Abstract
Solar abundances have been derived for Pb, Bi, Th and U. For the three first elements, the abundances are determined from the profiles of their lines obtained with the high resolution solar spectrometer installed at the Jungfraujoch Scientific Station (Switzerland) and from new oscillator strengths based on life-time measurements (Pb and Bi). The possible presence of U in the solar spectrum is also examined.
Our results are (in the log N H = 12.00 scale): logN Pb = 1.83, logN Bi ⩽ 0.80, logN Th = 0.82, and logN U ⩽ 0.60.
The meaning of these new solar abundances is discussed from the point of view of the nucleosynthesis theories.
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This work has been sponsored in part by the Air Force Cambridge Research Laboratories, OAR, through the European Office of Aerospace Research, U.S.A.F., under Contract AF 61 (052)-955 and by the ‘Comité National Belge de la Coopération Géophysique Internationale’ (C.N.B.C.G.I.).
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Grevesse, N. Abundances of heavy elements in the sun. Sol Phys 6, 381–398 (1969). https://doi.org/10.1007/BF00146472
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DOI: https://doi.org/10.1007/BF00146472