Abstract
Abstract : A high resolution interferometer was used to measure the spectra of several different isotopically enriched carbon dioxide samples heated to 800 K in a high temperature absorption cell. An interactive line assignment computer program was developed and used to identify, in the two wavelength regions, a total of over 8000 lines belonging to 73 different rotation-vibration bands. In the 4.3 micrometer region 19 bands were identified to 12C 16O2, 15 for 13C16O2, 5 bands each for 12C16O18O, 12C18O2, and 13C16O18O, and one band for 132C16O17. In the 2.8 micrometer region 11 bands were identified for 12C16O2, 10 for 12C16O18O, and 2 for 12C18O2. New molecular constants were obtained for each band from a least-squares-fit to the observed line positions. The new molecular constants reproduce the position of spectral lines to within an accuracy of approximately 0.0004/cm.
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