A THEORETICAL INVESTIGATION OF THE ORIGINS OF THE GREEN AND RED SPECTRA OF $Ca_{2}$
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Date
1982
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Publisher
Ohio State University
Abstract
The assignments of the emission spectra of $Ca_{2}$ in the red and in the green has been the subject of discussion recently at this Symposium (1) and in the literature (2,3). A definitive set of assignments has not yet been agreed upon. We have calculated the potential energy curves and transition moments of the ground $^{1}{\Sigma^{+}_{g}}$ and $1,2 {^{1}{\Sigma^{1}}_{u}}$ states of $Ca_{2}$ using a first order CI approach. These calculations support the assignment of the observed red and green emission spectra of $Ca_{2}$ to transitions between the ground state and the $1,2 {^{1}{\Sigma^{+}}_{u}}$ states, respectively. Prediassociation of the $1 {^{1}{\Sigma^{+}}_{u}}$ state by the $1 {^{3}\pi_{u}}$ state is shown the be possible.
Description
1. J.C. Wyaa, paper RE13 34th Symposium on Molecular Spectroscopy, Columbus, Ohio (June 1979). 2. W.J. Balfour and R.F. Whitlock, Can. J. Phys. 53, 472 (1975). 3. J.C. Miller and L. Andrews, Appl. Spectrose. Rev. 16, 1 (1980), and references therein.