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Caption
Left: Change in the energy shift of the Fe Kα and Kβ emission lines relative to neutral iron as a function of ionization state, together with a schematic illustration of the line emission process. The figure shows that as electrons are removed from the 3d orbital, the energy of the Fe Kα emission line decreases.
Top right: Radial electron density distributions for each atomic orbital. Bottom right: Schematic illustration of the contraction of the 3d orbital with increasing ionization state.
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(Higgs Tan)
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