Physics with synchrotron radiation

Since the discovery of the matter-dependency of the emitted and absorbed radiation in the 19th century the detection of the characteristic emitted light after excitation of atomic and molecular systems has been proven to be a powerful tool to investigate the properties of these systems. The investigation of the emission spectra of emitted photons after photon-excitation (fluorescence spectra) are inevitable to understand processes within the excited systems, which do not (only) result in the emission of particles. Additionally the tested system is not further disturbed by the measurement of the fluorescence photons.

One focus of interest in the experimental physics work group IV is the investigation of different gaseous systems after the excitation by synchrotron radiation provided by synchrotron radiation facilities (e.g. BESSY II, PETRA III, DORIS III) via their fluorescence spectra with high resolution spectrometers. The investigated systems are ranging from single-atom gases over few-atom molecules to larger (chiral) molecules and clusters. The well determined properties and excellent tunability plus high brilliance of the chosen photon energy provided by synchrotrons together with the high resolution of our spectrometer allows us to receive highly resolved fluorescence spectra. To examine further physical properties and effects of interest experimental setups are developed, allowing measurements of fluorescence spectra with well-defined parameters and meeting the conditions to be used at the synchrotron facilities.