A comparative study of elastic scattering of low-energy electrons by boron, aluminum and gallium trihalides

摘要

In this paper we present integral, differential and momentum transfer cross sections for elastic scattering of low-energy electrons by some metal-halogen molecular compounds, namely, BF_3, BCl_3, BBr_3, BI_3, AlF_3, AlCl_3, AlBr_3, AlI_3, GaF_3, GaCl_3, GaBr_3, and GaI_3. The pseudopotential based calculations were carried out with the Schwinger multichannel method at the static-exchange level of approximation. It is the purpose of this work to amke a comparative study of the scattering processes involving aluminum and gallium trihalides with previous results for the boron ones [M.H.F.Bettega, Phys. Rev. A61, 042703 (2000)]. We find through direct comparison of the elastic cross sections that, at low energies, the scattering processes are mainly dominated by the halogen atoms.