[en] The quasielastic scattering peak in light water at room temperature has been studied with neutrons of energy ∼ 5x10^-3 eV. The width and shape of the peak has been determined by the time-of-flight technique at two scattering angles. If it is assumed that the broad inelastic spectrum is due to scattering by a monoatomic gas of mass 18, it is found that the quasielastic scattering is in good agreement with the predictions by the continuous diffusion model. Inelastic spectra were recorded up to 13x10^-3 eV. Indications of two discrete energy transfers (8 and 14x10^-4 eV) are observed in the 90 deg run. The results are discussed and compared with earlier observations