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Figure 4
(a) The (13 3 3) Bragg reflectivity, (b) FWHM and (c) COM of the diamond crystal irradiated with 9 kW mm−2 X-rays in vacuum at 4 × 10−6 Torr. Red arrows and exposure time in (c) mark positions of the black irradiated spots visible in Fig. 3(e)[link]. The pronounced features at x = 1.1 mm are due to a crystal defect. (d) Bragg reflectivity as a function of photon energy measured at x = 0.05 in the spot irradiated for 1 h (data shown in red) and in the neighbouring not irradiated areas x = ±0.15 mm (blue and violet). Solid lines are Gaussian profiles fitted to the experimental data with the parameters provided in the text.

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