The non-resonant two-photon zero kinetic energy photoelectron spectrum of CS 2

Abstract

The high-resolution zero kinetic energy photoelectron spectrum of CS 2 is presented. Accurate values for the ionization potential and the spin—orbit splitting of the X̃ + 2Π g are obtained. Observation of the symmetry-forbidden excitations of the v 2 bending vibration yields accurate frequencies for this normal mode. The Renner—Teller splitting for the Δ u 3 2 and the Σ − u components of v + 2 in the upper 2Π g 1 2 spin—orbit component has been resolved for the first time. The photoionization efficiency spectra show a strong counter-correlation of the CS + 2 and S + fragments.