Abstract

High resolution spectra in the region of the 2ν9 band of nitric acid have been obtained for selected portions of the HNO3 spectrum using tunable diode laser techniques. Continuous spectra are presented from 891.25 cm−1 to 898.77 cm−1, with a spectral resolution ≤0.001 cm−1 (30 MHz). Absolute line intensities and line positions are presented. Absolute wavelength calibration was obtained by frequency mixing the diode laser with a C13O216 isotope laser. Self and foreign gas (N2) broadening coefficients were iteratively calculated from the experimental data and were determined to be αa = 0.8 cm−1/atm and αf = 0.13 cm−1/atm, respectively.

© 1978 Optical Society of America

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