Quantum mechanical investigation of vibrational energy transfer in O(3P)+H2O collisions

Cross sections for the vibrational excitation of H2O in collision with O(3P) are calculated for relative collision energies of 0.5 to 3.0 eV by the vibrational close-coupling rotational infinite order sudden method using an accurate potential energy surface. The excitation cross sections obtained by this quantum mechanical calculation are compared to results of a recently published quasiclassical trajectory study which used the same potential surface. Very large differences between the quantum mechanical and classical trajectory results are found