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Figure 1
Schematic diagrams of the experimental setup and geometry. (a) X-ray pulses (orange) exposing a solution of gold nanoparticles. Shown in bright green is the {111} Bragg ring. Also shown are two positions along the Bragg ring, [\phi_1] and [\phi_2], separated by an angle Δ = π. Artwork courtesy of Gregory M. Stewart (SLAC). (b) The elastic scattering geometry corresponding to the case when Δ = π. Note that ψmax < π at wide angles.

IUCrJ
Volume 3| Part 6| November 2016| Pages 420-429
ISSN: 2052-2525
https://doi.org/10.1107/S2052252516013956