ABSTRACT
This chapter explores the dependence of the emission cross sections on the electron energy and quantum numbers of excited states. The thin target has to provide conditions for the single collisions, to avoid processes caused by secondary electrons and radiation trapping. When the same cross section has been obtained by different authors, the data were compared after renormalization. If the data were in close agreement, then the averaged values or the most accurate data were listed in the tables. In the case of large discrepancy of the data, the results of theoretical consideration or measurements of excitation cross sections were taken into account. It is necessary to remember that in most cases the initial part of energy dependence was least accurately measured and this interpolation is rather rough. The emission cross section energy dependencies for different atomic lines differ from each other due to transition energies, branching and cascades.
