Theoretical lifetimes and oscillator strengths in Ce II.
Application to
the chemical composition of the Sun
P. Palmeri, P. Quinet, J.-F. Wyart and E. Biémont
Phys. Scr. (in press, 1999)
A new set of transition probabilities is derived for many transitions of Ce II
of astrophysical interest. A relativistic Hartree-Fock method, combined with
a least- squares fitting of the available experimental levels, including
a number of newly determined values, has been used for the determination
of the eigenfunctions and eigenvalues. Configuration interaction and
core-polarization effects have been introduced in the calculations.
The derived oscillator strengths lead to a new value of the cerium abundance
in the solar photosphere which is somewhat larger but in reasonable agreement
with the meteoritic result.
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