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Radiative lifetimes, branching fractions and transition probabilities in Ge I - solar implications

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Author

  • E Biemont
  • C Lynga
  • Z. S Li
  • Sune Svanberg
  • H. P Garnir
  • P. S Doidge

Summary, in English

New radiative lifetimes have been measured for the 5s (3)P(0,1,2)degrees and 5s (1)P(1)degrees levels of Ge I using a laser-produced plasma subject to selective laser excitation. A diffraction grating based emission spectrometer of moderately high resolution has been used to remeasure the branching ratios of the 4p-5s depopulating transitions. The oscillator strengths of astrophysical interest, which have been derived from these new data, are compared with theoretical values calculated within a pseudo-relativistic Hartree-Fock approach. The new set of f-values has been compared with the few results available in the literature, which are generally characterized by a large scatter and a low accuracy. The solar photospheric abundance of germanium deduced from the new atomic data of the present work is A(Ge) = 3.58 +/- 0.05, on the usual logarithmic scale, in agreement with the meteoritic value.

Department/s

Publishing year

1999

Language

English

Pages

721-726

Publication/Series

Monthly Notices of the Royal Astronomical Society

Volume

303

Issue

4

Document type

Journal article

Publisher

Oxford University Press

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1365-2966