Calculation for Stretching Vibrational Spectrum of D₂O by Nonlinear Quantum Theory

The stretching vibrational energy spectra of D₂O in both vapour and liquid phases are calculated until total quantumnu mber n=9 using the discrete self-trapping equation in nonlinear quantum theory.Many interesting features of vibrational energy spectrum of D₂O have been obtained from the calculated results,which are very useful in studying the behaviour of D₂O under high pressure condition.