The PRIMA programme has been developed for describing single- and multielectron ionization of neutral atoms by ion impact. Within the framework of the quasiclassical approach, combining the deposition energy model and statistical ionization probabilities, the new programme enables the calculation of ionization probabilities and cross sections of atoms by ion impact in the energy range from 1 keV to 10 MeV. As an example of the programme’s operation, calculations of ionization cross sections of neutral xenon by proton impact were performed. A comparison of the ionization cross sections calculated with the PRIMA programme with experimental data and with results obtained using the transport equation over a wide range of projectile ion energies shows that the discrepancies do not exceed a factor of 2–3.
Andreev et al. (Mon,) studied this question.