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Surface analysis with grazing incidence fast atom diffraction (GIFAD)

Abstract : Grazing collisions at surfaces offer rather contrasted conditions. For well ordered flat surfaces, the scattering is spread among several lattice sites, each of which produces only a tiny elementary deflection. If, in addition, the atomic projectile is aligned along a crystallographic direction, the surface appears as made of parallel furrows or as a washboard which act as a diffraction grating for the atomic wave. We will show that the analysis of characteristic diffraction pattern recorded on a position sensitive detector located downstream allows a sensitive measure of the shape of the surface electronic density. A modified Debye Waller factor is proposed to explain the observed diffraction signal.
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https://hal-cea.archives-ouvertes.fr/cea-00358934
Contributor : Chantal Brassy <>
Submitted on : Wednesday, February 4, 2009 - 8:46:02 PM
Last modification on : Wednesday, October 14, 2020 - 4:15:49 AM

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  • HAL Id : cea-00358934, version 1

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Patrick Rousseau, Hocine Khemliche, Nenad Bundaleski, Pierre Soulisse, Anouchah Momeni, et al.. Surface analysis with grazing incidence fast atom diffraction (GIFAD). Journal of Physics: Conference Series, IOP Publishing, 2008, 133, pp.012013. ⟨cea-00358934⟩

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