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Figure 4
The diffuse scattering data measured by GIXOS at Qxy|β=0 = 0.03 Å−1 (see Fig. 2 caption) and the pseudo-reflectivity data derived from it, from the water surface (a) and from the surface of the mixture of water with 10 vol% ethanol (b). The blue circles (with error bars) show Rpseudo = R*/r (top) and Rpseudo/RF (bottom) along with the simulated R/RF predicted by the CWM (solid blue lines, see text). The green circles correspond to the normalized diffuse scattering, R*/R0*, where R0* = [ = [| t\left(\alpha \right) |^2\rho _{{\rm b},\infty }^2k_{\rm B}T{\Delta}\beta {\Delta}2\theta ] / [\sin( \alpha)\, \gamma Q_{xy}^2]] is the Qz-independent pre-factor of R* [equation (6)[link]]. The normalized diffuse scattering follows R/RF with a smaller r.m.s. roughness predicted by the CWM (green dashed line, see text).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 3| June 2024| Pages 714-727
https://doi.org/10.1107/S1600576724002887
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