Infrared absorption cross-sections and integrated absorption intensities of HFC-134 and HFC-143a vapour.

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Molecular Spectra: Infrared Spectra, Molecular Processes: Earth Atmosphere

Scientific paper

Infrared absorption cross-sections and integrated absorption intensities of HFC-134 (1,1,2,2-tetrafluoroethane) and HFC-143a (1,1,1-trifluoroethane) vapour have been determined from laboratory measurements at six temperatures (203, 213, 233, 253, 273 and 297 K) for the region 560-1900 cm-1 (5.3-17.9 μm) at 0.03 cm-1 instrument resolution, by Fourier transform infrared spectroscopy. In addition, air-broadened spectra have been recorded at 297 K and pressures of 5, 20 and 100 kPa air. Inter-comparisons between this work and previous studies have been made where possible.

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