Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the spin-flip transition in

A first performance test of the Coulomb excitation multipolarimetry (Coulex-multipolarimetry ) method is presented. It is based on a spin-flip experiment performed as part of the PreSPEC-AGATA campaign at the GSI Helmholtzzentrum fur Schwerionenforschung (GSI). Via determination of background levels around the expected excitations as well as measured excitations, an upper limit for the M 1 transition strength of the transition in and a lower beam time limit for upcoming experimental campaigns utilizing Coulex-multipolarimetry have been inferred. The impact of the use of AGATA in its anticipated configuration on these estimates is deduced via Geant4 simulations.