Nuclear Stopping and Pauli Blocking in Heavy-Ion Reactions near Fermi Energy**Supported by the National Natural Science Foundation Of China under Grant Nos 11265013, 11175074, 11264033 and 11464040.

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The dissipation phenomenon in the heavy-ion reaction at incident energy near the Fermi energy is studied by simulating the reaction 129Xe+129Sn with the isospin-dependent quantum molecular dynamics model. The calculations involving a proper prescription of implementing the Pauli exclusion principle show that the isotropy ratio measured by free protons emitted in the reaction at energy slightly higher than the Fermi energy is in agreement with the experimental data recently released by the INDRA collaboration. A feasible value of the Pauli-blocking factor is estimated by comparing the theoretical results with the experimental data for the energy range considered here.