Vibration–rotation interaction potential for H2O–A system

Abstract The contact transformation method is used to derive an effective interaction potential for H 2 O–A system. The expressions for the second order vibrational and rotational correction terms are obtained. The contributions of the third order, which take into account the Coriolis and Fermi resonances in H 2 O molecule, are obtained too. The matrix elements of a transformed interaction potential that are necessary for calculating the broadening parameters of H 2 O lines perturbed by mono-atomic gases are presented.

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