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キーワード:
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要旨:
It is shown experimentally that the pronounced satellite peaks (shakeup) seen in the core level spectra of transition metal carbonyls borrows intensity from the main line. The core level spectra of free uncoordinated molecules like CO, N2, O2, NO, and CO2 and transition metal carbonyls like Fe(CO)5 can be understood using simple intensity sum rules based on the sudden approximation. By applications of the "Manne–Aberg theorem," we are able to explain binding energy shifts that occur upon coordination of a molecule as effects due to relaxation in the ion rather than to initial state shifts. The importance of the shakeoff continuum is addressed. Finally, a comparison of the satellite energies and positions is made to the excitation spectra of the neutral molecule. A CNDO/2–CI calculation is used to support the conclusions based upon this comparison.
