Ionization of atomic hydrogen by positron impact
- 26 February 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 64 (9) , 1019-1022
- https://doi.org/10.1103/physrevlett.64.1019
Abstract
In a crossed-beam experiment the angle-integrated ionization cross section for both positron and electron impact on atomic hydrogen (excluding positronium formation) has been measured in the energy region of 17.5 to 600 eV. Below 450 eV the positron cross section is larger than the electron one, at 50 eV by about a factor of 2. Absolute cross sections are obtained by comparing the electron data with literature values. At energies above 30 eV all theoretical predictions lie below our measured cross sections for positron-impact ionization.Keywords
This publication has 16 references indexed in Scilit:
- Ionisation from the ground state of atomic hydrogen by positron impactJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Differential Elastic Scattering of Positrons from Argon Atoms at Low EnergiesPhysical Review Letters, 1988
- Positron Differential Elastic-Scattering Cross-Section Measurements for ArgonPhysical Review Letters, 1986
- Ionization of H andby electrons and positrons colliding at near-threshold energiesPhysical Review A, 1986
- Classical-trajectory Monte Carlo calculation for collision processes ofe++(e−p) andμ++(μ−p)Physical Review A, 1985
- Positron-impact ionization of hydrogen atomsCanadian Journal of Physics, 1985
- Radio frequency atomic hydrogen beam sourceReview of Scientific Instruments, 1981
- Ionization ofnear ThresholdPhysical Review B, 1968
- Cross Sections for Dissociative Ionization of Molecules by Electron ImpactThe Journal of Chemical Physics, 1965
- Collisions of Electrons with Hydrogen Atoms. I. IonizationPhysical Review B, 1958