WHOLE-BAND ANALYSIS OF THE $\nu_{1}+2\nu_{2}$ BAND OF $N_{2}O$ BROADENED BY NITROGEN, OXYGEN AND $AIR^{\ast}$
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Date
1982
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Ohio State University
Abstract
Foreign-broadened line widths, and the rotational dependence of line intensities, in the $\nu_{1}+2\nu_{2}$ vibration-rotation band of $N_{2}O$ have been determined by nonlinear least-squares, whole band analysis. The retrieved nitrogen-broadened widths agree with the revised values reported by $Toch.^1$ The retrieved nitrogen-, air- and oxygen-broadened widths indicate that the air-broadened widths in the AFGL line listing should be reduced by approximately 10%. The rotational dependence f(m) =(M = -J"" in the P-branch, =J"" + 1 in the R-branch) of the line intensities was modelled by: $f(m) = 1+\beta_{1} m + \beta_{2} m^{2}, \beta_{1}$ and $\beta_{2}$ were retrieved, with the largest $|m|$ in the spectrum of approximately 40. Analysis of several spectra showed that $\beta_{1}$ is not significantly different from zero, $\beta_{1} = 0.5 (\pm 3.0) \times 10^{-4}$, while $\beta_{2}$ is $0.645(\pm 0.006) \times 10^{-4}$.
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$^{\ast}$ This work was supported in part by NASA Grant NSG 7479. 1. R.A. Toth, paper TE4, 36th Annual Symposium on Molecular Spectroscopy (1981).