Abstract
Electron impact ionisation of atomic hydrogen is calculated in the energy range 13.6-27 eV by numerically following the time evolution of a wavepacket. All dynamical degrees of freedom are included and total angular momenta L<or=2 have been considered. Plots of differential probability against ejection energy and the angle theta between the outgoing electrons reveal a strong influence of the interelectronic repulsion. Although angles theta approximately 180 degrees are favoured, another more isotropic mechanism can be distinguished. The slope of the total cross section near threshold has been extracted and found to agree with experiment.