HEAVY-ION COULOMB-EXCITATION AND GAMMA-DECAY STUDIES OF THE ONE AND 2-PHONON GIANT-DIPOLE RESONANCES IN PB-208 AND BI-209

Projectile - photon coincidences were measured for the scattering of a n 80 MeV/nucleon Zn-64 beam from Pb-208 and Bi-209 targets at the GANI L heavy ion accelerator facility. Projectile-like particles between 0. 5-degrees and 4.5-degrees relative to the incident beam direction were detected in the SPEG energy loss spectrometer where their momentum, c harge, and mass were determined. Photons were detected in the BaF2 sci ntillation detector array TAPS. Light charged particles produced in th e reaction were detected in the KVI Forward Wall. The analysis of the data acquired in this experiment is focused on three different phenome na: (1) the two phonon giant dipole resonance, (2) time dependence of the decay of the one phonon giant dipole resonance, and (3) giant reso nance strength in projectile nuclei.