• Systematic trends in the line strengths of E1 transitions in the oxygen isoelectronic sequence

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      https://www.ias.ac.in/article/fulltext/pram/043/06/0477-0485

    • Keywords

       

      Line strength; oscillator strength; hydrogenic limit; near-degeneracy

    • Abstract

       

      Line strengthsS for the dipole allowed transitions within then=2 complex of the oxygen isoelectronic sequence have been fitted in the formZ2S=A+B/(ZC), whereZ is the nuclear charge of a particular ion. The constantsA, B andC are determined by using a non-linear least square method. The data forS are taken from the configuration interaction calculations which included internal, semi-internal and all external type correlations for ions in the rangeZ=8 − 25. It is shown that the values ofA obtained from the fit for all the transitions are in excellent accord with the ab-initio values obtained in the hydrogenic limitZ → ∞ provided near degeneracy effects are included in the ground state multiplet 1s22s22p41S.

    • Author Affiliations

       

      Anju Agrawal1 K L Baluja1

      1. Department of Physics and Astrophysics, University of Delhi, Delhi - 110 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

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