Resonance line shapes for He diffraction and determination of surface profile for Ni(110) + (1 × 2)H

The resonance line shapes in the specular intensity for He diffraction from Ni(110)+ H(1 × 2) are calculated using a hard corrugated surface model with a well, and compared with experimental results. It is shown that the asymmetry of the resonance lines can be used to resolve the ambiguity whether the corrugation function +D(x, y) or -D(x, y) describes the surface profile. © 1981.