The resonating-group method, together with a phenomenological consideration of reaction effects, is used to analyze $p+\alpha$ scattering data at the relatively high c.m. energies of 68, 80, and 124.8 MeV. The nucleon-nucleon potential employed contains a weakly repulsive core and yields a reasonably satisfactory description of not only the two-nucleon scattering data but also the essential properties of the $\alpha$ particle. The result shows that satisfactory agreement with experiment can be obtained. In particular, it is found that, because of the use of a totally antisymmetric wave function, the scattering behavior at large angles is adequately described.

[NUCLEAR REACTIONS ${}_{}{}^4{}_{}{}^{}\mathrm{He}\mathrm{}(p,p)\mathrm{}$, $E=68,80,\mathrm{and} 124.8$ MeV (c.m.); calculated phase shifts and $\sigma \left(\theta \right)$. Resonating-group method.]

• Received 7 February 1977

DOI:https://doi.org/10.1103/PhysRevC.16.1