Electron scattering with a SiF₂ molecule using the R-matrix method

Differential, integral, and momentum-transfer cross sections for the elastic scattering of electrons by SiF₂ have been calculated for the incident electron energy range of 0–10 eV. These results are obtained by using the R-matrix method. The close-coupling expansion of the wave function of the scattering used in the R-matrix formalism includes the lowest six target states. We have also calculated the excitation cross sections from the ground state X ¹A₁ to the first five excited states ³B₁, ¹B₁, ³B₂, ³A₁, and ¹B₂ from their respective thresholds up to 10 eV. The target states are represented by configuration-interaction wave functions that account for correlation effects. We detect a shape resonance in ²B₁ symmetry and a core-excited shape resonance in ²A₂ symmetry. We have included up to g-partial waves in the scattering calculation. For this polar molecule, higher partial wave contribution is accounted for by invoking a Born-closure approximation. Elastic cross-section results are compared with the other theoretical works available.