INTENSITIES AND SELF-BROADENINGS IN HF AND HCl
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Date
1985
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Ohio State University
Abstract
Precision linestrengths and self-broadened lineshapes in the fundamental bands of HF and HC1 at T=295 K have been measured with a high-resolution difference-frequency laser spectrometer. The intensity measurements were carried out under low-pressure. Doppler-limited conditions with high-purity samples yielding accurate integrated band strengths $(S^{I}_{v} =390(4),\ 113(1),\ 38(1) cm^{-2}\ atm^{-1})$, transition moments ($|<\mu_{v} >|= 0.0998(5), 0.0730(5), 0.0731(5)$ Debye), and linear Herman-Wallis factors ($c_{1} = -0.0521(2), -0.0256(1), -0.0253(2)$) for HF, $H^{35}Cl$ and $H^{37}Cl$ respectively. The self-broadening measurements were made for pressures less than -200 Torr to minimize polymerization. Lineshape profiles incorporating collisional narrowing effects were least-squares fit to the data in order to extract the broadening coefficients and diffusion constants for these gases.
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Author Institution: Molecular Spectroscopy Division, National Bureau of Standards; Gas and Particulate Science Division, National Bureau of Standards