Measurements of pressure-induced shifts in the 1-0 and 2-0 bands of HF and in the 2-0 bands of H35Cl and H37Cl |
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Authors: | G Guelachvili MAH Smith |
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Institution: | Laboratoire d''Infrarouge, Bat. 350, Paris XI, Campus d''Orsay, 91405 Orsay, France;Department of the Geophysical Sciences, The University of Chicago, Chicago, IL 60637, U.S.A. |
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Abstract: | Fourier absorption spectra of HCl and HF measured at room temperature and low pressures were found to show evidence of pressure-induced shifts of the spectral lines at gas pressures of only 10 torr. Self-induced shifts were measured for the HF 2-0 band and for the H35Cl and H37 2-0 bands. There were also measured in the same spectra shifts in the HF 2-0 band due to HCl and shifts in both HCl bands due to HF, with indications of shift oscillation due to near-resonant dipole-dipole interactions between HCl and HF. Separate measurements were made of pressure-induced shifts in the HF 1-0 and 2-0 bands and in both isotopic HCl bands, using separately argon, neon, nitrogen and carbon dioxide as the perturbing gases. |
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