Raman scattering cross sections and polarizability derivatives of H 2S, D 2S, and HDS

Abstract

Absolute Raman scattering cross sections have been measured for the trace and anisotropy scattering of gaseous H 2S and several mixtures containing varying amounts of H 2S, D 2S, and HDS. The trace scattering cross sections have been interpreted in terms of a set of two isotopically invariant ∂ α ∂S j parameters and the isotopic mole fractions. For the anisotropy cross sections, the analysis is complicated by the fact that there are two polarizability components which contribute to each of the totally symmetric modes, together with the fact that the bands due to the two stretching modes overlap in the spectra of H 2S and D 2S. Relations between these polarizability components were determined from analyses of ro-vibrational band profiles in the H 2S spectra. These relations were used as constraints in the analysis of the anisotropy cross sections, to obtain approximate values for each of the polarizability component derivatives.