Theoretical results for the far-wing line shapes and corresponding absorption coefficients in the high-frequency wing of the ν3 fundamental band of self-broadened CO2 are presented for a number of temperatures between 218 and 751 K. These first-principles calculations are made assuming binary collisions within the framework of a quasi-static theory with a more accurate interaction potential than in previous calculations. The theoretical results are compared with existing laboratory data and are in good agreement for all the temperatures considered.
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The temperature dependence of the high frequency far wings of the self-broadened CO2 lines has been investigated in the 2400–2600-cm-1 spectral region. The temperature dependence of the corrective shape factor X(σ,T) is demonstrated for the first time.
