Double giant dipole resonance in hot nuclei Original Research Article

Signals from Double Dipole Giant Resonances (DGDR) in hot nuclei have been searched in a γ-γ coincidence experiment using the HECTOR array at the Laboratori Nazionali di Legnaro. The experimental single γ-ray spectrum and the projection of the γ-γ matrix have been compared with a standard Monte Carlo Statistical Model code including only the single GDR excitation. These calculations have been used as background to determine the extra-yield associated with the DGDR de-excitation. Results have been compared with a previous experiment confirming the presence of the DGDR excitation in fusion-evaporation reactions.