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LINE POSITION MEASUREMENTS OF $^{13}C ^{16}O_{2}$ AND $^{13}C ^{16}O ^{10}O$ AT ELEVATED TEMPERATURES IN THE 2.8 $\mu m$ REGION
Mark P. Esplin, John P. Mycroft
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Abstract
The AFGL High Resolution Interferometer has been used to measure spectra of a $CO_{2}$ sample enriched with $^{13}C$. The sample, consisting of 88% $^{13}C^{15}O_{z}$ and 11% $^{13}C^{16}O^{18}O$, was placed in a high temperature absorption cell with an optical path length of 3.5 meters. Spectra were taken at several pressures and at three temperatures: 300 K, 500 K, and 800 K. Line positional information from the different spectra were combined into a single data set. A least-squares-fit was then used to obtain new rotation-vibration constants. This work was supported by the Air Force Office of Scientific Research as part of AFGL Task 2310G1.