LINE-FREQUENCY MEASUREMENTS AND ANALYSIS OF N2O BETWEEN 900 AND 4700 CM-1

The N2O infrared spectrum from 900 to 4700 cm-1 has been studied with a high-resolution Fourier-transform spectrometer. Measurements were made of line frequencies of several N2O isotopes for several ground-state and hot bands. A few of these bands are being reported for the first time, to my knowledge: the 1530-0330, 2330-0330, 0441-0440, 0441-0330, 0531-0330, and 1331-0330 bands of (N2O)-N-14-O-16. Also for the first time to my knowledge, perturbation-enhanced transitions in the 0710-0110 and 0730-0110 bands were assigned and measured. The frequencies have been analyzed to obtain a unique set of effective vibration-rotation parameters for each vibrational state. The results obtained from this research are of high accuracy for the ground-state and the first-excited-state bands of (N2O)-N-14-O-16, in which the computed frequencies derived from the least-squares fits are known to an absolute uncertainty of only +/- 4 x 10(-5) for nonperturbed transitions.