Effective pade Hamiltonian operator and its application for treatment of H216O rotational spectrum in the ground state

Abstract Both microwave and infrared data on frequencies of rotational transitions in the H 2 16 O ground state are fitted for the first time within the limits of experimental errors. This fitting is based on a representation of the effective rotational Hamiltonian operator in the form of a Pade operator. New experimental data on frequencies of microwave transitions in the submillimeter wave region are obtained.