Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jqsrt..26..113c&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 26, Aug. 1981, p. 113-118.
Astronomy and Astrophysics
Astrophysics
25
Carbon, Electron Transitions, Electronic Spectra, Internuclear Properties, Swan Bands, Diatomic Molecules, Ground State, Molecular Energy Levels, Molecular Spectra, Planetary Atmospheres, Potential Energy, Self Consistent Fields
Scientific paper
Electronic transition moments and their variation with internuclear separation are calculated for the Ballik-Ramsay (b 3 Sigma g - a 3 Pi u), Fox-Herzberg (e 3 Pi g-a 3 Pi u) and Swan (d 3 Pi g-a 3 Pi u) band systems of C2, which appear in a variety of terrestrial and astrophysical sources. Electronic wave functions of the a 3 Pi u, b 2 Sigma g -, d 3 Pi g and e 3 Pi g states of C2 are obtained by means of a self-consistent field plus configuration interaction calculation using an atomic basis of 46 Slater-type orbitals, and theoretical potential energy curves and spectroscopic constants for the four electronic states were computed. The results obtained for both the potential energy curves and electronic transition moments are found to be in good agreement with experimental data.
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