Abstract

We present a systematic study of atomic four-body fragmentation dynamics. To this end we have measured a variety of multiple differential double ionization cross sections for 6 MeV p+He collisions. The data are compared to a first-order calculation with correlated electrons and to a simulation representing a second-order process, with some experimental results seemingly in favor of the first, others in agreement with the second approach. This apparent conflict can be resolved by accounting for elastic scattering between the projectile and one electron already promoted to the continuum through electron-electron correlation in the first-order process.

Department(s)

Physics

Sponsor(s)

German Research Association
Helmholtz Alliance
National Science Foundation (U.S.)

Keywords and Phrases

Electron Correlations; Electron Impact Ionisation; Helium Neutral Atoms; Electron-atom collisions

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2009 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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