Study of CS2 in the 3–10 eV energy range by electron energy loss spectroscopy

Abstract

Electron impact energy loss spectra are obtained in CS2 in the energy loss range of 3–10 eV with high and medium energy resolution. Measurements have been performed at various incident electron energies (∼10–100eV) and scattering angles (4°–90°). The high energy resolution (∼25 meV) has made possible the detailed analysis of the vibrational progressions and Rydberg series, and some identifications are supported by the plots of the differential cross sections of the studied transitions. New bands are evidenced in the region of the low-lying states 3–5 eV and classifications are proposed. The features appearing between 6.5 and 10 eV are classified into ten Rydberg series converging to the X̃ 2Πg ground state of CS+2, and assignments are proposed for most of them. New triplet features are also evidenced around 6.6 eV, while the triplet character proposed by Greening and King for some transitions is not confirmed.