ON THE DETERMINATION OF COMPTON PROFILES BY ELECTRON INDUCED K-SHELL IONIZATION

In a coincidence experiment we have measured the double differential cross section for K-shell ionization of Cu and Ag by electrons with energies of Eo = 140 and 200 keV. The results obtained are in accordance with those of a former experiment. A comparison with theory reveals a fairly good agreement with the calculations by Das at least for emitted electron energies in the vicinity of the Møller peak, while the predictions by Cooper and Kolbenstvedt exhibit a complete different behaviour. Finally, own calculations are presented that are based on a field theoretical approach in which the double differential cross section factorizes into a Compton profile and a kinematical factor