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The absorption spectrum of CO2 around 7740 cm-1
Authors:Francisco PJ Valero  Robert W Boese
Institution:Ames Research Center, NASA, Moffett Field, CA 94035, U.S.A.
Abstract:Absolute intensities of the vibration-rotation lines of the CO2 401II←000 band 7734 cm-1 are measured under high-resolution, low-pressure conditions by use of a White-type 25-m base-path, absorption cell together with a 5-m Czerny-Turner spectrometer. The total band intensity SB, the purely vibrational transition moment
/></figure>, and the vibration-rotation interaction constant ζ are calculated from the intensity measurements. The values obtained for these parameters are <em>S<sub>B</sub></em>(401<sub>II</sub>) = (7.06±0.07) × 10<sup>-5</sup> cm<sup>-2</sup> atm<sup>-1</sup><sub>293°K</sub>, <figure class=/></figure> = (3.08±0.03)×10<sup>-5</sup> debye, and ζ = (2.5±0.5)×10<sup>-4</sup>. The intensity of the associated “hot band” 411<sub>II</sub>←010 is also determined and found to be <em>S<sub>B</sub></em>(411<sub>II</sub>←010) = (0.53±0.02)×10<sup>-5</sup> cm<sup>-2</sup> atm<sup>-1</sup><sub>293°K</sub>.</td>
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