FLUORESCENCE OF DYES AT SUPERSATURATION P UMP POWERS

An analysis was made of the hypothesis that the lifetime of excited pa rticles is reduced, by a large factor, in optical fields of supersatur ation intensities. This hypothesis had been put forward earlier to acc ount for the unusual increase in the fluorescence intensity of dyes at high pump powers. The profiles of the pump and fluorescence pulses we re recorded for an ethanol solution of phenalemine F-510 with the exci ted-particle lifetime 6.6 ns when the pump intensity was I-0 = 10(23) -10(27) cm(-2)/s at lambda = 532 nm. The excited-particle lifetime of 6.6 ns was not affected by high pump intensities.