New accurate calculations of ozone line-broadening by O2 and N2

Details New accurate calculations of ozone line-broadening by O2 and N2 New accurate calculations of ozone line-broadening by O2 and N2

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jqsrt..40..489h&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 40, Oct. 1988, p. 489-495.

Computer Science

31

Atmospheric Composition, Line Shape, Molecular Interactions, Ozone, Spectral Line Width, Gas Mixtures, Molecular Collisions

Scientific paper

Calculations of ozone line-broadening parameters by N2 and O2 are presented. A recent model, previously tested with success on H2O line-widths, is used. Unlike previous approaches, it provides a correct treatment of close collisions; trajectory changes in module and direction, as well as dispersive and repulsive contributions to the intermolecular interaction in the short range, are accounted for. Such improvements are of great importance for the modeling of pressure broadening for weakly polar molecular systems. Comparisons between O3-O2 and O3-N2 experimental and theoretical room-temperature half-widths for B-type bands are presented. It is shown that the model predicts accurately both broadenings and greatly improves theoretical results for oxygen broadening; furthermore, the effects of close collisions are demonstrated.

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