Calculations of elastic scattering cross sections at large angles between electrons and multiply charged ions in the distorted-wave approximation

The elastic differential cross sections of electrons scattered from one- and two-electron multiply charged ions are calculated within the first-order distorted-wave approximation. The exchange amplitude is found to be important for scattering at large angles. The results are compared with previous calculations and with experimental differential cross sections at 180o derived from analysing the binary-encounter electron spectrum from the collision of 19-30 MeV F7+ and F8+ ions with H2 and He targets. (author)