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Figure 8
(a) Variation of speckle contrast with q. The insert shows the rescaled g2(q, τ) by removing 1 and dividing by the contrast at q = 3.1 × 10−3 nm−1. (b) Histograms of pixel intensities (counts) at q = 3.1 × 10−3 nm−1. Dashed lines are the fits to the Poisson–gamma distribution function [equation (5)[link]]. The sample is a dilute colloidal suspension of silica particles (600 nm in diameter) at rest, measured with different incident beam intensities. The measurements were performed using a larger beam that led to a maximum contrast of 0.315.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 31| Part 1| January 2024| Pages 65-76
https://doi.org/10.1107/S1600577523008627
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