Electron—hydrogenlike-ion scattering

The $s$-, $p$-, and $d$-wave phase shifts have been calculated for elastic scattering of electrons by hydrogenlike ions ${\mathrm{He}}^{+}$, ${\mathrm{Li}}^{2+}$, ${\mathrm{Be}}^{3+}$, and ${\mathrm{B}}^{4+}$ 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 $e^{-}$-${\mathrm{He}}^{+}$ scattering, our singlet $s$-wave phase shifts differ by about 7.5% whereas for $e^{-}$-${\mathrm{B}}^{4+}$ scattering, agreement is very good.