Prominent Two-Body Effects in the Processesp(He3,pd)pandd(d,pd)n

Abstract
A coincidence study of three-body breakup of the He3+p and the d+d system has been made with the multidetector system BOL at 69-MeV He3 energy and 26-MeV deuteron energy. Strong contributions from quasi two-body reactions (final-state interaction and quasifree scattering) are found. The Watson-Migdal theory and the plane-wave impulse approximation model do not consistently explain the data. The discrepancies are particularly striking where different two-body mechanisms overlap.