Abstract
Scattering models with either relativistic or nonrelativistic dynamics are used to predict elastic scattering observables in the forward angle, Coulomb-nuclear interference region for 500 and 800 MeV O, , and . At 500 MeV the differential cross sections for the relativistic model are 15–25 % larger than those of the nonrelativistic model. Ambiguities in the theoretical predictions which arise from empirical input used by the models and from approximations made in numerically evaluating higher order corrections are estimated and found to contribute ±2%–±6% to the uncertainty of the differential cross sections in the forward angle region at 500 MeV for Ca and . The sensitivity of the relativistic model cross sections to the use of a variety of relativistic nuclear structure models and different prescriptions for the virtual NN¯ pair process for the projectile is investigated and found to be largest at 500 MeV.
- Received 14 September 1987
DOI:https://doi.org/10.1103/PhysRevC.37.224
©1988 American Physical Society