BEYOND THE EIKONAL MODEL FOR FEW-BODY SYSTEMS

A physical prescription to improve the accuracy of few-body Glauber mo del calculations of reactions involving loosely bound projectiles is p resented in which the eikonal phase shift function of each projectile constituent is modified to account for curvature of its trajectory. No neikonal effects due to both nuclear and Coulomb interactions are trea ted on an equal footing. The proposed method is assessed quantitativel y by comparison with full quantum mechanical calculations in the case of Be-11+C-12 elastic scattering, treated as a three-body Be-10 + n target problem, at energies of 25 and 49.3 MeV/nucleon. Calculated cro ss-section angular distributions which include the noneikonal modifica tions are shown to be accurate to larger scattering angles, and for lo wer incident projectile energies.