Abstract
Moderately accurate oscillator strengths are obtained by application of systematic corrections to Warner's-log(gf) for the once ionized elements of the iron group. Corrections are derived by comparison of Warner's values with those of Kurucz-Peytremann (Scii, Tiii,Vii, Crii, Mnii, Coii, and Niii) and Kurucz (Feii).K−P andK derived log(gf) by semi-empirical methods for many transitions using scaled Thomas-Fermi-Dirac potentials for the atoms of the elements from B to Ni. Although their individual values may be seriously in error, it has been shown that their mean scales are acceptable, being affected at most by rather small errors. It is known, for example, that when interacting terms are not properly accounted for in the semi-empirical method, very small values are derived for log(gf); these were dropped away in calculating mean corrections as they exhibited gross deviations.
The relations loggf(KP)−loggf(W) vs λ, loggf(W), andE u (energy of the upper level) have been investigated, and constant corrections, or weak dependences are found.
Using Warner's corrected log(gf) for these elements, we have shown in a rather qualitative way that abundances consistent with the values accepted at present are found in the solar photosphere.
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Research supported in part by the SECYT.
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Milone, L.A., Milone, A.A.E. Log(gf) for singly-ionized elements of the iron group. Astrophys Space Sci 107, 303–312 (1984). https://doi.org/10.1007/BF00653534
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DOI: https://doi.org/10.1007/BF00653534