MEASUREMENTS OF PRESSURE BROADENING AND PRESSURE SHIFTING BY $N_{2}$ IN THE $v_{1}$ AND $v_{3}$ BANDS OF $H_{2}^{16}O$
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Date
1992
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Ohio State University
Abstract
Lorentz nitrogen broadening coefficients and nitrogen pressure-induced shift coefficients have been measured for six lines in the $v_{1}$ band and 98 lines in the $\nu_{3}$ band of $H_{2}^{16}O$. The results were obtained from analysis of ten high-resolution ($0.01 cm^{-1}$) infrared absorption spectra recorded at room temperature using the McMath Fourier transform spectrometer of the National Solar Obsevatory on Kitt Peak. The analysis was performed using a nonlinear least-squares spectrum fitting procedure. The measured nitrogen broadening coefficients ranged from -0.04 to between $-0.104 cm^{-1} atm^{-1}$ while the nitrogen pressure-induced shift coefficients varied between +0.004 and $-0.011 cm^{-1}$ atm${-1}$. The majority of the measured pressure-induced shift coefficients ($>$90\%) were found to be negative. The results are compared with previous values reported in the literature, where available.
Description
Author Institution: Department of Physics, College of William and Mary; Atmospheric Sciences Division, NASA Langley Research Centre