Quantitative Line-Width Measurements in the Infrared. II. Unpressurized Carbon Monoxide

Abstract

Experimental measurements on self‐broadening of CO are correlated quantitatively by the use of a dispersion formula for line‐shape representation. Interpretation of experimental data in terms of a simplified line‐intensity distribution leads to the conclusion that the apparent rotational half‐width of CO changes with the pressure of CO at approximately the same rate as with the pressure of H₂ for the fundamental. Similar calculations for the first overtone lead to relatively small values for the apparent rotational half‐width. Numerical calculations for a realistic line‐intensity distribution have not been carried out.