LINE BROADENING IN THE FUNDAMENTAL-BAND OF CO IN CO-HE AND CO-AR MIXTURES

We present accurate broadening coefficients for many lines of the fund amental band of CO highly diluted in He and Ar at 301.5 K. It is shown that a soft collision model gives a reasonable fit to the data at pre ssures up to 1 atm. A distinction is drawn between the accuracy with w hich fitting parameters may be determined and the accuracy with which a spectral profile fits experimental data. Differences between a model profile and the experimental profile are quantified, and the underlyi ng physics omitted from the spectral model is briefly discussed. (C) 1 998 Academic Press.