Single Photon Double Ionization of the Helium Dimer

T. Havermeier, T. Jahnke, K. Kreidi, R. Wallauer, S. Voss, M. Schöffler, S. Schössler, L. Foucar, N. Neumann, J. Titze, H. Sann, M. Kühnel, J. Voigtsberger, A. Malakzadeh, N. Sisourat, W. Schöllkopf, H. Schmidt-Böcking, R. E. Grisenti, and R. Dörner
Phys. Rev. Lett. 104, 153401 – Published 14 April 2010

Abstract

We show that a single photon can ionize the two helium atoms of the helium dimer in a distance up to 10 Å. The energy sharing among the electrons, the angular distributions of the ions and electrons, as well as comparison with electron impact data for helium atoms suggest a knockoff type double ionization process. The Coulomb explosion imaging of He2 provides a direct view of the nuclear wave function of this by far most extended and most diffuse of all naturally existing molecules.

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  • Received 1 December 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.153401

©2010 American Physical Society

Authors & Affiliations

T. Havermeier1, T. Jahnke1, K. Kreidi1, R. Wallauer1, S. Voss1, M. Schöffler1, S. Schössler1, L. Foucar1, N. Neumann1, J. Titze1, H. Sann1, M. Kühnel1, J. Voigtsberger1, A. Malakzadeh1, N. Sisourat2, W. Schöllkopf3, H. Schmidt-Böcking1, R. E. Grisenti1,4, and R. Dörner1,*

  • 1Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Straße 1, 60438 Frankfurt, Germany
  • 2Institut für physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
  • 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
  • 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany

  • *doerner@atom.uni-frankfurt.de

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Vol. 104, Iss. 15 — 16 April 2010

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