Non-dissociative and dissociative ionization of N₂, CO, CO₂, and CH₄by impact of 50-6000 keV protons and antiprotons

Abstract

Measurements of the cross section for non-dissociative single ionization and the cross sections for the creation of charged fragments have been performed for 50-6000 keV antiproton and proton impact on N₂, CO, CO₂, and CH₄. The results support the understanding of the ionization phenomenon that has been achieved via measurements with fundamental charged particles on atoms. The present high-energy antiproton fragmentation data supply a stringent test of the validity of the published electron-impact fragmentation data which, unfortunately, most of them fail.