Photodissociation dynamics of H 2S at 266 nm via the degenerate four-wave mixing spectroscopy

Abstract

Photodissociation dynamics of H 2S has been studied using the degenerate four-wave mixing (DFWM) technique at 266 nm and room temperature. The DFWM spectra of SH A 2Σ−X 2Π i (0,0) transitions have been observed and the nascent rotational distributions, spin-orbit state ratio, and Λ-doublet population ratio of the SH fragments have been extracted. The rotational distributions are cold and characterized by a Boltzmann temperature of 348±20 K for the SH( 2 Π 3 2 ) state. The Λ-doublet population ratio has been found to be close to unity. The SH( 2 Π 3 2 )/ SH( 2 Π 1 2 ) ratio has been observed to be 3.50±0.18.