Study on excitation function and isospin dependencies of total reaction cross section via the Boltzmann-Uehling-Uhlenbeck model

The excitation function and isospin dependencies of sigma(R) have been inve stigated by using the Boltzmann-Uehling-Uhlenbeck (BUU) model with a square -type density distribution. When the width parameter of the square distribu tion is obtained by fitting sigma(R) at relativistic energies, the BUU-mode l can reproduce the experimental data at intermediate energies better than Glauber model. The systematical underestimation of sigma(R) at intermediate energy by Glauber model was removed out now by BUU calculation framework. It is also found that sigma(R) is sensitive to nuclear equation of state an d sigma(NN)(in-medium). The difference factor d defined in text is sensitiv e to the nuclear structure such as neutron halo and neutron skin, etc.