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New f-values in neutral lead obtained by time-resolved laser spectroscopy, and astrophysical applications

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Author

Summary, in English

Natural radiative lifetimes have been measured for three odd-parity levels of neutral lead using time-resolved UV laser-induced fluorescence from a laser-produced plasma. These new lifetimes, as well as additional recent values obtained by laser spectroscopy, combined with theoretical branching ratios deduced from a relativistic Hartree-Fock calculation taking core polarization effects into account, have allowed the deduction of a new set of accurate f-values of astrophysical interest. Using the new lifetime value for 6p7s (1/2, 1/2)(0)degrees, a refined value of the lead abundance in the solar photosphere is deduced: A(Pb) = 2.00 +/- 0.06 on the usual logarithmic scale, allowing the resolution of the long-standing discrepancy previously observed between the solar photosphere and meteorites.

Department/s

Publishing year

2000

Language

English

Pages

116-122

Publication/Series

Monthly Notices of the Royal Astronomical Society

Volume

312

Issue

1

Document type

Journal article

Publisher

Oxford University Press

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1365-2966