Complex scattering potential - Ionization contribution (CSP-ic) method for calculating total ionization cross sections on electron impact

摘要

In this article, we report calculations of total ionization cross sections, Q_(ion), for simple atoms (C, N, O, F) and molecules (NO and NH _3) of atmospheric interest on electron impact at energies from threshold to 2000 eV. We have employed the complex scattering potential - ionization contribution (CSP-ic) method for the present study. Attempt has been made to improve the method by computing the parameter that involves the ratio of sum of the total excitation cross sections (∑Q_(exc)) and total inelastic cross section (Q_(inel)) at the peak of the inelastic cross section. The present study not only provided a better estimation of the parameter involved in the CSP-ic method but also provided better agreement with the available experimental and theoretical data on the ionization cross sections of the simple atomic and molecular targets studied here.