Comparison of target and projectile ionization near 0° forHe++,He+/Ar at 2 MeV

Abstract
Energy spectra of electrons with velocities near the ion velocity were measured and angular distributions were derived for both the He++/Ar and He+/Ar systems at 2 MeV. The data were compared to charge-exchange theories for target ionization and to an electron-scattering model for projectile ionization. It was found that in the forward direction target ionization and projectile ionization were indistinguishable on the basis of the ejected electron spectra.