Abstract
The eikonal approach to electron capture developed in earlier publications is analyzed with respect to its physical content using the Born series as a reference expansion. In the language of perturbation theory, the eikonal approach describes a close collision between electron and projectile followed by multiple distant collisions between electron and target nucleus. The distant encounters have a large weight in phase space and therefore dominate capture at intermediate energies. The post-prior discrepancy is shown to be fairly small for nonresonant 1s-1s capture.
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On leave from Hahn-Meitner Institut für Kernforschung Berlin, Bereich Kern- und Strahlenphysik und Fachbereich Physik, Freie Universität Berlin, D-1000 Berlin 39, Germany
One of the authors (J.E.) wants to express his gratitude for the cordial hospitality extended to him at the Department of Physics, Hiroshima University. He gratefully acknowledges the support by the Japan Society for the Promotion of Science.
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Eichler, J., Narumi, H. On the classical-trajectory eikonal approximation for electron capture into multicharged ions. Z Physik A 295, 209–214 (1980). https://doi.org/10.1007/BF01412199
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DOI: https://doi.org/10.1007/BF01412199