Abstract

The WO molecule was formed as an impurity during the excitation of a mixture of WCl 6 vapor and He in a microwave discharge lamp. The emission spectra were recorded using a high-resolution Fourier transform spectrometer. A rotational analysis of the strong bands in the 9000–25 000 cm −1 interval has been carried out and the bands have been classified into two groups with different lower states. The two lower states have been assigned as the Ω=0 + and Ω=1 spin components of the X 3 Σ − ground state. Ab initio calculations have also been performed and they confirm our experimental assignments.

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