Dissociative and non-dissociative ionization of the N2 molecule by the impact of 0.75-3.5 MeV He +

Total projectile electron loss and absolute dissociative and non-dissociative ionization cross sections of the N2 molecule in coincidence with the final projectile charge states have been measured for the impact of 0.75–3.5 MeV He+. Comparison is made with proton, He+ and electron impact data available in the literature for the direct ionization channels. The fragmentation fractions for singly-charged products follow a scaling law indicating that the main dynamical variables behind the fractions are the momentum transfer at intermediate velocities and the energy transfer at high velocities.