Reaction cross sections at intermediate energies and Fermi-motion effect

Precise measurements of the reaction cross sections (σR) for C12 on Be, C, and Al targets and Be11 on Be targets were performed in the energy range between 30 and 400 MeV/nucleon. The energy dependencies of σR for C12, Be11, and B8 were compared to Glauber-type calculations performed using reliable nucleon-density distributions that are supported by experimental data. It was found that the Glauber-type calculations, which include the higher-order multiple scattering effect, the finite-range effect, and the Fermi-motion effect of nucleons in the nucleus, seem to provide a good prescription relating σR at intermediate energies to a proper nucleon-density distribution. This method provides a powerful tool with which to study the nuclear surface structure through the σR measurements.