPOBHIIX BOa6yXneHHII. HOHCTaHTa CHHrJIeT-CEIHI' JIeTHOfi aHHHrEIn$lUHH, HafiAeHHaR I13 TYrUeHHR $JIYOpeCUeHlJHH, BO36yXaaeMOfi IlMnyJrbCaMIl a30THOr0 Jla3epaRBJIReTCH B3aHMOHefiCTBHe CElHrJleTHbIX H TpHllJIeTHbIX BKCHTOHOB C HOHCTaHTOP CKOPOCTH (7 f 4) x C M~ ceK-' .

No abstract

No abstract

No abstract