Energy and Angular Distribution of Electrons Ejected from Argon by 5-keV to 1.5-MeV Protons

Authors

T. L. Criswell, Battelle Memorial Institute, Pacific Northwest Laboratories, Richland, Washington
L. H. Toburen, Battelle Memorial Institute, Pacific Northwest Laboratories, Richland, Washington
M. Eugene Rudd, University of Nebraska - LincolnFollow

Date of this Version

1977

Comments

Published in Physical Review A 16, 508 - 517 (1977)
©1977 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevA.16.508
DOI: 10.1103/PhysRevA.16.508

Abstract

Cross sections, differential in emission energy and angle, have been measured for the ejection of electrons in collisions of H⁺ with argon gas targets. Incident-proton energies studied were from 5 keV to 1.5 MeV and electron emission angles ranged from 10° to 160°. Integration of the double-differential cross sections over emission angle and energy yield results in good agreement with direct measurement of total ionization cross sections. The electron distributions are compared to two plane-wave Born-approximation calculations, one using Hartree-Slater wave functions and the other using Hartree-Fock wave functions in the 3p-εd channel.