Abstract
Differential cross sections for elastic scattering of 40 MeV positive pions from , , , , and were measured at 18 angles in the angular range 25°-160°. Relative uncertainties of 2.5% to 7% and overall normalization uncertainties of 4% to 7% were obtained. An optical potential fit of the data indicates that while the magnitudes of the strength parameters, except for , are different from values obtained from free scattering amplitudes, the variation of these magnitudes with target mass is roughly as predicted by the impulse approximation. Coulomb effects, especially in the cases of and , are extremely important, but impossible to unambiguously separate from the strong interaction in the optical model.
NUCLEAR REACTIONS Elastic scattering of 40 MeV from , , , , . Angular distributions: . Optical model and partialwave analysis of cross-section data.
- Received 8 May 1979
DOI:https://doi.org/10.1103/PhysRevC.20.1884
©1979 American Physical Society