A reinvestigation of the Raman spectrum of water

The Raman spectrum of liquid water has been reinvestigated using a technique which automatically records the depolarization ratio along with the polarized Raman spectrum. The exceptionally accurate depolarization ratios thus obtained, as well as the isotropic and the anisotropic spectra of water, indicate that the libration region extends to higher frequencies than previously thought and that a new polarized band originating from restricted translation occurs near 290 cm−1. The translational spectrum is in good agreement with that calculated by Weres and Rice.