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Xe monolayer adsorption on Ag(111) I. Structural properties
Authors:P.I. Cohen  J. Unguris  M.B. Webb
Affiliation:Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA
Abstract:The monolayer of adsorbed xenon on the (
/></figure>1) surface of silver was studied using low- energy electron diffraction. The structure is an hexagonal lattice aligned with but out of registry with the substrate. The Xe-Xe spacing at 25 K is 4.44 ± 0.01 Å in the full monolayer and 4.47 ± at less than full coverage. The Xe-Ag spacing is 3.5 ± 0.1 Å. Here <math><mtext>〈u</mtext><msub><mi></mi><mn>⊥</mn></msub><mtext>〉</mtext><msup><mi></mi><mn>2</mn></msup><mtext>T</mtext></math>, the meansquare vibrational amplitude normal to the surface divided by the temperature is (1.83 ± 0.4 × 10<sup>?4</sup> A<sup>2</sup>/K. The heat of adsorption is 0.28 ± 0.03 eV/atom.</td>
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