Absolute wavenumbers and molecular constants of the fundamental bands of 12C16O, 12C17O, 12C18O, 13C16O, 13C17O, 13C18O and of the 2-1 bands of 12C16O and 13C16O, around 5μm, by Fourier spectroscopy under vacuum

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Scientific paper

This paper is part of a more general work undertaken on the determination of Dunham coefficients for all the isotopic species of CO. The absolute wavenumbers of 466 CO lines obtained from absorption spectra of six different isotopic forms in the 5 μm region are reported with an accuracy of the order of 3 MHz or less for about 300 lines. Absolutely measured within 9 MHz, 43 lines of 13C17O (a molecule whose spectrum has not been observed in the infrared before) are given together with 59 wavenumbers measured within 3.2 MHz of 12C17O, also reported for the first time. The wavenumbers extend from 1939 to 2271 cm-1. More than 50 accurate molecular constants are available allowing precise determination of pure rotational transitions. These metrologic data should be helpful both for microwave or infrared identification in astronomy, for instance, and for more specific molecular purposes. The high self-consistency of these Fourier results measured versus the Krypton line, and their consistency with all the other accurate measurements suggest that the reported values be adopted as secondary standards.

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Absolute wavenumbers and molecular constants of the fundamental bands of 12C16O, 12C17O, 12C18O, 13C16O, 13C17O, 13C18O and of the 2-1 bands of 12C16O and 13C16O, around 5μm, by Fourier spectroscopy under vacuum does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

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