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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



  history
ID: 446903.0, Fritz-Haber-Institut / Molecular Physics
A hitherto unrecognized source of low-energy electrons in water
Authors:Mucke, Melanie; Braune, Markus; Barth, Silko; Förstel, Marko; Lischke, Toralf; Ulrich, Volker; Arion, Tiberiu; Becker, Uwe; Bradshaw, Alex; Hergenhahn, Uwe
Language:English
Date of Publication (YYYY-MM-DD):2010-02
Title of Journal:Nature Physics
Volume:6
Start Page:143
End Page:146
Copyright:© 2010 Nature Publishing Group, a division of Macmillan Publishers Limited.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Low-energy electrons are the most abundant product of ionizing radiation in condensed matter. The origin of these electrons is most commonly understood to be secondary electrons1 ionized from core or valence levels by incident radiation and slowed by multiple inelastic scattering events. Here, we investigate the production of low-energy electrons in amorphous medium-sized water clusters, which simulate water molecules in an aqueous environment. We identify a hitherto unrecognized extra source of low-energy electrons produced by a non-local autoionization process called intermolecular coulombic decay2 (ICD). The unequivocal signature of this process is observed in coincidence measurements of low energy electrons and photoelectrons generated from inner-valence states with vacuum-ultraviolet light. As ICD is expected to take place universally in weakly bound aggregates containing light atoms between carbon and neon in the periodic table2,3, these results could have implications for our understanding of ionization damage in living tissues.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
External Affiliations:Max-Planck-Institut für Plasmaphysik, EURATOM Association, Boltzmannstr. 2, 85748 Garching, Germany;
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany;
Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany
Identifiers:URL:http://www.nature.com/nphys/journal/v6/n2/abs/nphy...
DOI:10.1038/nphys1500
ISSN:1745-2473
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