Is a Shake up Process Responsible for the Multi-peak Structure of the X-ray Photoelectron Spectra of Metal Hexacarbonyls?

There is no doubt that ESCA studies will be very helpful in understanding the structure of organometallic compounds. This is for example demonstrated by the recent study of J0RGENSEN 1 . We feel, however, that before we can make much progress in photoelectron spectral studies of many compounds, we must first get a clear idea of the basic phenomena which occur during photoelectron ejection in some very simple compounds. This is to avoid basically wrong interpretations of early results, a danger in the infancy of any new technique, which could hinder the proper development of photoelectron spectroscopy for a long time.