Initial-state correlation effects in low-energy proton impact ionization

M. Foster, J. L. Peacher, A. Hasan, M. Schulz, D. H. Madison

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we will report on fully differential cross sections (FDCS) for single ionization of helium by 75 keV proton impact for fixed ejected electron energies and different momentum transfers. These measurements show major discrepancies in the absolute magnitude between experiment and the theoretical, 3DW (three-distorted-wave) model. The 3DW model treats the collision as a three-body process (projectile, ion, ejected electron), and for the scattering plane it has accurately predicted the FDCS for higher energy C6+ impact ionization of helium. The lack of agreement between the 3DW model and experiment for low energy collisions suggests that a threebody model may not be appropriate for lower collision energies. We will present a four-body model that includes full initial-state correlation.

Original languageEnglish
Title of host publicationProceedings of the International Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions
Pages7-11
Number of pages5
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions - Buenos Aires, Argentina
Duration: Jul 28 2005Jul 30 2005

Publication series

NameAIP Conference Proceedings
Volume811
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions
Country/TerritoryArgentina
CityBuenos Aires
Period7/28/057/30/05

Keywords

  • Ground states
  • Helium neutral atoms
  • Ion-atom collisions
  • Ionization
  • Wave functions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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