Optical and dielectric functions of liquid H2O and D2O at 25 °C were obtained in the 2–9.2 eV region of photon energy. The reflectance was measured for several angles of incidence at a liquid–semicylindrical-window interface. The refractive index n and absorption coefficient k were obtained by a least-squares fit of calculated to experimental reflectance. The principle difference observed was the contraction of the D2O spectra due to the mass effect of the heavier isotope.
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Heller et al. (1977) studied this question.
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