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Singlet exciton annihilation in anthracene crystals

โœ Scribed by S. D. Babenko; V. A. Benderskii; V. I. Goldanskii; A. G. Lavrushko; V. P. Tychinskii

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
372 KB
Volume
45
Category
Article
ISSN
0370-1972

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โœฆ Synopsis

Abstract

The fluorescence quenching under high excitation intensities has been studied in anthracene crystals. The singletโ€“singlet annihilation constant of (1 ยฑ 0.5) ร— 10^โˆ’8^ cm^3^ s^โˆ’1^ is calculated from the quenching of fluorescence induced by a nitrogen 16 ns pulse laser (ฮป = 3371 ร…). The main process of quenching under longer illumination (2 ร— 10^โˆ’5^s) is the interection between singlet and triplet excitons with a rate constant of (7 ยฑ 4) ร— 10^โˆ’9^ cm^3^s^โˆ’1^.

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