Infrared Spectrum of Hydrogen Fluoride

Abstract
The infrared vibration-rotation spectrum of HF has been re-examined out through J=11 for the fundamental, and through J=8 for the first overtone. Five lines of the pure rotational spectrum of HF (J=10, 11, 12, 14, 15) have been observed in absorption and emission between 15 and 24 μ. Extension of the measurement to larger J values makes it possible to observe the effect of the term HvJ3(J+1)3 in the energy, and to obtain Hv. With the new data the molecular constants have been re-evaluated by IBM machine. These constants when used with the energy expression permit accurate prediction of the observed energy levels.

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