Double core-hole electron spectroscopy for open-shell molecules: theoretical perspective

Details Double core-hole electron spectroscopy for open-shell molecules: theoretical perspective Double core-hole electron spectroscopy for open-shell molecules: theoretical perspective

2010-07-04

arxiv.org/abs/1007.0530v1

Physics

Chemical Physics

17 pages. To appear in Chem.Phys.Lett

Scientific paper

We have theoretically investigated the double core-hole (DCH) states of the open-shell molecules and examined the possibility of DCH spectroscopy by means of X-ray two-photon photoelectron spectroscopy (XTPPS). Energies of many DCH states were obtained by the CASSCF calculations and the generalized intra- and interatomic relaxation energies were evaluated. We show that XTPPS can extract these quantities by the measurement of single and double core-hole ionization potentials. We discuss the influence of chemical environment on the DCH states with two holes at the same atomic site and at two different atomic sites.

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