Electron-impact single ionization for N+ ion

Electron-impact single ionization from levels of the ground configuration of the N+ ion is presented. Study analyses direct and indirect processes of the ionization. Convergence of the excitation-autoionization cross-sections is ensured by taking excitations up to shells with the principal quantum numbers n <= 10. The potential of the ionizing ion is used in the study. The scaled distorted wave cross-sections show a fairly good agreement with measurements. The study shows a presence of metastable states in the ion beams of experiments.