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2009-06-08 - Article/Dans un journal avec peer-review - Anglais - 9 page(s)

Fivet Vanessa, Quinet Pascal , Palmeri Patrick , Biémont Emile , Asplund M., Grevesse N., Sauval A.J., Engström L., Lundberg H., Hartman H., Nilsson H., "Experimental and theoretical radiative decay rates for highly excited ruthenium atomic levels and the solar abundance of ruthenium" in Monthly Notices of the Royal Astronomical Society, 396, 4, 2124-2132

  • Edition : Blackwell Publishing, Oxford (United Kingdom)
  • Codes CREF : Physique atomique et moléculaire (DI1220), Astrophysique (DI1455), Mécanique quantique classique et relativiste (DI1211)
  • Unités de recherche UMONS : Astrophysique et spectroscopie (S804)
Texte intégral :

Abstract(s) :

(Anglais) 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?471 Å. The new abundance value (in the usual logarithmic scale where the solar hydrogen abundance is equal to 12.00), ARu = 1.72 ± 0.10, is in agreement with the most recent meteoritic result, ARu = 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.

Notes :
  • (Anglais) Lecture en ligne: http://www.mpa-garching.mpg.de/mpa/publications/preprints/pp2009/MPA2555.pdf
Identifiants :
  • DOI : 10.1111/j.1365-2966.2009.14761.x