Correlation measurements of light charged particles emitted at 20{degrees} from 140 MeV {sup 16}O+{sup 27}Al and {sup 18}O + {sub 27}Al reactions

We have measured small angle correlations between light particles (p,d,t,{alpha}) at an energy of 140 for the {sup 16}O+{sup 27}Al and {sup 18}O+{sup 27}Al systems. The correlation functions were measured at a laboratory angle of 20{degrees} with the Stony Brook LINAC. As for earlier work, the p-p and p-d results from both systems are well fit by a model which assumes statistical emission from an equilibrated compound nucleus. The d-{alpha} and {alpha}-{alpha} results from the two systems can be reproduced if a small amount of decaying excited {sup 6}Li or {sup 8}Be are included in the simulation. Finally, the relative two particle yields and deduced {sup 8}Be yield, which are very different for the two systems, will be compared to predictions based on statistical emission.