Proton-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>3</mml:mn></mml:mmultiscripts></mml:math> elastic scattering at intermediate energies

Precise measurements, in proton-${}^{3}$He elastic scattering near 65 MeV, of cross sections, proton and ${}^{3}$He analyzing powers, and the spin correlation coefficient ${C}_{y,y}$ are compared with rigorous neutron-${}^{3}$H scattering calculations based upon realistic two-nucleon potentials. Proton-${}^{3}$He scattering at intermediate energies is found to be an excellent tool with which to test nuclear interaction models. Moreover, outstanding features that differ from those seen in nucleon-${}^{2}$H elastic scattering suggest the possibility of exploring $T=3/2$ three-nucleon forces, which are not accessible in three-nucleon scattering.