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A: Atomphysik
A 17: Posters Friday (Spectroscopy)
A 17.48: Poster
Freitag, 6. April 2001, 12:30–15:00, AT3
Atomic transition probabilities in Bi II — •Patrick Palmeri1, Pascal Quinet1,2, and Emile Biémont1,2 — 1Astrophysique et Spectroscopie, UMH, Belgium — 2IPNAS, Université de Liège, Belgium
Using the Hartree-Fock method with relativistic corrections and the
multiconfiguration Dirac-Fock fully relativistic approach, a detailed
analysis of Bi II transition probabilities of astrophysical interest is
presented. The relativistic Hartree-Fock approximation, combined with a
least-squares fitting procedure, as well as the highly systematic
restrictive active space approach coded in GRASP92, have been applied to
this complex heavy ion and have allowed to predict gf-values probably
accurate within a few percent. The importance of both correlation and
relativistic effects is stressed. The good agreement between the two sets
of data is an argument in favour of these new results and throws some light
upon the accuracy accessible in calculations of this type. Detailed
comparisons with previous experimental or theoretical data, when available,
are also considered and some discrepancies theory - experiment are
tentatively explained.
Acknowledgements
EB, PQ and PP are respectively Research Director, Research
Associate and Postdoctoral Researcher of the Belgian National
Fund for Scientific Research (FNRS).