Coincidence correlations between light charged particles in the matched reactions 905 and 1030 MeV ¹²¹Sb + ²⁷Al and 550 and 750 MeV ⁸⁶Kr + ⁶³Cu

Coincidence measurements have been made between ⁴He ¹H and a second particle ( ⁴He ¹H) produced in the reactions 905 and 1030 MeV ¹²¹Sb + ²⁷Al and 550 and 750 MeV ⁸⁶Kr + ⁶³Cu. All four of the reactions lead to composite systems of ¹⁴⁹Tb^* or ¹⁴⁸Gd^* which facilitates comparisons of matched reactions. In the two ¹²¹Sb + ²⁷Al reactions and the 550 MeV ⁸⁶Kr + ⁶³Cu reaction, the particle-particle coincidences are dominated by processes that lead to evaporation residues. In the 750 MeV ⁸⁶Kr + ⁶³Cu reaction, about half of the ¹H and ⁴He are associated with evaporation residue production. These particle-particle coincidences arise from cross sections that are subsets of the total evaporation residue cross sections. The derived individual particle chain lengths are ∼ 2 for both protons and alphas in each of the four reactions. The particle multiplicities and subset cross sections associated with the evaporation residues are quite similar for the matched reactions, in contrast to fission-like processes where spin-dependent entrance channel effects were observed.