The influence of ?communicating states? on the dissociation yield in theS 1 of benzene

Abstract

Non-radiative communicating states rate calculations forS 1 ⇝S 0 transitions in benzene are presented. The contribution ofC 6 H 5+H predissociation to the non-radiative rates with varying excess energy is investigated. Local modes with Morse oscillators for CH-stretch vibrations are introduced. In the channel-three region one finds that much less than 1% of the initial excited energy is found to be of discrete continuum character.C 6 H 5+H vibrational predissociation does not conform to the strong increase of “pure internal conversion” for high excess energies. The steep decrease of the dissociation yield at still higher excess energies is found to be closely related to the energy acceptor behaviour of the (harmonic) out-of-plane modes.