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dc.creatorPine, A. S.en_US
dc.creatorLooney, J. P.en_US
dc.date.accessioned2006-06-15T17:54:54Z
dc.date.available2006-06-15T17:54:54Z
dc.date.issued1986en_US
dc.identifier1986-TB-11en_US
dc.identifier.urihttp://hdl.handle.net/1811/17060
dc.descriptionAddress of Pine: Molecular Spectroscopy Division, National Bureau of Standards, Gaithersburg, MD 208. Address of Looney: Department of Physics, Pennsylvania State University, University Park, PA 16802.en_US
dc.descriptionAuthor Institution:en_US
dc.description.abstract$N_{2}$ and air broadened lineshapes of HF and HCl transitions in the $v = 1 \leftarrow 0$ bands have been measured at T-295 and 202 K with a high-resolution difference-frequency laser spectrometer. Pressure broadening and shifts and collisional narrowing parameters have been extracted by least squares fitting of several collisional profiles to the spectra. At low pressures, the collisional, or Dicke, narrowing effect causes deviations from the Voigt profile having a Doppler-fixed Gaussian component and yields a measure of the diffusion constants for the hydrogen halides in the buffer gases. At high J, where the pressure shifts are comparable to or larger than the broadenings, a slight asymmetry is observed in the lineshapes which is attributed to statistical correlation between velocity- and states-changing collisions. The ration of air-to-$N_{2}$ broadening varies systematically with rotational level and is always somewhat larger than that given by the relative quadrupolar contributions of $O_{2}$ and $N_{2}$. The temperature variations in the broadening coefficients are also J dependent, deviating significantly from $T^{-1/2}$ and exhibiting opposite behavior for HF and HCl.en_US
dc.format.extent155755 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.title$N_{2}$ AND AIR BROADENING IN THE FUNDAMENTAL BANDS OF HF AND HCIen_US
dc.typearticleen_US


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