L-RESONANCE INTENSITY EFFECTS AND PRESSURE BROADENING OF N2O AT 17-MU-M

intensities of PR branch transitions in the three hotbands 2 nu(2)(2f) <-- nu(2)(1f), 2 nu(2)(2e) <-- nu(2)(1e), and 2 nu(2)(0e) <-- nu(2)(1 e) have been measured using high resolution spectra recorded with the McMath FTS at the National Solar Observatory in Kitt Peak, Arizona. Th e two latter bands show intensity perturbations mostly due to rotation al l-type doubling while the hot band ending in the (02(2f)0) state re mains unperturbed. Based on mixing coefficients calculated from effect ive molecular constants, intensity perturbation factors were calculate d which are shown to be equivalent to a quadratic term used in the Her man-Wallis factor expression. As part of the intensity retrieval, self -, N-2-, and He-broadening coefficients of N2O were determined in the nu(2) fundamental and the three hot bands, The Linewidths reported in this study have been combined with the best available literature data from other bands to retrieve temperature dependent relaxation rates du e to rotationally inelastic collision based on a scaling law. (C) 1996 Academic Press, Inc.