Title

Role of the Ground State in Electron-Atom Double Ionization

Abstract

Recently, absolute measurements have been reported for double ionization of helium by 5.6 keV electron-impact. At this high energy, one would think that the first Born approximation for the interaction of the projectile with the atom would be valid. However, on the basis of a lowest-order implementation of a Faddeev-type approach, Berakdar concluded that the approximation was not valid. Here we argue that (i) it is valid at this energy and (ii) the previous discrepancy between calculations in the first Born approximation and the overall magnitude of the measurements was due to a poor description of the ground state.

Department(s)

Physics

Keywords and Phrases

Coulomb blockade; Electrons; Ground state; Hamiltonians; Helium; Ionization of gases; Perturbation techniques; Double ionization; High energy physics

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2003 American Physical Society (APS), All rights reserved.

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