Forbidden Transitions of Fe II

Predicted wavelengths for 281 forbidden transitions in Fe II in the range 3 000-12 000 Å, based on a recalculation of the energy level system, are tabulated. For each transition are given, in addition to the wavelength, the excitation potential of the upper level, the transition probability earlier calculated by Garstang, a provisional value of the expected relative intensity and an estimated uncertainty of the predicted wavelength. Some 90 of the strongest lines are collected in a separate finding list arranged by wavelength.