> We don't see any change of frequency (or wavelength) in the majority > of the scattering from disordered regions so it's Rayleigh (coherent) > scattering. There will be a small amount of Compton (incoherent) > scattering resulting from the ionisation events which are responsible > for radiation damage but hopefully freezing will keep this to a > minimum.
Sorry just re-read that & realised the bit about freezing is not quite what I meant! Freezing will not of course reduce the amount of incoherent scattering in the least. It may however alleviate its effects (which is what I meant). Cheers -- Ian
