Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-08-19
Phys.Rev.C76:044604,2007
Physics
Nuclear Physics
Nuclear Theory
13 pages, 6 figures
Scientific paper
10.1103/PhysRevC.76.044604
The mean free paths and in-medium scattering cross sections of energetic nucleons in neutron-rich nucleonic matter are investigated using the nucleon optical potential obtained within the relativistic impulse approximation with the empirical nucleon-nucleon scattering amplitudes and the nuclear densities obtained in the relativistic mean field model. It is found that the isospin-splitting of nucleon mean free paths, sensitive to the imaginary part of the symmetry potential, changes its sign at certain high kinetic energy. The in-medium nucleon-nucleon cross sections are analytically and numerically demonstrated to be essentially independent of the isospin asymmetry of the medium and increase linearly with density in the high energy region where the relativistic impulse approximation is applicable.
Chen Lie-Wen
Jiang Wei-Zhou
Li Bao-An
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