Abstract
A simple optical potential of Woods-Saxon form is used within the framework of the Klein-Gordon equation, for the first time, to analyze the elastic differential cross sections for 1.37 GeV (lab) incident cx-particles on C-12 and calcium isotopes Ca-40,Ca-42,Ca-44,Ca-48. The relativistic energy-momentum relation assures the need for relativistic calculations. As such, the previously determined parameters of all optical potential forms, used in the nonrelativistic Schrodinger equation and successfully analyzing the alpha-C-12 and alpha-Ca-40,Ca-42,Ca-44,Ca-48 data at 1.37 GeV, are to be revised. In the presence of Coulomb potential, as in the cases under consideration, the asymptotic solution of the Klein-Gordon equation differs from the corresponding one for the Schrodinger equation and the codes are modified accordingly.