COLLISIONAL BROADENING OF SPECTRAL-LINES IN THE A-X (0-0) SYSTEM OF NO BY N-2, AR, AND HE AT ELEVATED PRESSURES MEASURED BY LASER-INDUCED FLUORESCENCE

Lineshape parameters for NO A-X(0,0) transitions broadened by He, Ar, and N-2 have been determined at room temperature from LIF at pressures up to 5 bar. Isolated line shapes have been extracted from pressure b roadened LIF spectra using a deconvolution technique. It was found tha t a formalism based on a combined impact and statistical theory leads to an adequate representation of the asymmetric lineshapes. Pressure b roadening and shift coefficients are in good agreement with published data obtained at much lower pressures.