Electron—hydrogenlike-ion scattering

The s-, p-, and d-wave phase shifts have been calculated for elastic scattering of electrons by hydrogenlike ions He⁺, Li²⁺, Be³⁺, and B⁴⁺ with the use the polarized-orbital method of Callaway et al. The present method takes account of exchange polarization explicitly following Sloan. Our s-wave triplet phase shifts are in very good agreement with those of the variational method. In the case of e^--He⁺ scattering, our singlet s-wave phase shifts differ by about 7.5% whereas for e^--B⁴⁺ scattering, agreement is very good.