Elastic Scattering of Protons byA40

Measurements of the elastic scattering differential cross sections have been made for the $p$-${\mathrm{A}}^{40}$ interaction. For proton energies between 1.75 Mev and 2.75 Mev and at an angle of 155°, the cross sections are essentially given by the Rutherford equation except for resonances at 1.90 Mev and 2.48 Mev. At these resonance energies, angular distributions for the interaction have been measured.