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Reflection-peak intensity fit. (a) Enlargement of the reflection-image sum {(2, 11)} of Fig. 9 ▸(i). The dashed white lines are contour levels of the fitted Gaussian peak function. The magenta ellipse is the integration area, with the semi-axes defined after modelling the width behaviour. (b, c) Horizontal and vertical sections through the red dotted lines in (a). The blue points and cyan lines are the experimental data and the Gaussian fit.
