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Figure 4
Simulated small-angle scattering curves (upper row) and corresponding PDDFs (bottom row) of a monodisperse system with a particle radius of 20 Å for different X-ray sources. (a), (d) Monochromatic light with different wavelengths (0.25 Å, 0.5 Å and 1.0 Å). Curves are plotted as a function of q0, i.e. the q-values expected for the reference wavelength. (b), (e) Gaussian spectra (solid lines) with bandwidths of 10%, 25% and 50%, half-Gaussian spectra (dotted lines) with bandwidths of 5%, 12.5% and 25%, and an ideal monochromatic light source (black line). The reference wavelengths are all 0.5 Å. (c), (f) Undulator light sources, APS U33 and U18, at different undulator gaps. Calculations use a full spectrum (solid line) and the first harmonic (dashed line) for each case except U18G20 and U18G30. Inset in (f): PDDFs calculated with the full spectra of U33G11 and U33G20.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 2| March 2018| Pages 496-504
https://doi.org/10.1107/S1600577517018355
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