The ν1, 2 ν2, and ν3 interacting bands of 14N 16O 2: Line positions and intensities

Abstract

High-resolution Fourier transform spectra have been used in the 1200–1850 cm −1 spectral region to measure the positions of lines with K a = 0–15 for the ν 1 and ν 3 bands of 14N 16O 2, as well as lines with K a = 0, 1, 2, and 6 for the 2 ν 2 band up to very high N values. The spin-rotation energy levels were very satisfactorily reproduced using a theoretical model which takes explicitly into account both the Coriolis interactions between the spin-rotation levels of the (001) vibrational state with those of (100) and (020), and the spin-rotation resonances in each vibrational state. In this analysis, precise band centers and rotational, spin-rotation, and coupling constants were obtained for the triad {(100), (020), (001)} of interacting states for 14N 16O 2. In addition, using a large set of individual line intensities we have determined precisely the ν 1, 2 ν 2, and ν 3 transition moment operators of 14N 16O 2. Finally, a comprehensive list of line positions and intensities of the interacting ν 1, 2 ν 2, and ν 3 bands of 14N 16O 2 has been generated.