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Figure 1
Geometry of GISAXS experiments. A monochromatic X-ray beam with a wavevector [{\bf{k}}_{\rm{i}}] impinges on the sample surface at a grazing-incidence angle [\alpha_{\rm{i}}]. The elastically scattered wavevector [{\bf{k}}_{\rm{f}}] propagates along the exit angle [\alpha_{\rm{f}}] and the azimuthal angle [\theta_{\rm{f}}]. The sample can be rotated around the z-axis by the angle φ.

IUCrJ
Volume 4| Part 4| July 2017| Pages 431-438
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517006297