Dissociative electron attachment dynamics of carbon disulfide and violation of axial recoil approximation near 6 eV resonance

Abstract

Complete dissociation dynamics of low-energy electron attachment to carbon disulfide have been studied using the velocity slice imaging (VSI) technique. The ion yields of the different fragment anions produced due to the dissociative electron attachment to carbon disulfide for the 5 to 11 eV incident electron energy range have been collected. Two resonances for S⁻ ions are observed at around 6.2 eV and 7.7 eV, while only one resonance for both the CS⁻ and S₂⁻ ions at 6.2 eV is present in this energy range. The kinetic energy and the angular distributions of these fragment negative ions at different incident electron energies around the 6.2 eV resonance have been extracted from the velocity slice images. These experimentally obtained angular distributions of different fragment anions combined with previous theoretical calculations provide a detailed picture of the breakdown of axial recoil approximation and the complete dissociation dynamics involved in this resonance.