(p, 2p) and (p, pd) reactions onHe3at 45.0 MeV

The reactions ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, 2p)d$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, pd)p$, and ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, 2p)pn$ have been studied at 45.0 MeV using a coplanar symmetric geometry. Angular correlations have been obtained for both the ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, 2p)d$ and ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, 2p)d^{*}$ reactions. Within the framework of the plane-wave impulse approximation (PWIA) the extracted momentum distributions of the $p+d$ and $p+d^{*}$ systems in ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ are compared with predictions calculated using relatively simple wave functions for ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, $d$, and $d^{*}$. Reasonable agreement between the shapes of the extracted and theoretical momentum distributions has been obtained. There exist differences between the momentum distributions extracted from the angular correlation and energy-sharing data. The PWIA predictions overestimate the cross sections by appreciable factors. The ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, pd)$ quasi-free scattering enhancements exhibit shifts in the peak position away from the minimum in the momentum of the spectator proton. The ${}_{}{}^3{}_{}{}^{}\mathrm{He}(p, 2p)pn$ continua are to first approximation in agreement with differential phase-space distribution predictions if the kinematic region of low energy for the relative motion of the unobserved $n-p$ pair is excluded.