INVESTIGATION OF THE MECHANISMS OF MESON-FREE (4)HEP INTERACTIONS

Inelastic mechanisms of meson-free fragmentation of the He-4 nucleus a re discussed. Spatial correlations between secondary particles and the slopes of the differential cross sections d sigma/dt are investigated . Final-state interactions are shown to play an important role in the formation of deuterons and fragments of the 4He nucleus through coales cence. In the reaction (4)Hep --> dppn, the observed strong increase i n the ratio of the proton and neutron yields for emission angles close to 180 degrees is consistent with the assumption that the effect of a n intermediate Delta isobar is significant.