Energy-degraded RI beam for low-energy nuclear reactions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The development of an energy-degraded RI beam is described. RI beams are produced by intermediate energy nuclear reactions such as projectile fragmentation and in-flight fission. The energy of the RI beam is lowered by multi-step degraders. A method to produce such a lowenergy RI beam was examined by a simulation. It was applied in the experiment to make a low-energy 46Ar beam and in-beam γ -ray spectroscopy using the fusion–evaporation reaction and Coulomb excitation of the 46Ar beam was performed. This RI beam deceleration method was also considered for the RI beam facility (RIBF) and a simulation to produce a low-energy 108Mo beam was performed. The simulation result indicates that the method is also applicable for RIBF and it is hoped that research horizons will be greatly expanded by this method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .