Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.303..721b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 303, Issue 4, pp. 721-726.
Astronomy and Astrophysics
Astronomy
12
Atomic Data, Methods: Laboratory, Methods: Numerical, Sun: Abundances
Scientific paper
New radiative lifetimes have been measured for the 5s ^3P^o_0,1,2 and 5s ^1P^o_1 levels of GeI 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.
Biémont É.
Doidge P. S.
Garnir H. P.
Li Selina Z.
Lynga C.
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