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A new carrier-generation mechanism is observed in anthracene and is attributed to singlet-triplet annihilation. The rate constant for ionization following this annihilation is estimated to be αST10^-12 cm³ sec^-1. The experiments give also a new value for the singlet-singlet annihilation rate constant, αSS2.10^-11 cm³ sec^-1. The possibility of other interpretations of the data is discussed.
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Fourny et al. (1968) studied this question.
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