UV studies of electron impact excitation of CS2

We report the first measurements of emission cross sections of CS2 by electron impact over the wavelength interval 110 to 510 nm. Absolute emission cross sections are obtained at 100 eV for all spectral features observed in the interval. The important electronic transitions listed in decreasing order of their emission cross sections at 100 eV are the ionization transitions CS2+(? 2Σu+→? 2Πg) in the middle UV, CS2+(? 2Πu→? 2Πg) in the visible, the dissociative excitation transition CS(A 1Π→X 1Σ+) in the middle UV, and individual carbon and sulfur multiplets in the VUV. Emission cross sections as a function of electron energy (0–125 eV) are reported for several of the important electronic transitions.