(p,2p) and (p,pd) reactions on 3H at 45.6 MeV

The reactions 3H(p,2p)nn, 3H(p,pd)n, and 3He(p,2p) d, 3He(p,2p)pn, and 3He(p,pd)p have been studied at 45.6 and 45.0 MeV, respectively, by using coplanar symmetric and asymmetric geometries. An angular correlation has been obtained for the 3H(p,2p)[nn] reaction, where [nn] denotes an n--n pair with low energy for its relative motion. Energy sharing data for this reaction have also been obtained at a number of coplanar asymmetric angle pairs which allow zero spectator momentum. Within the framework of the plane wave impulse approximation the extracted momentum distributions of the p+[nn[ system in 3H and the p+d and p+d* systems in 3He are compared with predictions calculated using relatively simple wave functions for 3H, 3He, d, d*, and [nn]. Reasonable agreement between the shapes of the extracted and theoretical momentum distributions has been obtained, but there exist differences between the momentum distributions extracted from the angular correlation and energy sharing data. The 3H(p,pd) quasifree scattering enhancements exhibit shifts in the peak position away from the minimum in the momentum of the spectator neutron. Comparison of the four-body continua of the 3H(p,2p)nn reaction reveals enhancements which can be interpreted as due to pseudo-two-body processes, namely, the p--d* quasifree scattering process and the reaction p+3H→d*+d*