On the temperature dependence of collisional linewidths of the 1000 — 0001 laser transition in the CO2 molecule

Unsaturated absorption coefficients in pure carbon dioxide and CO₂ — N₂ and CO₂ — He binary mixtures are measured at a pressure of 100 Torr in the temperature range of 300—700 K using a frequency-stabilised tunable CO₂ laser. The relative coefficients of collisional broadening caused by N₂ and He buffer gases and their temperature dependence are determined for the R(22) absorption line (10⁰0 — 00⁰1 transition) of the CO₂ molecule.