Transitions in L-shell ions of Fe and Ni

Comparison of 1s^2^2l^q^ energies with experimental results shows that the calculation is accurate to within ~0.15eV for these levels. The accuracy of 1s^2^2l^q-1^3l' energies can be slightly worse, at ~0.5eV.

The theoretical wavelengths of 2->3 transitions of iron ions are compared with the published experimental measurements, and discrepancies are found to be mostly within {+/-}10m{AA}. Similar accuracy is expected for wavelengths of nickel ions. Such accuracy is a significant improvement over that obtainable with standard configuration interaction methods.