High-pressure absorption spectrum of CO2 laser bands at 10 μm

Abstract

The absorption coefficient at the center of several lines of the 961‐ and 1064‐cm⁻¹ bands of CO₂ has been measured for CO₂ and mixtures of CO₂ and N₂ and He at absolute pressures to 18 atm. The data are in good agreement with the theory of pressure‐broadened non‐Lorentzian overlapping lines, which predicts greater peak absorption than theories that calculate the spectrum as a sum of Lorentzian‐shaped lines.