BREAKUP OF INTERMEDIATE-MASS FRAGMENTS, BE-8 AND LI-6, FORMED IN THE REACTION AR-40+AG AT 7.8A AND 17A MEV

Large- and small-angle correlation measurements are reported for H-1-H -1, He-4-He-4, and H-2-He-4 pairs from 7.8A and 17A MeV Ar-40 + (nat)A g. These measurements are interpreted with the aid of trajectory calcu lations designed to simulate evaporationlike emission of particles and fragments. The most important physical parameter needed to fit the co rrelation function peaks is the fractional yield of unstable fragments (Be-8 or Li-6) compared to independently evaporated particles (He-4-H e-4) or (H-2-He-4). In this approach, the peaks in the simulated corre lation functions contain essentially no information concerning the spa ce-time extent of the emitter source. Nevertheless, these simulations can account for the data very well.