Effects of the close approach of potential curves in photoabsorption by diatomic molecules. II - Temperature dependence of the O2 cross section in the region 130-160 nm

Details Effects of the close approach of potential curves in photoabsorption by diatomic molecules. II - Temperature dependence of the O2 cross section in the region 130-160 nm Effects of the close approach of potential curves in photoabsorption by diatomic molecules. II - Temperature dependence of the O2 cross section in the region 130-160 nm

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jqsrt..38...19w&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 38, July 1987, p. 19-27.

Computer Science

Numerical Analysis

36

Diatomic Molecules, Oxygen, Photoabsorption, Rydberg Series, Schumann-Runge Bands, Temperature Dependence, Absorption Cross Sections, Molecular Energy Levels, Numerical Analysis, Schroedinger Equation

Scientific paper

The photoabsorption cross section of oxygen has been measured at temperatures of 295 and 575 K over the wavelength range 130-160 nm. The temperature coefficient shows strong structure in the part of the Schumann-Runge continuum below 136 nm. The observed data have been fitted with theoretical calculations that include a 3Pi(u) continuum and take account of the coupling between the valence and Rydberg 3Sigma(- u) states. Potential curves and transition moments for these states obtained from the fitting procedure are given. The diabatic electronic coupling constant for the 3Sigma(- u) states is found to be 0.485 eV.

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