EDP Sciences
Free Access
Volume 385, Number 2, April II 2002
Page(s) 724 - 732
Section Atomic and molecular data
DOI https://doi.org/10.1051/0004-6361:20020148

A&A 385, 724-732 (2002)
DOI: 10.1051/0004-6361:20020148

Measurement of lifetimes by laser-induced fluorescence and determination of transition probabilities of astrophysical interest in Nd III

Z. G. Zhang1, S. Svanberg1, P. Palmeri2, P. Quinet2, 3 and E. Biémont2, 3

1  Department of Physics, Lund Institute of Technology, PO Box 118, 22100 Lund, Sweden
2  Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium
3  IPNAS, Bât. B15, Université de Liège, Sart Tilman, 4000 Liège, Belgium

(Received 04 July 2001 / Accepted 20 December 2001)

Selective lifetime measurements by time-resolved laser-induced fluorescence spectroscopy for 5 levels belonging to the 4f 35d configuration of doubly ionized neodymium provide a first and useful experimental test of the relativistic Hartree-Fock calculations in this ion of astrophysical interest. As a consequence, the accuracy of the transition probabilities deduced in the present work is well assessed. These new data are expected to help astrophysicists in the future to refine the analysis of the composition of chemically peculiar stars which frequently show large overabundances of lanthanides when compared to the solar system standards.

Key words: atomic data -- atomic processes -- stars: chemically peculiar

Offprint request: E. Biémont, E.Biemont@ulg.ac.be

SIMBAD Objects in preparation

© ESO 2002