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The quantitative interpretation of energy and angle resolved low-energy ion scattering and intensity distributions is achieved by comparing the experimental results with those from numerical simulations using the MARLOWE code with extensions for layer selective analysis. The example used is the CuAu(1 0 0) alloy crystal surface. For adequate analysis the potential parameter (i.e. the screening length) has to be calibrated. This is done by using elemental single crystal standards. Anisotropic thermal vibrations are taken into account in correspondence with published Debye temperature values. Neutralization effects are found to be of minor importance for Na+ and He+ scattering from CuAu. A quantitative analysis of the first and second layer composition of CuAu(1 0 0) as a function of temperature could thus be obtained, the results being in good agreement with theoretical predictions.

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Authors: BEIKLER R, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching (DE);TAGLAUER E, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching (DE)
Bibliographic Reference: An article published in: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 193, Issues 1-4, June 2002, Pages 455-45
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Record Number: 200215348 / Last updated on: 2002-10-23
Original language: en
Available languages: en