Abstract
Ionization cross sections for the four combinations of electrons and positrons on H and He+ have been calculated at energies near the threshold for ionization using the classical trajectory Monte Carlo method. In addition, charge-exchange (positronium formation) cross sections have been calculated for the positron-impact collisions. The ionization cross sections compare well with the predictions of the Wannier and Klar models and experimental observations. Our results indicate that the Wannier-type threshold behavior may extend to higher energies than was previously thought. In addition, we have calculated two of the collision parameters, the angle and the relative separation between the escaping particles, used in the Wannier and Klar models, and find good agreement with the values predicted by these theories. © 1986 The American Physical Society.
Recommended Citation
A. E. Wetmore and R. E. Olson, "Ionization Of H And He+ By Electrons And Positrons Colliding At Near-threshold Energies," Physical Review A, vol. 34, no. 4, pp. 2822 - 2829, American Physical Society, Jan 1986.
The definitive version is available at https://doi.org/10.1103/PhysRevA.34.2822
Department(s)
Physics
International Standard Serial Number (ISSN)
1050-2947
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 American Physical Society, All rights reserved.
Publication Date
01 Jan 1986
