Isotopic shifts of vibrational-rotational lines of SO2
A.D. Bykov, B.A. Voronin
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: isotopic effect, isotopic shift, sulfur dioxide, vibrational-rotational spectra
Abstract
Simple isotopic relations relating the energy levels of the isotopologues 32S16O2, 33S16O2, and 34S16O2 with the levels of other isotopic variants are applied to calculations of vibrational-rotational energy leveles. To estimate the accuracy of the isotopic ratio, we calculated and compared with the measured line centers of the microwave spectrum of the 36S16O2 isotopologue. Comparison showed their quite satisfactory agreement at a level of 10-3 cm-1. Vibrational-rotational energy levels of sulfur dioxide isotopologues X S16O2, X = 35-38, up to J = 9 for five lower vibrational states are presented.
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