Two-center electron emission in collisions of fast, highly charged ions with He: Experiment and theory
- Hahn-Meitner-Institut Berlin GmbH, Bereich Festkoerperphysik, Glienickerstrasse 100, D-14109 Berlin (Germany)
- Institute of Nuclear Research of the Hungarian Academy of Science (ATOMKI), P.O. Box 51, H-4001 Debreccen (Hungary)
- Laboratoire de Chemie-Physique Matiere et Rayonnemnent, Universite Pierre et Marie Curie, 11 Rue Pierre et Marie Curie, 75231 Paris (France)
- Laboratoire des Collisions Atomiques, CNRS and Universite de Bordeaux, I, 351 Cours de la Liberation, F-33405 Talence (France)
Electron emission cross sections differential in energy and angle of the ejected electrons were measured in collisions of 5-MeV/{ital u} C{sup 6+}, O{sup 8+}, and Ne{sup 10+} ions on He. The experimental results deviate substantially from calculations based on the plane-wave Born approximation indicating that the ejected electrons are significantly affected by the two-center field of the target and projectile ion. The two-center effects were confirmed by comparison with results from the continuum-distorted-wave--eikonal-initial-state (CDW-EIS) approximation that has recently been improved by using Hartree-Fock-Slater wave functions for the ejected electrons. It is shown for nearly complete energy and angular ranges that the improved CDW-EIS method predicts cross sections in excellent agreement with experiment.
- OSTI ID:
- 132897
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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