Fig. 2: XRD induced radiation damage manifestation: second harmonic generation (SHG) versus backscatter imaging scanning electron microscopy (SEM-BEI).

a SHG image of irradiated pike bone. The SHG signal vanishes in sites where the beam impinges on the sample (black oval areas (n = 7 samples)). b SEM-BEI image of irradiated pike bone. The same imprints of damage in a appear brighter in the electron microscope (n = 2 samples). The scale bar is 100 μm.