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Figure 4
A sequence of X-ray spectrograph images similar to that in Fig. 3[link](b) but taken here with spectral resolution probe C440 in the beam and angular deviation Θ from the exact Bragg back reflection being changed incrementally. Inserts show examples of spectral profiles S(y, Θ) taken at selected angles Θ∞ = 4.91 mrad [inset (a)] and Θc = 9.26 mrad [inset (b)]. The Θ scale is centered at Θc = 9.259 mrad; this value corresponds to the notch in the middle of the spectral window of imaging [inset (b)]. The energy scale E − Ec = [y/G^{\,{\rm{(exp)}}}] is obtained using the linear dispersion rate [G^{\,\rm{(exp)}}] derived from these images as detailed in the discussion of Fig. 5[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 4| July 2025| Pages 861-872
https://doi.org/10.1107/S1600577525004278
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