A microscopic study of ${}^{12}\mathrm{C}{-}^{12}\mathrm{C}$ elastic scattering at 1.016, 1.449, and 2.4 GeV has been made within the framework of the Coulomb modified Glauber model. The elastic S-matrix element has been evaluated considering the first two terms of the nuclear phase expansion series and using the realistic densities for the colliding nuclei. The effect of the phase variation of the NN scattering amplitude on the calculated elastic scattering differential cross sections has been studied. We find that a very good description of the experimental data at 1.016 and 1.449 GeV is achieved by considering the second order term of the phase expansion series and the phase variation of the NN scattering amplitude. However, at 2.4 GeV, although the second order phase term provides some improvement over the optical limit calculation, still the theoretical situation remains unsatisfactory.

• Received 10 April 2001

DOI:https://doi.org/10.1103/PhysRevC.65.054607