Figure 2
From: Accurate Electron Affinity of Iron and Fine Structures of Negative Iron ions
Energy levels of Fe and Fe− related to the present measurement.
The ground state of Fe is 3d64s2 5D4. The ground state of Fe− is 3d74s2 4F9/2. The labels of each transition are the indexes of the observed peaks in Fig. 1. The transition d is used for the electron affinity measurement.
