TOTAL AND 2N-REMOVAL CROSS-SECTIONS OF THE NEUTRON-RICH ISOTOPES LI-8,LI-9,LI-11

Total interaction cross sections have been measured for Li-8 on C and Pb targets, for Li-9 on C, Al, Cu, Sn and Pb targets, as well as for Li-11 on C, Sn and Pb targets at about 80 MeV/nucleon. In addition, 2n-removal cross sections for Li-11 have been extracted. These measurements are used to determine the nuclear and the electromagnetic part of the cross sections for the different projectile-target combinations. The experimental results are compared to different model calculations. These comparisons allow one to draw conclusions on the matter density distribution of the neutron-rich lithium isotope Li-11. By comparing our data on the electromagnetic dissociation of Li-11 with all the other data available in the literature, we are able to put constraints on the dipole-strength distribution in Li-11. [GRAPH