Abstract
An overview is given about the electron emission when slow highly-charged ions interact with metal surfaces. Various processes are considered starting with the formation of the hollow atom above the surface until its final decay a few layers below the surface. In this context selected experimental data of the last few years are presented and theoretical results like from the classical over-the-barrier model and transport calculations are discussed. The instant of the K-Auger transition of the hollow atom is a main aspect of the present paper. It is shown that this process takes place almost only below the surface.
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