Scattering of electrons by gaseous CS(1Σ): The role of short-range forces on the very-low energy 2Π resonance

Quantum dynamical calculations are presented for the scattering of electron beams from gaseous carbon monosulfide in its ground electronic state (1Σ), and considered as occupying its ground rotovibrational level. The work focuses on the various symmetry components which contribute to the total integral, elastic cross sections and shows how different treatments of the short-range exchange effects are essentially producing the same partial cross section values and shapes over a very broad range of collision energies (from 1.0 to 100.0 eV) which are well above the very-low energy region. The further analysis of the very-low energy (∼0.7 eV) shape resonance of 2Π symmetry firstly confirms the quality of the exchange forces employed in the present work and additionally indicates the essential role of short-range correlation effects in locating that resonance.