Fast protons and alpha particles from the /sup 12/C+/sup 60/Ni reaction

The emission of energetic light ions from heavy-ion induced reactions was studied by measuring coincidences of protons and alpha particles with (1) Z = 1 to 7 particles, (2) discrete ..gamma.. rays, and (3) ..gamma..-ray multiplicities from bombardment of /sup 60/Ni with /sup 12/C ions. Incident beam energies were 136 and 194 MeV. Discrete ..gamma.. rays were used to identify the residual target-like fragments. Most of the particle-particle coincident angular correlations are strongly peaked in the forward direction; the full width of half maximum of the proton distributions are typically 50/sup 0/, those of the alpha particles are 30/sup 0/. The N-Z distributions of the residual nuclei peak around /sup 60/Ni. The ..gamma..-ray multiplicities are insensitive to the energy of the gating energetic light ion and are about 9 for 136-MeV /sup 12/C projectiles and 10 for 194 MeV. The results indicate the contribution of more than one mechanism in producing the high-energy light ions. In part the energetic light ions are emitted in association with a projectilelike fragment. A major component of the energetic light ions can be explained as emission from the projectilelike fragment during the collision process followed by fusion of the remainder of the fragment withmore » the target.« less