Orientation and alignment parameters for 2p state of H in the Coulomb-projected Born approximation

The 90 degrees optical polarization of Lyman alpha and the Fano-Macek (1973) orientation and alignment parameters of the 2p state of H have been calculated in the Coulomb-projected Born approximation and its generalization. Results are presented for the polarization resulting from impact with electrons with energy in the range 40-200 eV. Contour maps for the rate of coincidence between scattered electrons and Lyman alpha photons emitted in the scattering plane are given for incident energies of 100 eV.