Abstract
We have measured 4f core-level shifts and surface-to-bulk intensity ratios for surface atoms on the Au(111), (100) and (110) faces. These shifts show crystallographic dependences as well as dependences on surface reconstruction. For the reconstructed Au(110)-(2x1) surface, our data are consistent with a relaxed missing row model and exclude an unrelaxed missing row model. The Au(100)-(5x20) reconstructed surface gives surface core-level shifts and intensity ratios which are consistent with a buckled hexagonal overlayer model with surface relaxation.
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