SAMOP 2021 – scientific programme

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A: Fachverband Atomphysik

A 5: Atomic clusters (together with MO)

A 5.6: Poster

Tuesday, September 21, 2021, 16:30–18:30, P

Investigation of virtual photon dissociation in van der Waals clusters by electron photon spectroscopy — •Carolin Honisch, Nils Kiefer, Dana Bloß, Catmarna Küstner-Wetekam, Lutz Marder, Arno Ehresmann, and Andreas Hans — Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany

Within the natural environment, atoms or molecules do not occur in isolation and the influence of the presence of neighboring atoms or molecules is of high interest. A good prototypical system for this situation is represented by van der Waals clusters. In recent years, several novel processes have been discovered to occur in these weakly bound systems that are discussed to play an important role in the study of radiation damage due to charge or energy transfer to distant neighbors and subsequent slow electron emission. Within this context, the process of virtual photon dissociation was also predicted, in which ionization or excitation of an atom or molecule followed by energy transfer can dissociate a neighboring molecule. Here we present a scheme to experimentally detect this process using the coincident detection of electrons and photons. For this purpose, we use a setup developed for electron-photon coincidence experiments, which has been successfully used for experiments of this kind recently.