Abstract
The elastic and inelastic scattering of particles by and has been investigated at an incident energy of 139 MeV. The elastic cross sections have been analyzed in terms of the optical model using a six-parameter Woods-Saxon potential. The data for are sufficient to eliminate the discrete ambiguity in the strength of the potential; the single potential which fits the data has a well depth of 116 MeV and a volume integral of 298 MeV . For the discrete ambiguity could not be resolved. This outcome is consistent with recently developed criteria for experimental data necessary to resolve the discrete ambiguity. A discussion of the discrete ambiguity, in particular the dependence, is given, and it is shown that measurements at higher energies are required to resolve the ambiguity for . The inelastic cross sections for transitions to the 1.45-MeV (), 2.46-MeV (), 4.47-MeV () states in and the 2.62-MeV () state in have been analyzed with distorted-wave Born-approximation (DWBA) calculations using collective-model form factors. The results are consistent with previous analyses of lower-energy data.
- Received 18 December 1972
DOI:https://doi.org/10.1103/PhysRevC.7.1938
©1973 American Physical Society