The photoluminescence decay of single (1 cm 3 ) organic crystals has been observed over the time interval 0-250 nsec, using a pulsed light source, fast photomultiplier and pulse-sampling oscilloscope. The initial decay is exponential with decay time τ 0 : anthracene (fresh surface) 25.8 nsec, naphthalene 82 nsec, p -terphenyl 6.2 nsec, trans -stilbene 6.0 nsec. The decay of anthracene with an aged surface approximates to two successive exponentials with τ 1 similar 16 nsec, τ 2 similar 32 nsec. The decays of trans -stilbene, anthracene (fresh surface) and p -terphenyl are exponential over 100 nsec (similar 17 decay periods), 250 nsec and 100 nsec respectively.
No takes yet. Share an insight, caveat, or question.
Birks et al. (1962) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: