Heidelberg 1999 – wissenschaftliches Programm
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A: Atomphysik
A 14: Poster
A 14.33: Poster
Donnerstag, 18. März 1999, 16:30–19:00, PY
Broadening of hydrogenic levels near thin metallic films — •Uwe Thumm1, Peter Kuerpick2, and Uwe Wille3 — 1J.R. Macdonald Laboratory, Kansas State University, Manhattan, KS 66506 — 2SAP, Neurottstr. 16, D-69190 Walldorf — 3Bereich Theoretische Physik, Hahn–Meitner Institute, D-14091 Berlin
We evaluated the width of resonantly broadened hydrogenic
levels in the vicinity of thin metallic films in first–order
perturbation theory. We calculate the electronic states of the
film as eigenstates of a Jennings-type (LDA) potential.
In order to include hybridization effects, we represent
the hydrogenic levels in a parabolic (Stark) basis.
The widths show characteristic, sawtooth shaped, oscillations
as the film thickness is varied between 0.5 and 3 nm. These
oscillations are related to threshold effects in the onset
of resonant capture into a particular hydrogenic level.
We analyze the influence of these quantum size effects on
measurable parameters, such as electron capture probabilities
of slow incident hydrogenic ions.