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THE HIGH RESOLUTION SPECTRUM AND ROTATIONAL ANALYSIS OF THE $\nu_{6}$ BAND OF CARBONYL FLUORIDE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16974

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Title: THE HIGH RESOLUTION SPECTRUM AND ROTATIONAL ANALYSIS OF THE $\nu_{6}$ BAND OF CARBONYL FLUORIDE
Creators: Thakur, K. B.; Friedl, R. R.; Rinsland, C. P.; Devi, V. Malathy; Rao, K. Narahari
Issue Date: 1986
Abstract: The asymmetric top molecule $COF_{2}$ has gained additional interest as the presence of the $\nu_{1}$ and $\nu_{6}$ bands of it have been observed recently in $-0.01 cm^{-1}$ resolution spectra of the $stratosphere^{1}$. To provide spectroscopic parameters needed for the analysis of $COF_{2}$ absorption in such atmospheric spectra, $0.005 cm^{-1}$ resolution laboratory spectra of the $\nu_{6}$ band have been recorded at room temperature and a full rotatinal analysis has been performed. The laboratory data were obtained with a Bomen Fourier transform spectrometer at the Jet Propulsion Laboratory. Lines in the $\nu_{1}$ band of OCS were used for calibration. Although the strong Q branch at $774 cm^{-1}$ is only partially resolved in the laboratory data, most of the K structure of various J subgroups in the P and R branches is fully resolved. With the help of ground-state rotational constants obtained from the microwave data of $Carpenter^{2}$, around 1300 transition up to $J = 40$ have been assigned and fitted to a standard deviation of $0.0006 cm^{-1}$. By incorporating quartic and sextic centrifugal distortion coefficients of Watson's reduced Hamiltonian into the analysis, upper state rotational constants A, B, and C have been determined to an accuracy better than $10^{-5} cm^{-1}$. The results will be discussed along with the asymmetry splitting of the low K transitions for each J. This work was supported under USAF Agreement RES D5-674 with the Air Force Geophysics Laboratory.
URI: http://hdl.handle.net/1811/16974
Other Identifiers: 1986-RB-7
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