Electronic excitation of hydrogen sulphide by impact with (near-threshold) low-energy electrons

Abstract

Electronic excitation of H₂S by impact with near-threshold-energy electrons has been studied. Comparison of the electron scattering data with optical spectra has led to the location of a number of optically forbidden electronic states. Of these, states at ca. 5.4 and 5.8 eV excitation energy are assigned as the lowest-lying triplet states ³B₁ and ³A₂′, respectively. A broad energy-loss band at ca. 7.4 eV is assigned to a valence-excited state of ¹A₂ symmetry, while structure at 8.55 eV is ascribed to excitation of a Rydberg ¹A₂ state.