**Figure 4**
The relative FWHM determined from a Gaussian fit to the experimental RSM data in (*a*) the *q*_{y} direction, with initial FWHM values for crystals 1 to 6 of 0.08°, 0.06°, 0.15°, 0.09°, 0.11° and 0.12°, respectively, (*b*) the *q*_{z} direction, with initial FWHM values for crystals 1 to 6 of 0.09°, 0.19°, 0.11°, 0.08°, 0.12° and 0.06°, respectively, and (*c*) the *q*_{x} direction, with initial FWHM values for crystals 1 to 6 of 0.12°, 0.16°, 0.25°, 0.10°, 0.23° and 0.06°, respectively. (*d*) The relative volume expansion of the 3D RSM calculated as the total number of non-zero counts in the 3D array containing the Bragg reflection with initial RSM volumes for crystals 1 to 6 of 1838, 864, 2569, 3217, 1198 and 1005 µm^{3}, respectively. The dose rate determined from *RADDOSE-3D* was 0.42 MGy s^{−1}. |