The elastic scattering of pions from ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ is analyzed with a single-scattering optical potential, which is used in the solution of a relativistic integral scattering equation. Good agreement is obtained with available data near 1 GeV and choices are made for the nuclear and nucleon charge form factors and among the phase parameter sets at this energy.

NUCLEAR REACTIONS Scattering theory, pions on ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, $E=1\mathrm{}$ GeV, calculate $\sigma \left(\theta \right)$, compare nuclear and nucleon form factors and phase shift sets.

• Received 2 June 1980

DOI:https://doi.org/10.1103/PhysRevC.23.399