PRESSURE BROADENING AND SHIFTS OF $O_{3}$ LINES IN THE 3-$\mu_{m}$ REGION
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Date
1992
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Publisher
Ohio State University
Abstract
We have recorded high-resolution absorption spectra of ozone broadened by dry air, by $N_{2}$ or by $O_{2}$ using the McMath Fourier transform spectrometer at the National Solar Observatory on Kitt Peak. The spectra were recorded at room temperature, covering the region from approximately $2600 cm^{-1}$ to $3600 cm^{-1}$ at a resolution of $0.01 cm^{-1}$. Broadening gas pressures varied from approximately 100 to 400 Torr. From these spectra we have determined pressure broadening and line shift coefficients for over 200 lines in the $\nu_{1} + \nu_{2}+\nu_{3}$ and 3$v_{3}$ bands. The halfwidth values obtained in these bands are similar to those obtained in the $\nu_{1}$ and $\nu_{3}$ bands, indicating that there is little vibrational dependence of the Lorentz broadening coefficient for ozone broadened by air, $N_{2}$ or $O_{2}$. However, the pressure line induced line shifts determined in the 3-$\mu$m bands are larger than those observed in the $4.8-\mu$m and $9-\mu$m $regions^{1-2}$.
Description
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Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Department of Physics The College of William and Mary, Williamsburg, VA 23187-8795; Department of Mathematics and Computer Science, Western Carolina University
Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Department of Physics The College of William and Mary, Williamsburg, VA 23187-8795; Department of Mathematics and Computer Science, Western Carolina University