Abstract
We discuss the evolution of the properties of giant dipole and quadrupole resonances in nuclei with strong neutron excess. The presence of the neutron skin and the large mixing of isoscalar and isovector character lead to novel features in the excitation of these modes in nuclear reactions. We discuss in particular the possible excitation of isovector dipole giant mode via isoscalar nuclear probes. In the case of large neutron excess, important contributions are obtained from the nuclear excitation, which may even become predominant according to proper kinematical conditions. At variance with the usual situation encountered in inelastic processes, constructive interference can be found between nuclear and Coulomb contributions.
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