Line Broadening, Shifting, and Mixing in the Fundamental Band of CO Perturbed by N2at 301 K

Using a difference frequency spectrometer we have measured the widths, shifts and line mixing parameters of many lines in the fundamental band of CO perturbed by N2at approximately 50 kPa and 301 K. The spectral resolution was 6 × 10−5cm−1and the typical signal to noise ratio exceeded 2000. The spectral data are more extensive and more precise than the data currently used in the HITRAN92 database. At the 1% level we have reached the limit of accuracy with which a Lorentzian model will represent the data.