We report integral and differential cross sections for elastic scattering of electrons by $X{\mathrm{H}}_4$ $(X=\mathrm{C},\mathrm{}\mathrm{S}\mathrm{i},\mathrm{}\mathrm{G}\mathrm{e},\mathrm{}\mathrm{S}\mathrm{n},\mathrm{}\mathrm{Pb})$ molecules for energies between 3 and 10 eV. We use the Schwinger multichannel method with pseudopotentials [Bettega et al., Phys. Rev. A $47,$ 1111 (1993)] at the static-exchange and static-exchange plus polarization approximations. We compare our results with available theoretical and experimental results and find very good agreement. In particular, our results show Ramsauer-Towsend minima for all $X{\mathrm{H}}_4$ molecules.

• Received 8 November 2002

DOI:https://doi.org/10.1103/PhysRevA.68.012706