Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 31: Poster Session III

A 31.38: Poster

Thursday, March 9, 2017, 17:00–19:00, P OG1

Evidence for direct observation of radiative charge transfer photons in noble gas clusters — •Andreas Hans, Xaver Holzapfel, Philipp Schmidt, Christian Ozga, Sascha Apazeller, Catmarna Küstner-Wetekam, Arno Ehresmann, and André Knie — Institut für Physik and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany

The environment of an atom is essential for the decay possibilities of excited states. If an atom is bound in a cluster, possible intra-atomic relaxation processes must be extended by several non-local processes like Interatomic Coulombic Decay (ICD) and Electron Transfer Mediated Decay (ETMD). However, fast processes like Auger decay can still happen locally and create doubly charged sites within a cluster. Because a one-site doubly-charged state possesses a much higher potential energy than a two-site singly-charged state, the system can relax by the transfer of an electron from a neutral atom to the doubly charged site. In this Radiative Charge Transfer (RCT), the excess energy is emitted as a photon. The process has been observed several times in the form of lacking energy in electron-ion-coincidence experiments. Here, we present evidence for the direct measurement of the emitted photons from noble gas clusters.