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Figure 3
Powder pattern from diamond powder in a 0.2 mm-diameter glass capillary obtained using an all-in-vacuum diffractometer equipped with a curved IP strip as detector. The wavelength was 0.20687 Å. The red curve is from an empty glass capillary, and the black curve is the calculated Compton scattering from the diamond powder as explained in the main text. The sum of the red and black curves then amounts to the background below the Bragg peaks as shown in green. Note that a typical peak level of Bragg peaks at large angles is around 2500 counts, so the signal-to-background ratio is around 1:10 at these angles. The exposure time was 60 min. The data set can be found as supporting information, available from the IUCr electronic archives (Reference: GB5017 ).

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