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- W2083508498 abstract "The angular distribution of He atoms scattered from a randomly stepped surface differs in two aspects from a distribution obtained for a flat surface. The total yield in the specular beam is decreased due to diffuse scattering from the areas around the steps (1) and the angular distribution of the scattered atoms is broadened under anti-phase scattering conditions due to interference between scattering from terraces at different levels (2). Both these effects were used to investigate a Pt(111) surface on which steps were produced by high temperature sputtering. The angular distribution of the He atoms scattered in the specular beam is analysed with the facet model. A justification for applying this model is given. It is shown that any surface model with which the experimental angular distribution can be reproduced, may be applied to analyse the peak profile in terms of a step density. Determination of the step density demands correcting for a background (diffuse scattering) which introduces an uncertainty in the result of 5–10%. By comparing the step density obtained from this analysis with a total yield measurement, a cross section per unit length for diffuse scattering from a step edge D = 12 Å is found for 16 meV He atoms." @default.
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- W2083508498 date "1985-10-01" @default.
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- W2083508498 title "Investigation of a randomly stepped Pt(111) surface using thermal energy atom scattering (TEAS)" @default.
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- W2083508498 doi "https://doi.org/10.1016/0039-6028(85)90989-6" @default.
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