rooted in the Atomic, Quantum & Fundamental Physics Division of the GSI Helmholtz Centre in Darmstadt . The group is working together with the Helmholtz-CAS Joint Research Group and the SPARC Detectors Group [...] the major strength of GSI Helmholtz Centre for Heavy Ion Research which offers access to stored and cooled stable and radioactive highly charged ions. Furthermore, a variety of trapping and storage-ring devices [...] helium targets, and to nearly unity detection efficiency of reaction products. Furthermore, electron cooling of ion beams fixes the beam energy which is essential if narrow resonances are looked for. After