Investigation of dipole strength at the ELBE accelerator in Dresden-Rossendorf

Systematic studies of the dipole strength in medium mass nuclei took place at the ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf. The facility, which allows experiments with bremsstrahlung up to photon energies of 18 MeV in order to study dipole excitations up to the neutron separation, will be presented as well as current experiments and their results. For the first time a high-pressure gas target has been investigated in Dresden. The talk will give an overview at the example 86Kr over the data analysis and simulation methods, which allow us to deduce the intensity of unresolvable peaks due to decreasing level spacing. Finally the photo-absorption cross section will be presented in the context of further photon-scattering experiments performed in Rossendorf on the stable isotopes at the closed neutron shell N = 50. In addition to this we performed twin experiments at Dresden and the research reactor in Budapest. The states populated in cold neutron capture and photon excitation in the two pairs of 77Se/78Se and 195Pt/196Pt should have the similar parity and spin. For the analysis of these experiments and further investigations of the influence of strength functions and level densities on the deexcitation of excited states a new very fast and extremely statistical code has been developed and will be presented