Some oscillator strengths in the spectra of C i, O i, Si i, Ca ii and Sr ii

A number of wave functions for bound electrons have been calculated in scaled Thomas-Fermi ion potentials in order to evaluate some oscillator strengths and mean square radii. The results differ only slightly from those obtained by the well-known method of Bates and Damgaard. After that, the values of the oscillator strengths for the transition 4 s→4 p in Si i have been evaluated in intermediate coupling, showing large differences with the LS-coupling results. These new values are supported by the fact that they show somewhat better agreement with observations, described earlier in this issue of Solar Physics by De Jager and Neven. © 1970 D. Reidel Publishing Company.SCOPUS: ar.j