Theoretical study of low-energy electron-SiH₄collisions using exact-exchange plus parameter-free polarization potential

The authors investigate rotationally elastic, inelastic and summed processes in the e-SiH 4 collisions at 0.001-20 eV. In these calculations, the electron exchange interaction is treated exactly in an iterative approach, while the target charge correlation and polarization effects are included using a parameter-free model polarization potential based on the second-order perturbation energy. The coupled integro-differential equations are set up in the one-centre-expansion scheme under the fixed-nuclei approximation. Results on the differential, integral, momentum transfer, viscosity and energy-loss cross sections are presented and compared with other available data (both theoretical and experimental). The value of the scattering length is also reported.