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Figure 4
Determination of the ADR. (a) Experimental (symbols) and simulated (solid lines) back-diffraction profiles for photon-energy offsets of 1.0 and 4.4 meV. (b) Knife-edge scans used to determine the angular position of the back-diffracted beam. The beam centre was obtained from the derivative of the intensity profile. (c) Measured beam deviation as a function of photon-energy offset compared with predictions from the conventional DuMond analysis and the full dynamical calculations. |

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