Neutron diffraction study of light and heavy water mixtures at 25 °C

Neutron diffraction data of very high statistical accuracy for four mixtures of light and heavy water containing 0.01%, 35.79%, 67.89%, and 99.75% deuterium are presented. The dynamic corrections described in a preceding article yielded a self-consistent static coherent structure function for heavy water. For the other mixtures an empirical correction method was used. The four total structure functions were analyzed to yield the three partial structure functions aOO(k), aOH(k), and aHH(k). The function aOO(k) is not significantly different from previously obtained x-ray diffraction results. The partial structure functions for hydrogen interactions will provide a sensitive test for proposed models of liquid water.