Electron-impact dissociative excitation of S2

Abstract

Electron-impact dissociation of S2 has been studied by observation of the atomic emission features in the vacuum ultraviolet spectral region between 120 and 170 nm. The predominantly S2 targets were prepared by passing either S8 or CS2 through a microwave discharge. The excitation function of the S [3s23p4–3s23p3(2D°)4s, 3P-3D°] emission multiplet has been measured at 147.4 nm for electron-impact energies from below threshold to 370 eV. From appearance energy measurements in the near-threshold region, likely fragmentation channels are identified.