Distributions in Energy and Angle of Electrons Ejected from Molecular Nitrogen by 0.3- to 1.7-MeV Protons

Cross sections, differential in ejection energy and angle, for electron emission from nitrogen following proton impact were measured for protons with energies from 0.3 to 1.7 MeV. Electrons were detected at emission angles from 20^∘{} to 130^∘{} with energies from a few eV to approximately 4000 eV. Cross sections differential in energy were obtained from the doubly differential cross sections by integration with respect to the emission angle. These results were compared with cross sections calculated from binary-encounter theory. Agreement between the calculated and measured cross sections was within experimental uncertainties (25%) throughout most of the energy range of the ejected electrons. K-shell ionization cross sections for nitrogen were also estimated from the intensity of the K Auger electrons emitted following proton impact.