Abstract
A comprehensive system for the study of nanosecond kinetics of transient absorbing species is described. It incorporates optical fibre cables facilitating 1.8-180 ns delay between the pump and probe beams. To test the system data were obtained for aerated solutions of anthracene in ethanol and cyclohexane. The build-up of the excited triplet population over approximately 10 ns was observed directly. The possibility of detecting short-lived intermediate states which neither absorb nor fluoresce is discussed.
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