Pre-equilibrium dipole excitation and gamma-ray fragment angular correlation in the S-32+Ge-74 reaction

We report on the results obtained from the study of the S-32 +Ge-74 deep in elastic reaction at. incident energy E = 320 MeV. High-energy gamma-rays we re detected in an array of 6 seven-pack BaF2 clusters. Coincidence with com plex fragments detected in 12 three-stage telescopes ensured the selection of peripheral reaction events. In order to investigate the pre-equilibrium dipole strength excitation two independent analyses were performed. In the first analysis the energy spectra of the gamma-rays were evaluated in the s tatistical model framework while in the second one the gamma-ray fragment a ngular correlation with respect to the nuclear spin vector of the composite system was studied. Both methods indicate the excitation of dipole strengt h in the highly deformed dinucleus and provide dipole resonance parameter s ets that are in good agreement with each other.