Figure 2
Plots of the distributions of diffraction intensities of disordered crystals with P212121 symmetry with a mean of Σ = 10 for continuously distributed values (lines) and for photon counting (dots). (a) Linear and (b) logarithmic plots of p(I; 4), p(I; 3, 1), p(I; 2) and p(I; 1), all without background, corresponding to the distributions for acentric continuous diffraction intensities, partly centric continuous diffraction intensities, centric continuous diffraction intensities (on central sections normal to crystallographic twofold axes) and acentric Bragg intensities, respectively. (c) Linear and (d) logarithmic plots of the `noisy Wilson' distributions for the same cases with a background of μ = 6 and σ = 2.45. The dashed vertical lines correspond to the value of the mean signal, Σ, in parts (a) and (b), and the mean background, μ, and background plus signal, μ + Σ, in parts (c) and (d). |