> 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
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