Influence of electronic exchange on single and multiple processes in collisions between bare ions and noble-gas atoms

T. Kirchner, L. Gulyás, H. J. Lüdde, E. Engel, R. M. Dreizler

Research output: Contribution to journalArticle

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Abstract

The time-dependent many-electron problem encountered in the theory of energetic ion-atom collisions can be approached systematically within an effective single-particle picture, based, e.g., on the time-dependent density functional theory. In the present contribution we investigate ionization and electron loss from the target for the collision systems p, p̄, He2+ + Ne, and p + Ar in the energy range 10 keV/amu-1 MeV/amu. The results presented are based on a static approximation to the exchange-correlation contribution of the effective potential. The corresponding time-dependent single-particle equations are solved with the continuum distorted-wave with eikonal initial-state approximation and the basis generator method, a coupled-channel approach in terms of structurally adapted basis functions. We demonstrate that in either case the results depend strongly on the explicit form of the local static exchange potential. An orbital-dependent analysis of electron removal in He2+ + Ne collisions shows that the quality of the exchange potential is decisive for the suppression of artificial reaction channels.

Original languageEnglish
Pages (from-to)2063-2076
Number of pages14
JournalPhysical Review A
Volume58
Issue number3
Publication statusPublished - Sep 1998

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rare gases
collisions
electronics
atoms
ions
electrons
approximation
generators
retarding
density functional theory
continuums
ionization
orbitals
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Influence of electronic exchange on single and multiple processes in collisions between bare ions and noble-gas atoms. / Kirchner, T.; Gulyás, L.; Lüdde, H. J.; Engel, E.; Dreizler, R. M.

In: Physical Review A, Vol. 58, No. 3, 09.1998, p. 2063-2076.

Research output: Contribution to journalArticle

Kirchner, T. ; Gulyás, L. ; Lüdde, H. J. ; Engel, E. ; Dreizler, R. M. / Influence of electronic exchange on single and multiple processes in collisions between bare ions and noble-gas atoms. In: Physical Review A. 1998 ; Vol. 58, No. 3. pp. 2063-2076.
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