Line Intensity And Pressure Broadening Studies In Hydrogen Fluoride And Other Problems In Infrared Spectroscopy

The principal activity under the contract was to carry out experiments which would give information about the shapes, shifts, and effects of self-broadening of spectral lines using the vibration-rotation lines in the fundamental infrared band of Hydrogen Fluoride as the medium for measurement. All measurements were made with a high-dispersion vacuum-grating infrared spectrometer capable of resolution to something bett than 0.1/cm in the region of the HF fundamental. Slit functions were carefully determined using absorption lines from the fundamental of CO at very low pressures. Computational methods were developed making it possible to determine true line shapes accurately. Measured line shapes were compared with predicted Lorentz line shapes. The Lorentz parameter was obtained by the equivalentwidth method for the pressure broadened spectral lines in the HF fundamental from m = -6 to m = +12. Investigations of the infrared spectra of several molecules such as CO2, T2O, CH3C1 are included. Molecular constants are listed. (Author).