Mainz 1997 – wissenschaftliches Programm
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A: Atomphysik
A 27: Stöße V
A 27.3: Vortrag
Donnerstag, 6. März 1997, 16:30–16:45, P104
Close-coupling calculations for hydrogenic ions interacting with a metal surface — •P. Kürpick1, U. Thumm1, and U. Wille2 — 1J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2601, USA — 2Bereich Theoretische Physik, Hahn-Meitner-Institut Berlin, D-14091 Berlin, Germany
The time-dependent close-coupling equation for the ion–jellium-surface system is solved both by means of a fixed-ion self-energy formalism[1-3] and by direct integration. The self-energies yield non-perturbative level shifts and widths, as well as information about the formation of hybrid orbitals in the combined potentials of ion and surface. Convergence of the self-energy results is achieved within a small set of discrete hydrogenic basis functions centered on the ion. In general, the calculated level shifts and widths are in good agreement with the results of other theoretical approaches. The direct time integration is applied to the dynamics of hollow-atom formation in surface interactions of highly charged ions.
[1] J. Burgdörfer, E. Kupfer, H. Gabriel, Phys. Rev. A 36, 4963 (1987).
[2] P. Kürpick, U. Thumm, Phys. Rev. A 54, 1487 (1996).
[3] P. Kürpick, U. Thumm, U. Wille, (submitted for publication).
Supported by the Division of Chemical Sciences, Basic Energy Sciences, Office of Energy Research, U.S. Department of Energy and the Deutsche Forschungsgemeinschaft (DFG) through a postdoctoral grant for P.K.