| Nuclear reactions of 58Fe and 58Ni beams of energies from 45 to 105 MeV/nucleon on isotopically pure 58Fe and 58Ni targets have been studied with the 4pi Array at Michigan State University. This detector array characterizes nearly all of the dozen or more charged particles produced in each individual reaction. Differences are found in the production of charged particles from reactions that are identical in every way except for the isospin (the neutron to proton ratio of is 1.23 for 58Fe and 1.05 for 58Ni). Of special interest is an "odd-even" effect found for beam velocity fragments detected at 6°. The Ni reaction produces 10% more fragments with even Z (such as carbon and neon) than the Fe reaction. The experimental facilities at the National Superconducting Cyclotron Laboratory (NSCL) are described. The Iowa contribution to these facilities is the Iowa Forward Array which is described in detail. |
