Third-Order Pseudostate Calculation Of Excitation-Ionization Of Helium By Protons And Antiprotons

Authors

Jack C. Straton, Portland State UniversityFollow
J. WangFollow
James H. McGuire, Tulane UniversityFollow
L. Nagy

Published In

Canadian Journal of Physics

Document Type

Citation

Publication Date

1996

Abstract

Techniques the authors developed to include correlation in the double-excitation of atoms are applied to a second two-electron process, excitation–ionization by proton versus antiproton impact. The second-order cross section, in the closure approximation and using pseudostates for the unbound electron, reproduces only a small percentage of the experimental factor of 2 difference for positively versus negatively charged projectiles. Inclusion of a portion of the third-order term yields a significant contribution near 0.5 MeV.

Locate the Document

https://doi.org/10.1139/p96-081

DOI

10.1139/p96-081

Persistent Identifier

https://archives.pdx.edu/ds/psu/25903

Citation Details

Straton, J. C., Wang, J., McGuire, J. H., & Nagy, L. (1996). Third-order pseudostate calculation of excitation–ionization by protons and antiprotons. Canadian journal of physics, 74(7-8), 554-558.