Reaction cross sections at intermediate energies and Fermi-motion effect

Precise measurements of the reaction cross sections (sigma(R)) for C-12 on Be, C, and Al targets and Be-11 on Be targets were performed in the energy range between 30 and 400 MeV/nucleon. The energy dependencies of sigma(R) for C-12, Be-11, and B-8 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 sigma(R) 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 sigma(R) measurements.

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