Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....60..389b&link_type=abstract
Astronomy and Astrophysics, vol. 60, no. 3, Sept. 1977, p. 389-392. Research supported by the Deutsche Forschungsgemeinschaft.
Astronomy and Astrophysics
Astrophysics
2
Chromium, Error Analysis, Molecular Oscillators, Transition Probabilities, Angular Momentum, Eigenvectors, Electric Dipoles, Least Squares Method
Scientific paper
Theoretical Hartree-Fock oscillator strengths for Cr I calculated by Froese Fischer (1973) and semiempirical values computed by Biemont (1974) and by Kurucz and Peytremann (1975) are inconsistent with the recent measured values of Bieniewski (1976) and Becker et al. (1977). It is shown that the Froese Fischer and Biemont calculations have a phase error that leads to an overestimate of the gf-values. Kurucz and Peytremann incorrectly assigned two terms in their least-squares determination of the eigenvectors, which resulted in an underestimate of the gf-values for two of the lines. When these errors are corrected, there is approximate agreement between theory and measurement. Additional radial integrals have been determined by a fit to experimental line strengths and are compared with the theoretical values of other authors.
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