Abstract

The importance of CO₂ as an atmospheric molecule makes the obtaining of high precision band parameters for a great number of bands a significant contribution to both theoretical and experimental studies of our atmosphere. Very accurate parameters on the (00011-00001) band of ¹²C¹⁶O₂ have been obtained by Pine and Guelachvili. Their measurment was accomplished by combining two spectra, a room temperature Fourier transform spectrum, and a high temperature tunable laser spectrum.¹ There have been numerous measurements of other bands of CO₂,^2,3 but they were made either with lower resolution spectrometers, or near room temperature where fewer rotational lines were excited, resulting in a less accurate determination of band parameters. In this work a high resolution Michelson interferometer was coupled with a high temperature absorption cell⁴ heated to 800 K to obtain a high resolution (0.007 cm⁻¹), high temperature spectrum of CO₂ in the 4.3 micron region.

© 1980 Optical Society of America