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A complete set of level energies, wavelengths, A-values, and total and partial Auger rates have been computed for transitions involving the K-vacancy states within the n= 2 complex of Fe xviii-Fe xxv. Three dierent standard numerical packages are used for this purpose, namely autostructure, the Breit-Pauli R-matrix suite (bprm )a ndhfr, which allow reliable estimates of the physical eects involved and of the accuracy of the resulting data sets. The Breit interaction is taken into account because its contributions to the small A-values and partial Auger rates cannot be neglected with increasing electron occupancy. Semiempirical adjustments can also lead to large dierences in both the radiative and Auger decay data of strongly mixed levels. Several experimental level energies and wavelengths are questioned, and significant discrepancies are found with previously computed decay rates that are attributed to numerical problems. The statistical accuracy of the present level energies and wavelengths is ranked at 3e V and2 mA, respectively, and that for A-values and partial Auger rates greater than 10 13 s 1 at better than 20%.

A complete set of radiative and Auger rates for K-vacancy states in Fe XVIII–Fe XXV