Spectra of Water Surfaces (IMAGE) RIKEN Caption This figure shows the imaginary part of second order nonlinear susceptibility spectra of water surfaces: (a) Experimental HOD (blue line), (b) simulated HOD (red). The concentration of isotopes is H2O : HOD : D2O = 1: 6: 9. Credit RIKEN Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.