MEASUREMENT OF K-SHELL IONIZATION CROSS-SECTIONS OF FE AND MN BY ELECTRON-IMPACT

Measurements of K-shell ionization cross sections of Fe and Mn targets by the impact of electrons of 6-25 keV energy have been carried out. In the experiments thin targets with thick aluminium foil substrates w ere used. The influence on the measurements of electrons reflected fro m the aluminium substrate has been evaluated and corrected by a detail ed electron transport calculation. It is shown that the corrected K-sh ell ionization cross sections of Mn are in good agreement with existin g experimental data For Mn and Fe, the corrected measured cross sectio ns of K-shell ionization have been compared with the results of the em pirical formula given by Casnati et al.