Fragmentation of very neutron - rich projectiles around 132 Sn

We propose an experiment to isotopically identify and determine the production cross sections of residual nuclei in the fragmentation of very neutron-rich nuclei around Sn produced in the fission of relativistic U primary projectiles. These measurements will provide valuable information about a possible two-step reaction scheme (fission-fragmentation) to optimise the production of extremely neutron-rich nuclei in future radioactive-beam facilities (EURISOL, FAIR). At the same time, the interaction cross section, projectile protonand neutron-pickup cross sections and proton-removal cross sections of these mediummass neutron-rich isotopes will be measured. These observables will allow to investigate basic ground state properties of those extremely neutron-rich nuclei like density distributions and/or binding energies.