PHOTON-ASSISTED DISSOCIATION OF ION-PAIRS IN NONPOLAR LIQUIDS - INFLUENCE OF THE EXTERNAL ELECTRIC-FIELD

The enhancement of the geminate ion pair dissociation probability, Del ta q/q, caused by a photon absorption by geminate electrons in nonpola r liquids is considered under the influence of the external electric f ield applied. The probability enhancement is calculated numerically wi thin the diffusion model. The value of Delta q/q is shown to decrease with increasing external field. The effect of the electric field on De lta q/q depends on the time interval between the instant of the electr on generation in liquid and the instant of electron photoexcitation. I n conclusion, suggestion is made as to how to take into account the ex ternal electric field in the interpretation of time resolved kinetic m easurements of the photon assisted increase of ionization quantum yiel d. (C) 1998 Elsevier Science S.A.