223 nm photodissociation of OCS. Two components in S( 1D 2) and S( 3P 2) channels

Abstract

The speed and angular distributions of S( 1D 2 and 3P 2) atoms produced by 223 nm photodissociation of OCS have been measured by a two-dimensional ion imaging method. The S( 1D 2) and S( 3P 2) distributions exhibited similar features; the speed distributions consist of two Gaussian components, and the effective anisotropy parameters ( β eff) for the fast and slow components are about 0.1 and 1.0. The result suggests that the triplet products are produced by intersystem crossing following singlet-singlet optical transition(s).