29.01.19, Andreas Hans "Multidimensional photon spectroscopy: Investigation of electronic processes in atoms, molecules and clusters"

 

Photon spectroscopy is a powerful method in atomic and molecular physics, allowing the identification and qualitative and quantitative characterization of a vast variety of decay mechanisms of excited quantum systems. The diverse capabilities of this method develop in multidimensional experiments, for example, if photon spectra are recorded in dependence of experimental parameters or in combination with other particles. In this seminar, I will give an overview of multidimensional photon-induced fluorescence spectroscopy. Here, synchrotron radiation is used for site- and stateselective electronic excitation of various targets and fluorescence spectroscopy is applied to investigate the subsequent relaxation. A particular focus will be the identification and characterization of non-local decay processes in weakly bound clusters. As an outlook, I will discuss the inclusion of photon detection in advanced experimental techniques like charged particle coincidence spectroscopy.