Excitation of collective modes in neutron-rich and in weakly-bound nuclei Original Research Article

Properties of collective modes in very neutron-rich nuclei and in weakly-bound nuclei are discussed. In particular the effect of the occurence of neutron skins on the properties of the traditional collective modes, such as the Giant Dipole Resonance and the Giant Quadrupole Resonance, is reviewed. As for the low-lying part of the response, we briefly discuss the occurrence of multipole strength at the continuum threshold in the case of weakly-bound nuclei close to the drip-lines. Application to the multipole response of weakly-bound cluster nuclei, such as 7Li, is presented.