Charge Transfer and Kinetic Energy Gain in Collisions of Highly Charged Ions with Conducting and Insulating Surfaces

J. Ducré
Univ. of Muenster, Germany

U. Thumm
J.R. Macdonald Lab., Dept. of Physics, Kansas State University

Abstract

We have extended the classical over-barrier model [1] to simulate the neutralization dynamics of highly charged ions interacting under grazing incidence with conducting and insulating surfaces. Our calculations [2] are based on simple model rates for resonant and Auger transitions. We include effects caused by the dielectric response of the target and, for insulators, localized surface charges. Characteristic deviations regarding the charge transfer processes from conducting and insulating targets to the ion are discussed. We find good agreement with previously published experimental data for the image energy gain of a variety of highly charged ions impinging on Au, Al, LiF and KI crystals.

[1] J. Burgdoerfer, in Review of Fundamental Processes and Applications of Atoms and Ions, C.D. Lin (ed.) (World Scientific, Singapore, 1993).
[2] J. Ducré, F. Casali, U. Thumm, Phys. Rev. A 57, 338 (1998).

Supported by the Division of Chemical Sciences, Basic Energy Sciences, Office of Energy Sciences, US. DOE

Submitted to the APS Centennial Meeting/DAMOP, Atlanta, GA in March 1999

 

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