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An improved quantum molecular dynamics model is developed. By using this model, the properties of ground state of nuclei from ⁶Li to ²⁰⁸Pb are described very well with one set of parameters. The fusion reactions for ⁴⁰Ca+⁹⁰Zr, ⁴⁰Ca+⁹⁶Zr, and ⁴⁸Ca+⁹⁰Zr at energies near the barrier are studied by this model. The experimental data of the fusion cross sections for ⁴⁰Ca+90,96Zr at energies near the barrier are reproduced remarkably well without introducing any new parameters. The mechanism for the enhancement of the fusion cross sections for neutron-rich nuclear reaction near barrier is analyzed.
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Wang et al. (2002) studied this question.
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