Semiclassical treatment of two-center electron-electron interactions in energetic atomic collisions: Screening effects

S. Ricz, B. Sulik, N. Stolterfoht, I. Kdr

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The impact-parameter dependence of electronic screening effects is investigated within the framework of the time-dependent semiclassical perturbation theory concerning excitations. A multipole expansion is used for different screening potentials to determine time-dependent matrix elements which are suitable for first- or higher-order impact-parameter calculations. For numerical matrix elements, the present method provides a complete solution. Analytical formulas for 1s-2s and 1s-2p excitations are obtained by using hydrogenic wave functions. Our integrated cross sections are equivalent to those determined within the framework of the plane-wave Born approximation. It is shown that difficulties may arise in reproducing the present results by means of existing approximate factorization and scaling formulas.

Original languageEnglish
Pages (from-to)1930-1938
Number of pages9
JournalPhysical Review A
Volume47
Issue number3
DOIs
Publication statusPublished - Jan 1 1993

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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