Variable temperature pressure broadening of the 4(1,4)-3(2,1) transition of H2O by O2 and N2

Details Variable temperature pressure broadening of the 4(1,4)-3(2,1) transition of H2O by O2 and N2 Variable temperature pressure broadening of the 4(1,4)-3(2,1) transition of H2O by O2 and N2

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jqsrt..49..485g&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 49, no. 5, p. 485-489.

Physics

8

Ground State, Molecular Oscillations, Molecular Rotation, Nitrogen, Oxygen, Pressure Broadening, High Temperature Environments, Vapor Pressure

Scientific paper

The O2 and N2 pressure-broadening parameters of the 4(1,4)-3(2,1) rotational transition in the ground vibrational state of H2O have been measured in the temperature range between 100 and 520 K. Above 250 K the measurements were made in an equilibrium cell. Below 250 K a cell, which uses collisional cooling to circumvent the temperature limits imposed by the vapor pressure of the sample gas, was used. The data were fitted to an exponential temperature-dependence for data above 150 K with resultant n values of 0.81(3) for O2 and 0.70(3) for N2, where the entries in parentheses represent the error in the last significant figure of the parameter. Below 150 K the measured pressure-broadening parameters are smaller than those calculated using these values of n.

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