Low-energy electron collisions with thioformaldehyde

Abstract

The elastic integral, differential, and momentum transfer cross sections and the excitation cross sections from the ground state to the first three low-lying electron excited states for low-energy (0--10 eV) electron collisions with thioformaldehyde (H${}_{2}$CS) molecule are calculated using the $R$-matrix method. Eighteen target states are included in the close-coupling formalism. Three core-excited shape resonant states (${}^{2}$${B}_{2}$,${}^{2}$${B}_{1}$,${}^{2}$${A}_{1}$) and three Feshbach resonant states (${}^{2}$${B}_{2}$,${}^{2}$${A}_{1}$,${}^{2}$${B}_{1}$) are determined for the ($N$ + 1)-electron H${}_{2}$CS${}^{\ensuremath{-}}$ system in the low-energy range. The dissociative electron attachment processes at the first two low-lying core-excited shape resonant states are proven by performing a series of scattering calculations, indicating the S${}^{\ensuremath{-}}$(${}^{2}P$) yields together with the CH${}_{2}$ fragment at three different states.