ALKALI-METAL OXIDES - OCCUPIED, UNOCCUPIED AND EXCITED-STATES

The occupied and unoccupied electronic states of NaO//2 and KO//2 have been investigated by UV photoemission spectroscopy and inverse photoemission spectroscopy, respectively. In addition single electron excitations from occupied into empty levels have been probed by x-ray absorption and electron energy loss spectroscopy. The experimental data are augmented by LCGTO-X alpha model cluster calculations. A detailed assignment of initial and final states is given. The excitation cross sections and an inversion of the ligand field induced 3d level splitting in NaO//2 are discussed.