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We have investigated the scattering of electrons from atmospheric molecules NO, N2O, NO2, NO3 and N2O5 at incident electron energy Ei from the ionization threshold (∼10 eV) to 2000 eV. Basically total cross sections for elastic and inelastic collisions are calculated and hence total ionization cross sections are deduced in the ‘complex scattering potential-ionization contribution’ method, developed earlier. Various calculated cross sections are compared extensively with experimental and theoretical data wherever possible. Recommended data can now be prepared for the well-known NO target. New results are presented for lesser known targets.

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In the present paper, the inelastic mean free path (IMFP) of incident electrons is calculated as a function of energy for silicon (Si), oxides of silicon (SiO 2 ), SiO, and Al 2 O 3 in bulk form by employing atomic/molecular inelastic cross sections derived by using a semi-empirical quantum mechanical method developed earlier. A general agreement of the present results is found with most of the available data. It is of great importance that we have been able to estimate the minimum IMFP, which corresponds to the peak of inelastic interactions of incident electrons in each solid investigated. New results are presented for SiO, for which no comparison is available. The present work is important in view of the lack of experimental data on the IMFP in solids.