The new photoactivation facility at the 4.3 MV Stuttgart DYNAMITRON: setup, performance, and first applications

Abstract At the Stuttgart 4.3 MV D YNAMITRON accelerator a new bremsstrahlung irradiation facility was installed for photoactivation experiments to complement the well-established arrangement for systematic photon-scattering studies taking advantage of the high photon fluxes achievable at this high-current accelerator. The population or depopulation of isomeric states in low-energy photon-induced reactions ( E γ =0.5– 4.0 MeV ) can be studied with sensitivities far beyond previous limits. The setup of this facility, its performance, and the absolute calibrations are described in detail. First exemplary results for a test case, the reaction 115 In ( γ , γ ′) 115 m In , are presented and analyzed in combination with data from low-energy photon-scattering experiments ( 115 In ( γ , γ ′) 115 In ). The quality of the results demonstrates the powerful capability of this new installation.