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High-resolution infrared spectra of boron trifluoride, enriched to 99.5 at. % 11 B, have been measured from 400 to 1650cm −1 . In that region we have identified and analyzed 16 absorption bands attributed to the three fundamental bands, two combination bands, 10 hot bands, and one difference band. All possible states were accessed in this region through direct transitions either from...
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