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The electronic spectrum of gas-phase tellurium dioxide has been recorded between 345 and 406 nm using the technique of laser-induced fluorescence spectroscopy. The TeO2 sample was prepared by direct heating of the solid and by seeding it in a continuous free-jet expansion in argon. Twenty-seven cold bands and thirty-two hot bands were assigned. The wavenumbers of the band origin and symmetric stretching and bending vibrational modes for the upper and lower states were determined in a simple least-squares fit: ν0 = 25526 cm−1, ω1′ = 679 cm−1, ω2′ = 220 cm−1, ω1″ = 823 cm−1, ω2″ = 282 cm−1. 相似文献
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