Comparison of Macroscopic and Microscopic Calculations of High-EnergyNe20+U238Collisions

For the reaction ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ + ${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$ at a laboratory bombarding energy per nucleon of 250 MeV we calculate the cross section $\frac{d^2\sigma }{\mathrm{dEd}\Omega }$ for outgoing protons using four different approaches. These are relativistic fluid dynamics, classical many-body calculations with a hard-sphere nucleon-nucleon potential, and two versions of relativistic intranuclear-cascade calculations. These calculations reproduce some features of the experimental data, but some major discrepancies remain.