Scattering of Protons by Deuterium and Helium

We present results of detailed spin- and isospin-dependent analyses of $\mathrm{pd}$ and $p-{}_{}{}^4{}_{}{}^{}\mathrm{He}$ elastic-scattering intensities, polarizations, and total cross sections. The basic nucleon-nucleon scattering amplitudes used yield nucleon-nucleon observables in excellent agreement with measurements, including those of the elastic-scattering intensity, polarization, and spin correlation. Contributions of multiple scatterings, including multiple charge-exchange collisions, produce considerable structure in the predicted polarizations.