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Figure 3
Instrumental resolution (dots: measured data; lines: modeled instrumental resolution function) at different sample-to-detector distances for the grazing-incidence geometry in (a) the vertical and (b) horizontal directions, obtained from measurements of CeO2 powder dispersed over a fused silica surface. Data were measured at a photon energy of ∼100 keV and recorded on a PerkinElmer XRD1621 detector. (c) Derived PDFs for the respective sample-to-detector distances [offset on G(r) axis, low-r range up to 4.2 Å magnified]. (d) Applied Qmax and instrumental parameters Qdamp and Qbroad from fits of the PDFs in (c) to the ICSD reference 72155 versus the distance between sample and detector.

IUCrJ
Volume 6| Part 2| March 2019| Pages 290-298
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519000514