Dielectronic recombination rates, ionization equilibrium, and radiative emission rates for calcium and nickel ions in low-density high-temperature plasmas

Details Dielectronic recombination rates, ionization equilibrium, and radiative emission rates for calcium and nickel ions in low-density high-temperature plasmas Dielectronic recombination rates, ionization equilibrium, and radiative emission rates for calcium and nickel ions in low-density high-temperature plasmas

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239.1119j&link_type=abstract

Astrophysical Journal, Part 1, vol. 239, Aug. 1, 1980, p. 1119-1130. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

77

High Temperature Plasmas, Metal Ions, Metallic Plasmas, Plasma Diagnostics, Plasma Spectra, Radiative Recombination, Calcium, Electron Recombination, Nickel, Plasma Density, Plasma Equilibrium, Transition Probabilities, X Ray Spectra

Scientific paper

The total dielectronic recombination rates for Ca and Ni ions were calculated taking into account autoionization to excited states of the recombining ion and stabilizing radiative transitions of the recombining electron. Radiative transitions of the recombining ion are found to be the dominant stabilizing processes, and the relative importance of Delta n = 0 and Delta n not equal to 0 transitions in the relevant temperature region is determined for each ion. The relative importance of the Delta n = 0 and Delta n not equal to 0 contributions is significantly altered for some ions by the inclusion of autoionization to excited levels. The relative abundance of the various ionization stages has been determined by using a corona equilibrium model in which collisional ionization and inner-shell excitation followed by autoionization are balanced by direct radiative and dielectronic recombination.

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