The giant dipole resonance in very hot nuclei studied with the MEDEA detector

The characteristics of the Giant Dipole Resonance in hot nuclei formed by incomplete fusion of 36Ar + 90Zr at 27 MeV/u were measured at GANIL with the MEDEA detector. This set-up allows the simultaneous measurement of γ rays, light charged particles, and fusion residues. Preliminary results indicate that the giant dipole resonance shows up prominently in coincidence with the incomplete fusion residues which have a mean excitation energy of 550 MeV. By dividing the data into different momentum transfer bins, indications for the saturation with increasing excitation energy of the gamma multiplicity from Giant Dipole Resonance decay are obtained. (author) 27 refs.; 5 figs.; 2 tabs