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Super-radiant fluorescence of crystalline anthracene at low temperatures

✍ Scribed by Arne G. Bale; N.James Bridge; David B. Smith

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
506 KB
Volume
42
Category
Article
ISSN
0009-2614

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✦ Synopsis

The radiative lifetime of free excitons in anthracene is shown to be less than 1.9 ns at 5.4 K and appears to increase with temperature. This is attributed to the super-radiant behavlour predicted for states at the bottom Gf the exciton band.

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The fluorescence quantum yield and lifetime of crystalline benzene at low temperatures
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Measurements of the fluoresosnce lifetime of solid benzene (= 83.7 nscat -100Β°C) indic7ate that the limiting low temperature quantum yield of fluorescence is 0.22. This yi& is virtually identiui with that observed irr dUute low-temperature dispersions of benzene in EPA and hexanc. It therefore appea