O adsorption and incipient oxidation of the Mg(0001) surface

First principles density functional calculations are used to study the early oxidation stages of the Mg(0001) surface for oxygen coverages 1/16 <= Theta <= 3 monolayers. It is found that at very low coverages O is incorporated below the topmost Mg layer in tetrahedral sites. At higher oxygen-load the binding in on-surface sites is increased but at one monolayer coverage the on-surface binding is still about 60 meV weaker than for subsurface sites. The subsurface octahedral sites are found to be unfavorable compared to subsurface tetrahedral sites and to on-surface sites. At higher coverages oxygen adsorbs both under the surface and up. Our calculations predict island formation and clustering of incorporated and adsorbed oxygen in agreement with previous calculations. The calculated configurations are compared with the angle-scanned x-ray photoelectron diffraction experiment to determine the geometrical structure of the oxidized Mg(0001) surface.Comment: 10 pages, 5 figure

Electron detachment from atomic negative ions

This paper presents an introductory overview of various aspects of electron detachment from negative ions with emphasis on recent data. A brief discussion about negative ions and their states is presented followed by a discussion on photodetachment, detachment by charged particles, atoms and molecules. A particular emphasis is made on low energy heavy particle collisions. An effort was made to delineate the role of different detachment channels and their importance relative to other possible processes

Neutralisation of positive ions on surfaces

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Neutralisation of positive ions on surfaces

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Electron transfer processes on Ag and Au clusters supported on TiO2(110) and cluster size effects

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Li ion neutralisation on Ag layers grown on Cu(111)

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Auger neutralization and energy losses and of ions on surfaces.

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Non-adiabatic effects in electron transfer during an atom-metal surface collision

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