Nonmonotonic behavior as a function of nuclear charge of the K-shell Auger and radiative rates and fluorescence yields along the 1s2s(2)2p(3) isoelectronic sequence

M.F. Hasoglu, D. Nikolic, T.W. Gorczyca, S.T. Manson, M.H. Chen, N.R. Badnell

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Calculations using multiconfiguration Breit-Pauli and multiconfiguration Dirac-Fock methodologies have revealed that the radiative and Auger rates, and the associated fluorescence yields, of the six electron 1s2s(2)2p(3) K-shell vacancy isoelectronic sequence exhibit nonmonotonic behavior as a function of nuclear charge Z. This behavior is explained in terms of an accidental degeneracy, an avoided crossing of two nearly degenerate spin-orbit coupled levels. The results also demonstrate the importance of including both electron-electron correlation and spin-orbit effects even at low Z.
Original languageEnglish
Pages (from-to)032509-1-032509-6
JournalPhysical Review A
Issue number3
Publication statusPublished - Sep 2008


  • x-ray emission
  • dielectronic recombination
  • configuration interaction
  • theoretical calculations
  • laboratory measurements
  • core excitations
  • transition rates
  • vacancy states
  • coster kronig

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