Abstract
Anderson's general theory of collision line broadening has been applied to the calculation of the widths of a large number of pure-rotational transitions in H 2 O, self-broadened by H 2 O and foreign gas broadened by O 2. In the former case only dipole-dipole forces were considired, in the latter only dipole-quadrupole. The method of calculation followed that previously reported for H 2O-N 2, and was performed on the IBM 7090. The self-broadened widths, at 300° and 360°K, are presented in tabular form; some regularities and averages are graphed and discussed. There is a marked variation from line to line, both in the absolute value and the ratio of self-broadening to N 2-broadening. The intensity-weighted value of the latter ratio is 5·49, in agreement with experiment. Individual widths show fair correlation with the few available experimental values. The H 2 O- O 2 widths depend on the uncertain value of the oxygen quadrupole, and are presented only graphically. The correlation with H 2 O- N 2 is close enough so that the H 2 O- N 2 results may be used for atmospheric problems.
Published Version
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