High-resolution spectral measurement of the HNO_3 59-μm band using a tunable diode laser

Abstract

High resolution spectra in the region of the v(2) band of nitric acid have been obtained for selected portions of the HNO(3) spectrum using tunable diode laser techniques. Continuous spectra are presented from 1718.97 cm(-1) to 1729.57 cm(-1), with a spectral resolution </=0.001 cm(-1) (30 MHz). Absolute line intensities and line positions are presented. Self- and foreign-gas (N(2)) broadening coefficients were iteratively calculated from the experimental data and were determined to be alpha(a) = 0.74 cm(-1)/atm and alpha(f) = 0.13 cm(-1)/atm, respectively.