PROBABILITIES OF ALLOWED AND FORBIDDEN ELECTRONIC TRANSITIONS IN $C_{2}{^{*}}$
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Date
1960
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Ohio State University
Abstract
“The probabilities and the lifetimes of nine electronic transitions among low electronic states of the $C_{2}$ molecule are evaluated. The calculated f value of the Swan transition is .048 (to be $compared^{1,2}$ with the experimental value $f \cong .034$). The probability and the lifetime of the transition from the ground state $^{1}\Sigma^{+}_{g}$ to the first excited state $^{3}\Pi_{u}$, are calculated (both one and two center integrals of the spin orbit matrix elements are computed). The implications of the above calculations are discussed with regard to the recently found $^{1}\Sigma^{+}_{g}, \ {^{3}\Sigma}^{-}_{g}$ $perturbation.^{3}$ The f value for the Swan transition and accurate values of the partition functions are used to recalculate the molecular abundancy S in the solar reversing $layer.^{4}$ It is found that log $S = 12.83$ at the molecular excitation temperature of $4500^\circ K$.”
Description
$^{*}$ This research was supported by the United States Atomic Energy Commission. $^{1}$ L. Brewer, W. T. Hicks and O. H. Krikorian (to be submitted for publication). $^{2}$ E. Clementi, U.C.R.L.--0085, February 1960. $^{3}$ E. A. Ballik and D. A. Ramsey, J. Chem. Phys., 31, 1128 (1959). $^{4}$ J. Hupaerts Annales d'Astrophysique, 10, 237 (1947).
Author Institution: Department of Chemistry and Lawrence Radiation Laboratory, University of California
Author Institution: Department of Chemistry and Lawrence Radiation Laboratory, University of California