N2- and air-broadened linewidths and frequency-shifts of N2O

N-2- and air-broadened linewidths and pressure-induced frequency-shifts of N2O were measured from spectra of room temperature gas samples. The data were obtained with a high-resolution Fourier Transform spectrometer in the region between 1800 and 4800 cm(-1). Over 500 vibration-rotation lines were measured from which linewidth coefficients were accurately determined (< 2% on the average) for 1 less than or equal to \m\ less than or equal to 73. The shift coefficients were found to have a weak J dependence in which the magnitude of the coefficients increases in proportion to J for a given vibrational band. Further, the results show that the shift coefficients exhibit a line frequency dependence which follows from theory. In general, N-2- or air-broadened shift coefficients (which were found to be comparable in value for a given line) range from about -0.001 to almost -0.005 cm(-1)/atm for the lines covered in this study. (C) 2000 Elsevier Science Ltd. All rights reserved.