VUV Study of Electron Impact Dissociative Excitation of H$_{2}$S

The dissociative excitation of H$_{2}$S following electron impact has been studied in the electron energy range from threshold to 300 eV . H, S and S$^{+}$ emissions in the 90 to 170 nm region have been identified and quantified. The dominant Lyman-$\alpha $ feature at 121.6 nm has a measured emission cross section of (9.79 $\pm $ 0.67) x 10$^{-18}$ cm$^{2}$ at 100 eV. This was used to normalize 100 eV cross sections for all observed spectral features. Excitation functions of the dominant H and S emissions have been studied with particular emphasis on the near-threshold region. A number of dissociation channels have been identified.