EXPERIMENTAL SET-UP FOR HIGH-ENERGY GAMMA-RAY STUDIES AT THE WARSAW CYCLOTRON AND FIRST EXPERIMENTS

A multidetector set-up has been developed for the detection of photons between 5 and 40 MeV. It consists of 10 cm x 10 cm EGO cylinder shiel ded with active and passive shields against the cosmic-rays and the ga mma-ray background and of a multiplicity filter consisting of 28 detec tors (BaF2 and NaI(Tl)). The neutrons are discriminated with TOF. The system is installed at the new Warsaw Cyclotron. It is intended for st udies of giant dipole resonances in hot nuclei and of bremsstrahlung a t low beam energies. The first experiments and the plans for further d evelopment of the set-up are described.