Ejected-electron spectra in proton-atomic hydrogen collisions
- 14 December 1991
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 24 (23) , L599-L604
- https://doi.org/10.1088/0953-4075/24/23/008
Abstract
The fundamental process of ionization in the collisions of protons with atomic hydrogen is considered at an impact energy of 70 keV by comparing experimental and theoretical doubly differential cross sections for electron ejection. This collision system provides a critical test of intermediate energy theories since effects such as electron-electron interaction (correlation) are not present and the roles of the ionization mechanism and subsequent evolution of the ejected electron in the two-centre Coulomb field are isolated. Results of the classical-trajectory Monte Carlo technique, the continuum distorted wave-eikonal initial state method and the plane wave Born approximation are compared with the present experimental data which are the first differential measurements that have been performed for the ionization of atomic hydrogen by proton impact.Keywords
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