Welcome to the ICD research 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



01.08.2015 - Dr. Joshua Williams accepts Assistant Professor position at University of Nevada Reno

Joshua Williams, postdoc in the Jahnke group, accepts an offer for an Assistant Professor position at the University of Nevada Reno. He will start his own research group and continue to collaborate with the Research Unit on ICD.


01.08.2015 - Dr. Uwe Hergenhahn joins the Leibniz-Institute for Surface Modification (IOM)

The chemical department of the IOM (Prof. Bernd Abel) and the former IPP group (Dr. Uwe Hergenhahn) agreed to jointly investigate ICD in liquids and on surfaces.


Uwe Hergenhahn


21.10.2014 - ICD Summer School in 2014

All talks and posters are now available for download on summer school page.


27.05.2014 - new paper from Heidelberggroup on ETMD

Enhanced One-Photon Double Ionization of Atoms and Molecules in an Enviroment of Different Species



07.05.2014 - DAMOP 2014 FOCUS Session on ICD

APS 45th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics



16.04.2014 - Dr. Annika Bande rewarded with Freigeist-Fellowship

Dr. Annika Bande, University Heidelberg, Physikalisch-Chemisches Institut, gets Freigeist-Fellowship.

The fellowship is granted to Dr. Bande for her work on ultrafast Energy Transfer Processes in Clusters of Real and Artificial Atoms Induced by Long-Range Electron Correlation. The Freigeist-fellowship is funded by the Volkswagenstiftung to support excellent postdocs. Press release