The THz Spectrum of Density Fluctuations of Water: The Viscoelastic Regime

Figure 2

The dispersion curves of the low frequency (red dots) and high frequency (blue dots) modes in the spectrum of D₂O are reported as measured by INS in [24] and [25], respectively. The boundaries of the range accessible by the two INS measurements are represented by the dashed parabolas of corresponding colors. Open red and blue dots represent, respectively, the dispersion of the low and the high frequency modes, as determined by the MD computation of Rahman and Stillinger [15].