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

Abstract: The temperature dependence of air-broadened half-widths are reported for some 500 transitions in the (000)–(000) and (010)–(000) bands of H2 16O using gas sample temperatures ranging from 241 to 388K. These observations were obtained from infrared laboratory spectra recorded at 0.006–0.011cm−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. [Copyright &y& Elsevier]