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Frequencies of N2O in the 1100- to 1440-cm−1 region

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Abstract

The infrared spectrum of N2O in the region between 1100 and 1440 cm−1 has been studied at 0.005-cm−1 resolution with a Fourier-transform spectrometer. Measurements were made of line positions of the species 14N216O, 14N15N16O, 15N14N16O, 14N218O, 14N217O, and 15N216O for several ground-state and hot bands. The observed line frequencies were analyzed to obtain values of band centers and upper- and lower-state rotational constants. Measurements from other studies covering the pure rotational region and the ν2 region were used in some of the analyses. Results from the least-squares fits for the 0200–0000, 0310–0110, 0400–0200, and 0420(e)–0220(e) bands of the 14N16O2 molecule indicate that the high J levels of the upper states of those bands are perturbed, mainly because of a vibration–rotation interaction (l-type resonance) between the respective upper states and close-lying states of the same vibrational type with Δl = ±2.

© 1986 Optical Society of America

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