ELASTIC-SCATTERING OF SI-28 FROM AL-27 AT 70, 80, 90, AND 100 MEV

Differential cross sections for the elastic scattering of Si-28 from A l-27 have been measured at 70, 80, 90, and 100 MeV bombarding energies . The data have been analyzed in the framework of the optical model, t he parametrized phase shift model, the generalized Fresnel model, and the Coulomb-modified Glauber model. The scattering matrix elements, de termined from the analysis of the data at each energy using these mode ls, are in agreement with each other. The strong absorption radius ove r the range of energies for the measurement is energy independent. The total reaction cross section at these energies are deduced. The merit s and demerits of various models in the context of the experimental da ta are discussed.