Nucleon-Antinucleon Scattering

By use of the model of the nucleon-antinucleon interaction proposed by Ball and Chew, a calculation of the complex phase shifts at 50 and 260 Mev has been made. The values of annihilation, elastic-scattering, and charge-exchange cross sections, and the angular distributions for $\overline{p}-p$ and $\overline{p}-n$ elastic scattering are obtained. A comparison with the experimental data shows reasonable agreement. Finally, the parameters of an optical-model potential for antinucleon interaction with complex nuclei are presented.