TITLE

Dynamic displacement of N[sub 2] from Ru(0001) by incident D and H atoms

AUTHOR(S)
Diekho¨ner, L.; Mortensen, H.; Åkerlund, C.; Baurichter, A.; Luntz, A. C.
PUB. DATE
March 2001
SOURCE
Journal of Chemical Physics;3/1/2001, Vol. 114 Issue 9
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Exposing a N[sub 2] covered Ru(0001) surface to a D or H atom beam leads to desorption of the N[sub 2] molecules. This displacement is kinetically prompt at all N[sub 2] coverages and the process is identified as dynamic displacement. By showing that the cross section for displacement by D atoms is roughly twice that for H atoms, we suggest that the mechanism for this dynamic displacement is some phonon mediated process rather than an electronically nonadiabatic one suggested earlier. As a contrast, the displacement of Xe adsorbed on Pt(111) induced by CO adsorption has also been measured. In this case, the displacement is not prompt and there is a total coverage on the surface that is necessary to induce desorption of Xe. This seems well described by a thermodynamic displacement mechanism. © 2001 American Institute of Physics.
ACCESSION #
4713972

 

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