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The determination of shadowing critical angles in impact collision ion scattering spectroscopy

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Abstract

Critical angles for shadowing in low-energy ion scattering spectroscopy are calculated in the momentum approximation for the Thomas-Fermi-Molière potential and the Ziegler-Biersack-Littmark potential. In the relevant parameter range the results can be fitted by a formula containing five constants depending on the potential only. For a fixed projectile-target combination at a given energy the distance dependence of the critical angle is described by a simple power law. The comparison of the calculated results with experimental data shows that the inclusion of the effect of thermal vibrations on the critical angles improves the agreement between calculations and experiment significantly.

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Authors and Affiliations

  1. Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-8046, Garching bei München, Germany

    Th. Fauster, D. Hartwig & H. Dürr

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  1. Th. Fauster
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  2. D. Hartwig
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  3. H. Dürr
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Fauster, T., Hartwig, D. & Dürr, H. The determination of shadowing critical angles in impact collision ion scattering spectroscopy. Appl. Phys. A 45, 63–67 (1988). https://doi.org/10.1007/BF00618764

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