Hydrogen bonding in liquid water probed by resonant Auger-electron spectroscopy

Winter, B.; Hergenhahn, U.; Faubel, M.; Björneholm, O.; Hertel, I. V.

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Hydrogen bonding in liquid water probed by resonant Auger-electron spectroscopy

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Faubel, M.
Group Spectroscopy of aqueous surfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Winter, B., Hergenhahn, U., Faubel, M., Björneholm, O., & Hertel, I. V. (2007). Hydrogen bonding in liquid water probed by resonant Auger-electron spectroscopy. Journal of Chemical Physics, 127(9): 094501. Retrieved from 10.1063/1.2770457.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-13FD-E

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.