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Figure 2
(a) Calculated reflection-mode EXAFS spectra for a polycrystalline gold sample at the Au L3-edge and a grazing angle Θ = 0.2° for different surface r.m.s. roughness values σ, as indicated. The magnitude of the Fourier transforms (FTs) of the k3-weighted reflectivity fine structures extracted from these spectra are compared in (b) |FT[χR(k)k3]| and (c) |FT[ΔR(k)k3]|, respectively. Black line: Fresnel reflectivity (σ = 0 Å). Red line: σ = 5 Å. Blue line: σ = 10 Å. Purple line: σ = 20 Å. The insets show the behaviour of the FT in the vicinity of the nearest-neighbour peak in more detail. The data are not corrected for phase shifts; k-range for the FT: 4.5 Å−1 < k < 12.5 Å−1.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 16| Part 4| May 2009| Pages 443-454
doi:10.1107/S0909049509015684
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