Orbital sensitivity in Mg2+ dielectronic recombination calculations

摘要: We have investigated the reason for significant discrepancies between results of two recent, similar computational methods [Zatsarinny et al., Astron. Astrophys. 426, 699 (2004); Gu, J. 590, 1131 (2003)] dielectronic recombination (DR) Mg2+. It is found that choice orbital description can lead to by as much a factor 2 total peak DR rate coefficients resulting from otherwise-identical computations. These unexpected differences are attributed large sensitivity bound-orbital relaxation and continuum-orbital effects on computed radiative autoionizing transitions arising accidental cancellation. In order obviate these effects, an approach, using separate, nonorthogonal basis each configuration, employed yield coefficient we assess be more reliable than all earlier published results.