DOUBLE DIFFERENTIAL CROSS-SECTIONS IN E(-)-H IONIZATION

Double differential cross sections for the electron impact ionization of atomic hydrogen have been studied within the framework of the disto rted wave approximation which takes account of the effect of initial a nd final channel distortion. The incident energies considered are 40 e V, 100 eV and 250 eV and the ejected electron energies are 5 eV, 13.2 eV and 15 eV. The present results are compared with the experimental a s well as with available theoretical results and it is found that, exc ept at lower ejection angles, the agreement between our results and th e measured values is fair.