Influences de l'énergie thermique et de la répartition d'énergie des électrons dans les mesures par impact électronique

The influence of thermal energy of atoms and molecules and of the energy distribution of electrons on results obtained from electronic impact experiments are analyzed. Special attention is devoted to the width of the peaks found in the spectra of elastically and inelastically scattered electrons. Results are presented in the convenient form of tables, graphs, and a nomogram in order that they may be easily accessible to researchers in the field of electronic collisions. The method used to calculate the influences of the experimental factors has also been used in the case of resonant elastic scattering of electrons in helium. These experimental factors are the thermal energy of the particles of the target and the spread of the electron energy.