A new approach to the treatment of rotational spectra of molecules with small moments of inertia applied to the PH3 molecule in the ground state
1981
Abstract A new approach to the treatment of rotational spectra of molecules with small moments of inertia is considered based on a representation of the effective rotational Hamiltonian operator in the form of a Pade operator. An extended set of high-precision data on transition frequencies in the rotational spectrum of the PH 3 molecule in the ground vibrational state is analyzed. The fitting of these data within experimental error demonstrates the advantages of the new approach. Frequencies of the Q -branch forbidden transitions | K | = 3 ← 6, first measured in this work, represent an essential part of the data under consideration.
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