Air-broadening of H2O as a function of temperature: 696–2163 cm−1

Abstract The temperature dependence of air-broadened half-widths are reported for some 500 transitions in the (0 0 0)–(0 0 0) and (0 1 0)–(0 0 0) bands of H 2 16 O using gas sample temperatures ranging from 241 to 388 K. These observations were obtained from infrared laboratory spectra recorded at 0.006–0.011 cm −1 resolution with the McMath–Pierce Fourier transform spectrometer located at Kitt Peak. The experimental values of the temperature dependence exponents, η , were grouped into eight subsets and fitted to empirical functions in a semi-global procedure. Overall, the values of η were found to decrease with increasing rotational quantum number J . The number of measurements (over 2200) and transitions (586) involved exceeds by a large margin that of any other comparable reported study.

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