2-BODY DENSITY CONTRIBUTION TO NUCLEUS-NUCLEUS TOTAL REACTION CROSS-SECTION

Using the effective profile expansion for the Glauber elastic S-matrix for nucleus-nucleus scattering in which the leading term is the generally employed optical limit model and the other terms depend successively upon two-body, three-body, etc densities of the colliding nuclei, we calculate total reaction cross sections for a few heavy-ion systems in the medium energy range, up to the two-body density term in the expansion. We find that the effect of the two-body density term on the calculated cross section depends considerably upon the incident energy per nucleon and, in general, it is not insignificant in some energy regions.