Collisional broadening of the P20 line of the 0001–1000 transition in CO2 measured with the aid of a tunable CO2 laser

The profile of the P₂0 absorption line of the 00⁰1–10⁰0 transition in CO₂ was recorded using a tunable high-pressure CO₂ laser. The pressure dependence of the broadening of this profile was determined directly. The collisional broadening constant was found to be 7.56 MHz/mm Hg. The experimental profile was in good agreement with the theoretical Voigt form.