Experiments with radioactive beams

Examples of recent experiments with radioactive beams at intermediate beam energies are given. The neutron halos encountered near the drip line are of an extreme single-particle nature, loosely bound and spatially extended. They are characterized by large electric-dipole strength at low energies that essentially exhausts the relevant cluster sum rules. Other characteristic features are the breakup by shake-off and diffraction dissociation, and the narrow momentum distributions observed for the projectile residue. Finally, some preliminary results on the spectroscopy of single-particle halo and core states by stripping reactions are reported.