Abstract
We calculate the nucleon-nucleon cross section in the nuclear medium with the Brueckner G-matrix and apply it in the quantum molecular-dynamics (QMD) approach to the C-C and Nb-Nb reactions. QMD describes successfully the many-body dynamics of heavy-ion collisions using so far an isotropic NN cross section of 40 mb. Comparing the momentum transfer in transverse and longitudinal direction and the number of emitted particles calculated with the G-matrix cross section and the isotropic cross section, we find for these inclusive data only minor differences between the results in the C-C case but larger ones in the Nb-Nb case. A good agreement is obtained with the experimental double-differential cross section for charged-particle emission in the C-C reaction at E lab=84MeV/nucleon.
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