COINCIDENCE CORRELATIONS BETWEEN LIGHT CHARGED-PARTICLES IN THE MATCHED REACTIONS 905-MEV AND 1030-MEV SB-121-27 AND 550-MEV AND 750-MEV KR-86+CU-63(AL)

Coincidence measurements have been made between He-4/H-1 and a second particle (He-4/H-1) produced in the reactions 905 and 1030 MeV Sb-121 + Al-27 and 550 and 750 MeV Kr-86 + Cu-63. All four of the reactions l ead to composite systems of Tb-149 or Gd-148* which facilitates compa risons of matched reactions. In the two Sb-121 + Al-27 reactions and t he 550 MeV Kr-86 + Cu-63 reaction, the particle-particle coincidences are dominated by processes that lead to evaporation residues. In the 7 50 MeV Kr-86 + Cu-63 reaction, about half of the H-1 and He-4 are asso ciated with evaporation residue production. These particle-particle co incidences arise from cross sections that are subsets of the total eva poration residue cross sections. The derived individual particle chain lengths are similar to 2 for both protons and alphas in each of the f our reactions. The particle multiplicities and subset cross sections a ssociated with the evaporation residues are quite similar for the matc hed reactions, in contrast to fission-like processes where spin-depend ent entrance channel effects were observed.