Microwave Spectrum of Compressed O2-Foreign Gas Mixtures in the 48–81 GHz Region

Abstract

A Fabry-Perot interferometer with one spherical mirror was used to measure the absorption of pure O2 and O2–Ar and O2–N2 gas mixtures. The experimental pressure range was 3.7–51 atm and the frequency range 48–81 GHz. The measured spectrum was successfully reproduced by a calculated line shape using Gordon's pressure broadening theory and 3- and 4-body classical scattering calculations.