Abstract
Dielectronic data for state-specific F-like to Ne-like recombinations are obtained for elements between argon and krypton (and perhaps somewhat beyond). The data consist of energy levels, autoionization rates, radiative rates, and dielectronic-recombination branching ratios. Detailed calculations using a Hartree-Fock method that includes relativistic corrections, but no configuration interactions, were carried out for ${\mathrm{Ar}}^{9+}$, ${\mathrm{Ti}}^{13+}$, ${\mathrm{Fe}}^{17+}$, and Se $^{25+}$. Three- and four-parameter fits were then made to these data enabling one to calculate dielectronic rates for all elements in the fourth row of the periodic table. These scaling relations provide checks on the accuracy of the numerical methods used to obtain the Ar, Ti, Fe, and Se data. Further checks are provided by comparisons made to other published work. The dielectronic-recombination rates presented in this paper are very important in the calculation of population inversions and x-ray laser gain within neonlike ionization stages.
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More From: Physical review. A, Atomic, molecular, and optical physics
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