Abstract

The diffraction intensities from a corrugated hard wall are shown to be the same for a given corrugation function ζ( x, y) and − ζ(− x, − y), provided that coupling to evanescent waves is negligible. To illustrate the consequences of this ambiguity for both surface structure and surface bonding, the corrugation of the adsorbate system Ni(110) + H(1 × 2) determined from Hediffraction measurements is considered. Possible conditions under which the ambiguity could be resolved are discussed.

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