Abstract
Low-energy electron-ejection cross sections of atoms in collisions with relativistic electrons have been calculated. The calculations are similar to those of Weber et al. In the approximate integration of the differential cross section over certain angles, Weber et al. considered Z small and obtained a (αZ)4-dependent result. We have followed a different type of approximation, valid for Z1, and obtained the explicit (αZ)5-dependent result. The result shows a much stronger dominance of the distribution of ejected electrons over the "Parzen distribution" in the low-energy region than the results of Weber et al. when applied to atoms with Z1.