Welcome to the ICD resarch unit page!


The topic of this research unit is the investigation of a novel, recently discovered mechanism for the transformation of electronic energy created by excitation or ionization with radiation in the UV and far beyond, or with energetic particles. In addition to photoemission from an excited atom and the emission of an Auger-electron, Intermolecular or Interatomic Coulombic Decay provides a third, additional decay mechanism, which is alternative to fluorescence for low excitation energies, and to emission of an Auger electron for more highly excited states. ICD is not a resonant process, and is therefore expected to occur under general conditions. Thus it is expected to find ICD in many systems and configurations.


Putting ICD in a broader context, it bridges the gap between fundamental research on the correlated motion of electrons and nuclei and more applied research, for example, on the influence of low kinetic energy electrons in radiation chemistry. In this research unit we expect to contribute not only exciting experiments on the ultrafast dynamics of the electronic cloud but also new ideas directed towards new fields of application.


This research unit is a collaboration of the leading scientists in ICD in Germany and Austria from Goethe-Universität Frankfurt, Universität Innsbruck, Universität Heidelberg, Universität Hamburg, Max-Planck-Institut für Plasmaphysik and Helmholtz Zentrum Berlin [More].







Recent News



12.01.2014 - ICD Summer School in 2014

In 2014 the ICD Research Group will organize a Summer School which will take place at the "Physik-Zentrum Bad Honnef" during September. More information on the topics and the agenda will be presented here shortly.


Place: Physik-Zentrum Bad Honnef

Time: Monday 01/09/2014 to Friday 05/09/2014

12.01.2014 - New ICD Papers in Nature

Resonant Auger decay driving intermolecular Coulombic decay in molecular dimers
      F. Trinter, M. S. Schöffler, H.-K. Kim, F. P. Sturm, K. Cole, N. Neumann, A. Vredenborg, J. Williams, I. Bocharova, R. Guillemin, M. Simon, A. Belkacem, A. L. Landers, Th. Weber, H. Schmidt-Böcking, R. Dörner and T. Jahnke
      Nature (2013)
    DOI: 10.1038/nature12927


    Site- and energy-selective slow-electron production through intermolecular Coulombic decay

    Kirill Gokhberg, Přemysl Kolorenč, Alexander I. Kuleff and Lorenz S. Cederbaum
      Nature (2013)
        DOI: 10.1038/nature12936


      6.12.2013 - Frankfurt Group publishes new Paper in PRL

      Vibrationally Resolved Decay Width of Interatomic Coulombic Decay in HeNe

      F. Trinter, J. B. Williams, M. Weller, M. Waitz, M. Pitzer, J. Voigtsberger, C. Schober, G. Kastirke, C. Müller, C. Goihl, P. Burzynski, F. Wiegandt, R. Wallauer, A. Kalinin, L. Ph. H. Schmidt, M. S. Schöffler, Y.-C. Chiang, K. Gokhberg, T. Jahnke, and R. Dörner

      Phys. Rev. Lett. 111, 233004 (2013)

      DOI: 10.1103/PhysRevLett.111.233004

      Link: http://link.aps.org/doi/10.1103/PhysRevLett.111.233004


      We investigate the ionization of HeNe from below the He 1s3p excitation to the He ionization threshold. We observe HeNe+ ions with an enhancement by more than a factor of 60 when the He side couples resonantly to the radiation field. These ions are an experimental proof of a two-center resonant photoionization mechanism predicted by Najjari et al. [Phys. Rev. Lett. 105, 153002 (2010)]. Furthermore, our data provide electronic and vibrational state resolved decay widths of interatomic Coulombic decay in HeNe dimers. We find that the interatomic Coulombic decay lifetime strongly increases with increasing vibrational state.