A He-diffraction study of hydrogen chemisorption on Ni(113)

Analyses of He-diffraction intensities for clean Ni(113) and for the (1 × 1) phase of H yield the two-dimensional surface corrugation functions from which the approximate adsorption position of the H adatoms can be deduced: the shape of the corrugation hills of the H (1 × 1)-ordered phase as well as their amplitudes and widths indicate that the hydrogen prefers to occupy the threefold coordinated sites on the (111) microfacets instead of the competing fourfold sites on the (100) facets. © 1986.