Abstract

We report fully differential cross sections (FDCS) for the single ionization of helium by a 75 keV incident energy proton. Previous three-body distorted wave (3DW) calculations for this collision system are in poor agreement with the absolute magnitude of the experimental measurements. The 3DW approximation treats the four-body problem as an effective three-body problem in which the passive electron does not participate in the collision. We have developed a full four-body approach in which the passive electron fully participates in the collision. It will be shown that the FDCS is very sensitive to the treatment of the passive electron-ejected electron interaction. Results of our full four-body approach will be compared with recent absolute experimental measurements.

Department(s)

Physics

Keywords and Phrases

Atom-Ion Collisions; Electron Correlations; Helium Neutral Atoms; Hydrogen Ions; Ionisation; Positive Ions

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2005 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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