THE PHASE-SPACE MOMENT METHOD FOR STUDYING INTRAMOLECULAR VIBRATIONAL-ENERGY REDISTRIBUTION

The phase space moment method first introduced by Turner is used to calculate the harmonic energy of the molecular oscillator model defined in this paper and then used to study intramolecular vibrational energy transfer processes. The results obtained approach the exact results when the anharmonicities of oscillators and the couplings between modes are small. However, the computational time needed in the moment method is at least one order of magnitude smaller than that in the exact method. The moment method may be applicable to larger molecular vibrational model systems.