The Contribution of Fermi Resonance to the Formation of the Raman Valence Band of Water

摘要

We study the role of Fermi resonance in the formation of the valence band of Raman scattering of light by liquid water molecules. We experimentally study the Raman valence and bending bands of water under changes in temperature from 20 to 99 deg C and in concentrations of D_(2)O and KI, KBr, KCl and KF salts in the range of their full solubility. We propose and implement a method for calculating the interaction constant of Fermi resonance in water. Use of genetic algorithms together with variational methods has made it possible to increase the accuracy in calculating the interaction constant of Fermi resonance and for the first time to quantitatively estimate the contribution of resonance and the intensity of the Raman valence band of water.