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Proceedings Paper

High Resolution High Temperature Spectral Line Position Measurements Of Carbon Dioxide In The Fifteen Micron Spectral Region
Author(s): Michael Hoke; Mark Esplin
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Paper Abstract

Low pressure (5 Torr), high temperature (800K) gas samples of carbon dioxide have recently been studied using the high resolution interferometer and high temperature absorption cell at the Air Force Geophysics Laboratory. Our line position measurements, for the principal isotope, in the fifteen micron spectral region not only extend to high rotational quantum number many rotational vibrational bands which have been measured previously at room temperature, but also include previously unmeasured vibrational bands. Band identification and analyses of the dense spectra has been enhanced by the development of a modified Loomis-Wood graphical technique. This new graphical technique has made it easier to identify spectral lines of bands for which rotational constants are approximately known and to estimate improved values of the rotational constants once lines of the band under study are identified. Rotational constants from the Direct Numerical Diagonalization (DND) calculations of Wattson and Rothman have been found to be in good agreement with those determined from the data. The theoretical values were very useful in band assignment of spectral lines. The predictive power of the theoretical DND technique combined with the new graphical technique permitted the identification and analyses of several weak and previously unmeasured vibrational bands.

Paper Details

Date Published: 1 December 1989
PDF: 3 pages
Proc. SPIE 1145, 7th Intl Conf on Fourier Transform Spectroscopy, (1 December 1989); doi: 10.1117/12.969567
Show Author Affiliations
Michael Hoke, Air Force Geophysics Laboratory (United States)
Mark Esplin, Utah State University (United States)

Published in SPIE Proceedings Vol. 1145:
7th Intl Conf on Fourier Transform Spectroscopy
David G. Cameron, Editor(s)

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