Light and neutron scattering studies of the OH stretching band in liquid and supercritical water

The hydrogen projected OH stretching density of states has been determined by an inelastic neutron scattering experiment in liquid and supercritical water. The results, compared with new measurements of the isotropic Raman spectra at the same state conditions, support the interpretation of the Raman spectra in terms of superposition of the allowed ${\nu }_1$ band with the overtone of the ${\nu }_2$ band.