Mathematics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jqsrt..29..539m&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 29, June 1983, p. 539-542. NASA-supported res
Mathematics
21
Absorption Spectra, Infrared Absorption, Molecular Spectroscopy, Nitrogen, Ozone, Pressure Broadening, Arc Discharges, Gas Spectroscopy, Iterative Solution, Least Squares Method, Radiative Transfer, Spectral Resolution
Scientific paper
Pressure-broadening coefficients were determined for 156 O3 absorption lines made with the Fourier-transform spectrometer at the McMath Solar Telescope of the Kitt Peak National Observatory in the 9-micron region, with a resolution of 0.005/cm. O3 prepared from O2 by silent arc discharge and collected on cold silica gel was held at stable concentrations over 50 percent in a glass or stainless-steel cell with a rock-salt window, and broadened with dry N2. Interferograms were made in several scans of the interferometer during 30 min. The pressure-broadening coefficients were calculated by an iterative least-squares approach, a synthetic spectrum was constructed and compared to the actual spectrum, and the parameters were varied to achieve the best fit. It is shown that the estimated precision of the values reported is about 7 percent, and that the deviation from the theoretical calculations of Tejwani and Yeung (1975) averaged 7.6 percent (a small number of large discrepancies having been excluded).
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