Abstract
Measurements of the intensity of the specular beam as a function of angle of incidence for He diffraction from the missing-row reconstructed ( and thus highly corrugated) Pt(110)-(1\ifmmode\times\else\texttimes\fi{}2) surface were performed with several different He-beam energies. From the angular location of resonant structures four bound-state resonances with binding energies ${\mathit{E}}_{\mathit{i}}$ (i=0,1,2,3) of -7.35, -5.0,-3.0, and -1.15 meV (respectively) could be identified. Fitting these values to different analytical potential forms yields a potential-well depth D=8.7 meV. Depth and shape of the potential are discussed in connection with other hitherto available data of He-interaction potentials with metals.
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