Abstract

A set of 59 spectra of pure nitric acid was obtained at temperatures ranging from 236 to 294 K using path lengths from 10 to 50 cm and pressures from 0.05 to 1.1 Torr. No strong temperature dependencies were observed over the range of our measurements. Absorption coefficients and mean line-spacing parameters were determined at each 1-cm−1 interval in the three strong bands at 5.9, 7.5, and 1.3 μm by using a two-parameter random-band model. The resulting intensities for these bands are 1530 ± 100, 1383 ± 70, and 692 ± 35 cm−2 amagat−1, respectively. In addition, the absorption coefficients were determined in the three weak bands at 8.3, 13.2, and 15.5 μm. The band intensities derived are 44 ± 4, 45 ± 4, and 50 ± 5 cm−2 amagat−1, respectively.

© 1984 Optical Society of America

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