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

ID: 475209.0, Fritz-Haber-Institut / Molecular Physics
Interatomic Coulombic Decay following Photoionization of the Helium Dimer:
Observation of Vibrational Structure
Authors:Havermeier, T.; Jahnke, T.; Kreidi, K; Wallauer, R; Voss, S; Schöffler, M; Schössler, S; Foucar, L; Neumann, N; Titze, J; Sann, H; Kühnel, M.; Voigtsberger, J.; Morilla, J. H.; Schöllkopf, Wieland; Schmidt-Böcking, H.; Grisenti, R. E.; Dörner, R.
Date of Publication (YYYY-MM-DD):2010-04-02
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Start Page:133401-1
End Page:133401-4
Copyright:2010 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Using synchrotron radiation we simultaneously ionize and excite one helium atom of a helium dimer (He₂) in a shakeup process. The populated states of the dimer ion [i.e., He*⁺(n=2,3)-He] are found to deexcite via interatomic Coulombic decay. This leads to the emission of a second electron from the neutral site and a subsequent Coulomb explosion. In this Letter we present a measurement of the momenta of fragments that are created during this reaction. The electron energy distribution and the kinetic energy release of the two He⁺ ions show pronounced oscillations which we attribute to the structure of the vibrational wave function of the dimer ion.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
External Affiliations:Institut für Kernphysik, J.W. Goethe Universität, Max-von-Laue-Straße 1, 60438 Frankfurt, Germany;
Instituto de Estructura de la Materia, CSIC Serrano 121, 28006 Madrid, Spain;
GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
Identifiers:URL:http://link.aps.org/doi/10.1103/PhysRevLett.104.13... [only subscriber]
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