Relativistic coulomb excitation of giant resonances in the hydrodynamical model

Abstract

We investigate the Coulomb excitation of giant dipole resonances in relativistic heavy-ion collisions using a macroscopic hydrodynamical model for the harmonic vibrations of the nuclear fluid. The motion is treated as a combination of the Goldhaber-Teller displacement mode and the Steinwedel-Jensen acoustic mode, and the restoring forces are calculated using the droplet model. This model is used as input to study the characteristics of multiple excitation of giant dipole resonances in nuclei. Possibile signatures for the existence of such states are also discussed quantitatively.