Collisional Broadening of CO2 Transition Lines 1000–0001 by Inert Gas Atoms at 300–700 K

Abstract

Using a tunable CO₂ laser, unsaturated absorption coefficients in pure CO₂ and binary CO₂ gas mixtures with inert gases He, Ar, Kr, and Xe in a 1 : 2 ratio at 100 Torr were measured at the central frequencies of the R(8), R(22), P(8), P(22), and P(32) CO₂ spectral lines of the 10⁰0-00⁰1 transition at 300–700 K. The coefficients of the collisional broadening of the CO₂ spectral lines by He, Ar, Kr, and Xe are determined. The obtained temperature dependences of the collisional broadening coefficients are approximated by power functions with two different degrees.