Photoionization of Ions at the PETRA III Synchrotron Light Source
报告题目：Photoionization of Ions at the PETRA III Synchrotron Light Source
报告人：Prof. Dr. Stefan Schippers
Justus-Liebig-University Giessen Institute of Experimental Physics
Atomic and Molecular Physics
Experiments on photon-ion interactions are technically challenging because of the low particle densities of ionic targets which are orders of magnitude lower than the typical densities of neutral gas targets. The photon-ion merged-beams technique partly makes up for the low target density by providing an elongated interaction volume and a high detection efficiency of heavy photoproducts. In recent years, a consortium of German university groups has implemented the photon-ion merged-beams method at the world’s currently brightest 3rd generation synchrotron light source, i.e., PETRA III at DESY in Hamburg, Germany. The new photon-ion spectrometer at PETRA III (PIPE) started operating in 2013 and, since then, a number of studies have been carried out on inner-shell ionization of positively charged atomic ions, atomic anions, small molecular ions, and endohedral fullerene ions. In my talk, I will review these first results from the PIPE setup, which provide intriguing insight into the highly correlated many-particle dynamics that is initiated by the inner-shell ionization of ions.