Electron impact excitations of S2 molecules

Low-energy electron impact excitations of S2 molecules are studied using the fixed-nuclei R-matrix method based on state-averaged complete active space SCF orbitals. Integral cross sections are calculated for elastic electron collision as well as impact excitation of the 7 lowest excited electronic states. Also, differential cross sections are obtained for elastic collision and excitation of the a 1 Δ g , b 1 Σ g + and B 3 Σ u - states. The integrated cross section of optically allowed excitation of the B 3 Σ u - state agrees reasonably well with the available theoretical result.