CONTINUUM ABSORPTION MEASUREMENTS AND LINE SHAPE MODEL COMPARISONS

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1991

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Ohio State University

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Absorption spectra of $H_{2}O$ are recorded in different spectral window regions with a Fourier Transform Spectrometer and a high temperature-high pressure cell Pure $CO_{2}$ and $N_{2}$ broadened $CO_{2}$ spectra are also obtained in the $4.1\mu m$ region where far wing absorption dominates. In this case a 10 meter White cell is also used which allows lower density measurements to be made. Birnbaum’s line shape /1/ is used to represent the far wing absorption of $CO_{2}$ and $H_{2}O$. The theory is semiempirical and does not include line mixing. Corrections which account for line mixing contributions are needed to obtain agreement with experiment. Justification for these corrections will be given./1/ G. Birnbaum, J. Quant. Spectrosc. Radiat. Transfer 21, 597 (1979).

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Author Institution: Applied Physics Laboratory, The Johns Hopkins University

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