Experimental and theoretical radiative decay rates for highly excited ruthenium atomic levels and the solar abundance of ruthenium |
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| Authors: | V Fivet P Quinet P Palmeri É Biémont M Asplund N Grevesse A J Sauval L Engström H Lundberg H Hartman H Nilsson |
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| Institution: | Astrophysique et Spectroscopie, Universitéde Mons-Hainaut, B-7000 Mons, Belgium;IPNAS, Universitéde Liège, B15 Sart Tilman, B-4000 Liège, Belgium;Max Planck Institute for Astrophysics, Postfach 1317, D-85741 Garching, Germany;Centre Spatial de Liège, Avenue PréAily, B-4031 Angleur-Liège and Institut d'Astrophysique et de Géophysique, Universitéde Liège, Allée du 6 Août, 17, B5C, B-4000 Liège, Belgium;Observatoire Royal de Belgique, Avenue Circulaire, 3, B-1180 Bruxelles, Belgium;Department of Physics, Lund University, PO Box 118, SE-221 00 Lund, Sweden;Lund Observatory, Lund University, PO Box 43, SE-221 00 Lund, Sweden |
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| Abstract: | The solar photospheric abundance of ruthenium is revised on the basis of a new set of oscillator strengths derived for Ru i transitions with wavelengths in the spectral range 2250–4710 Å. The new abundance value (in the usual logarithmic scale where the solar hydrogen abundance is equal to 12.00), A Ru= 1.72 ± 0.10 , is in agreement with the most recent meteoritic result, A Ru= 1.76 ± 0.03 . The accuracy of the transition probabilities, obtained using a relativistic Hartree–Fock model including core-polarization effects, has been assessed by comparing the theoretical lifetimes with previous experimental results. A comparison is also made with new measurements performed in this work by the time-resolved laser-induced fluorescence spectroscopy for 10 highly excited odd-parity levels of Ru i . |
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| Keywords: | atomic data atomic processes Sun: abundances |
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