%A Kunc, Józef %D 2011 %T A GEOMETRICAL INTERPRETATION OF CROSS SECTIONS FOR AN ELECTRON-HYDROGEN ATOM IMPACT WITHIN A LABORATORY SYSTEM %K %X Two methods, the analytical and the numerical one, have been presented in this paper, of determination of differential cross sections for collisional ionization processes. Two analytical method is based upon a binary encounter approximation, while the numerical method - upon an analysis of three-body effects. Both methods have been mutually compared, and confronted with experimental data for the process of ionization of a hydrogen atom, as commenced with its ground state. The description of the methods involved has been presented in the form of a laboratory system of coordinates, as this latter is of a particular importance for the interpretation of results of the experiment. %U https://papers.itc.pw.edu.pl/index.php/JPT/article/view/82 %J Journal of Power Technologies %0 Journal Article %P 17-33%V 43 %@ 2083-4195