Abstract
The method of calculation of ro-vibronic (RV) intensities of high-resolution absorption spectra of the free molecules on the base of nonrelativistic hamiltonian in the principal axes of inertia is proposed. Detailed expression of transition strength (TS) caused by arbitrary rank irreducible tensor operator is obtained. Successive parametrization procedure of the tensor operator matrix elements is carried out. The method in question is generalized for the case of any number of interecting vibrational states. The results of calculations for vibration-rotation line intensities of water vapor molecule are given.
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