Effects of the in-medium NN interaction on total reaction and neutron removal cross sections -: art. no. 044617

We discuss calculations of total reaction cross sections between complex nuclei, sigma(R), using optical limit and few-body Glauber models in which the free nucleon-nucleon cross sections sigma(NN) are replaced by their (reduced) values in the nuclear medium. This replacement lowers sigma(R) by at most a few percent when sigma(NN) is determined from the local matter density in each overlapping volume element of the significant projectile-target trajectories. This relatively small effect contrasts with reductions of about 10% in sigma(R) reported by Xiangzhou , who assume a global value for the matter density throughout the interaction region. For two-neutron halo nuclei, we investigate the significance of these in-medium effects for the neutron-removal cross sections, sigma(-2n). We show that use of an in-medium sigma(NN) raises sigma(-2n) for He-6 but lowers it for Li-11, because of their different halo sizes.