STUDY OF WEAKLY-BOUND AND UNBOUND STATES OF EXOTIC NUCLEI WITH BINARYREACTIONS

Binary reactions using neutron-rich beams (and targets) give the best approach to study the level structure of exotic nuclei. Systematic cro ss section dependencies of multi-step transfer reactions are discussed . Some reactions, for example the proton-neutron exchange (C-12,N-12) and (C-13,N-13), have distinct selectivity for the population of unnat ural or natural parity states, respectively. This selectivity has been applied to new spectroscopic studies of Li-10 using the Be-10(C-12,N- 12) and Be-9(C-13,N-12) reactions. The lowest resonance of Li-10 is ob served at 0.24(6) MeV above the neutron threshold. The results are dis cussed together with other available data.