Relativistic calculations of dielectronic recombination coefficients for the Ne isoelectronic sequence

Physics – General Physics

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High Temperature Plasmas, Ion Recombination, Isoelectronic Sequence, Neon, Recombination Coefficient, Autoionization, Configuration Interaction, Electron Transitions, Ground State, Electron-Ion Scattering, Excitation And Ionization, Auger Effect And Inner-Shell Excitation Or Ionization

Scientific paper

Dielectronic recombination coefficients for ground-state ions of the Ne isoelectronic sequence have been calculated for seven ions, with atomic number between 18 and 54, in the isolated resonance approximation, for temperatures in the range 0.2 and 6 keV. The Auger and radiative rates of each doubly excited state were evaluated explicitly by using the multiconfiguration Dirac-Fock model. The calculations were performed with intermediate coupling. The effect of the configuration interaction was also included for the low-lying doubly excited states. The effect of Coster-Kronig-type transitions on the dielectronic rate coefficients has been found to be very significant for low-Z ions. However, it is quite small for medium and heavy ions. The effect of relativity on the total dielectronic coefficient and dielectronic satellite spectra is also discussed.

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