Electron-ion recombination in the close-coupling approximation

A computational formalism is presented to obtain total electron-ion recombination cross sections and rate coefficients employing the close-coupling approximation for photoionization and scattering and the Bell and Seaton theory of dielectronic recombination. The results differ significantly from separate treatments of the two processes, radiative and dielectronic recombination. The R-matrix method, as developed for the Opacity Project, is used and results are presented for recombination collision strengths and rate coefficients for boronlike O²⁺ and Ne⁴⁺