The extended Q-range and low statistical noise of these measurements has significantly reduced truncation effects and related errors in the g(r) functions obtained. The oxygen-hydrogen contribution to the measured x-ray scattering pattern was subtracted using literature data to yield an experimental determination, with error bars, of the oxygen-oxygen pair-distribution function, g(r), which essentially describes the distribution of molecular centers. Sources of uncertainty from statistical noise, Q-range, Compton scattering, and self-scattering are discussed.
Each of these measurements represents a significant development of the x-ray diffraction technique applied to the study of liquid water. Four recent x-ray diffraction measurements of ambient liquid water are reviewed here.
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