Liquid Water: Scattering of X-Rays
The long-range periodicity of a crystal lattice is not a necessary requirement for the production of diffraction effects. Even in a dilute polyatomic gas the interference between waves scattered from different atoms within a molecule is sufficient to produce a characteristic diffraction pattern from which the molecular structure can be deduced. The short-range positional and orientational correlation between molecules, negligible in the gas phase, is sufficient in a liquid to cause additional interference effects between waves scattered from atoms in different molecules. The diffraction pattern of a liquid contains information about these correlations.
KeywordsLiquid Water Radial Distribution Function Compton Scattering Pair Correlation Function Positional Correlation
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