Reaction cross-sections for stable nuclei and nucleon density distribution of proton drip-line nucleus 8B

Abstract

The optical limit of the Glauber theory with zero-range approximation, which is successfully used at high energies to connect the nucleon density distribution with reaction cross-sections (σR), gives somewhat smaller values of σR by 10–20% at intermediate energies. We have precisely measured the σR for 12C on Be, C, and Al at 30A–200A MeV, and for 9Be on Be at 70A–100A MeV to investigate the enhancement of σR compared to the optical-limit calculation. From the enhancements, we deduced the nucleon-nucleon range as a function of energies. We deduced the density distribution of 8B analyzing the known experimental σR for 8B with an enhancement correction or with the finite range effect as a test.