Correlation states of ethylene

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Abstract
High resolution synchrotron photoelectron spectra (PES) of ethylene have been obtained at several photon energies in the range 30 to 220 eV. Further evidence is presented that the correlation (satellite) peak at 27.4 eV binding energy is ‘‘intrinsic’’ in nature. A new correlation peak at 21.4 eV binding energy, however, is found to be a ‘‘dynamic’’ correlation. Several PES of 1‐13C‐ethylene have also been obtained and have been found to be identical to those of normal ethylene. Both of the correlation peaks are also present in the labeled species with similar photon energy behaviors. Sophisticated theoretical calculations are found to agree quantitatively with the experimental PES spectra.