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  • Title: Hydrogen bonding in liquid water probed by resonant Auger-electron spectroscopy.
    Author: Winter B, Hergenhahn U, Faubel M, Björneholm O, Hertel IV.
    Journal: J Chem Phys; 2007 Sep 07; 127(9):094501. PubMed ID: 17824742.
    Abstract:
    We have measured resonant and off-resonant Auger-electron spectra of liquid water. Continuumlike transitions near and above the O1s vertical ionization energy are identified by the characteristic normal Auger-electron spectra. On the contrary, well-resolved spectator shifts of the main Auger-electron peak are observed at the liquid-water O1s absorption main edge and near the absorption pre-edge. The shifts of 1.4 and 1.9 eV arise from the localized nature of the excitation. Excited-state localization/delocalization is also discussed for the analogous vacuum ultraviolet (VUV) transitions, and we point out the similarities between x-ray and VUV absorption spectra of liquid water.
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