A GEOMETRICAL INTERPRETATION OF CROSS SECTIONS FOR AN ELECTRON-HYDROGEN ATOM IMPACT WITHIN A LABORATORY SYSTEM

摘要

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.