Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Cluster III (joint session MO/A)
MO 19.3: Vortrag
Donnerstag, 14. März 2019, 11:15–11:30, S HS 001 Biologie
Interspecies energy transfer in heterogeneous Ar2-N2 clusters quenching predissociation — •Huda Otto, Dana Bloß, Andreas Hans, Xaver Holzapfel, Catmarna Küstner-Wetekam, Christian Ozga, Philipp Schmidt, Arno Ehresmann, and André Knie — Institut für Physik und Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
Loosely bound systems, like Ar2, are of technical and biological interest. For example, the Ar dimer (Ar2) is used as a medium in excimer lamps, and decay processes in such noble gas dimers are showcase examples to explain radiation damage in organic tissues. Ar2 consists of two van-der-Waals bound Ar atoms. This binding type affects the energy transfer between van-der-Waals bound atoms, called clusters. Doping an Ar cluster with a molecule, like N2, allows to investigate the effect of molecular vibrations on energy transfers in a loosly bound environment. Here, different vibronic states of N2 in an Ar2-N2 cluster were addressed. In gaseous N2 the resonant excitation of these vibronic states lead to non-radiative predissociation, whereas if the N2 is van-der-Waals bound on an Ar cluster, the absorbed energy is redistributed within the cluster, resulting in photon emission from perturbed Ar dimers. Thus, an interspecies energy transfer from a N2 molecule to an Ar dimer must occur. During the talk evidences for the interspecies energy transfer in heterogeneous Ar2-N2 clusters will be discussed further.