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S.R. Federman, R.M. Schectman, M. Brown, S. Cheng, R.E. Irving (U. Toledo), M.C. Fritts (U. Minnesota), N.D. Gibson (Dennison U.)
Oscillator strengths for transitions in Cl~{\small II} and {\small III} are derived from lifetimes and branching fractions measured with beam-foil techniques. The focus is on the multiplets at 1071 Å\ in Cl~{\small II} and 1011 Å\ in Cl~{\small III} whose lines are seen in spectra of diffuse interstellar clouds and the Io torus acquired with the Far Ultraviolet Spectroscopic Explorer. These data represent the first complete set of experimental f-values for the lines in the multiplets. Our results for Cl~{\small II} \lambda1071 agree very well with the most recent theoretical effort and with Morton's newest recommendations. For Cl~{\small III}, however, our f-values are significantly larger than those given by Morton; instead, they are more consistent with recent large-scale theoretical calculations. Extensive tests provide confirmation that LS coupling rules apply to the transitions for these multiplets.
This work was supported by NASA grant NAG5-11440 to the University of Toledo.
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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.