Investigation of the symmetry energy of nuclear matter using isospin-dependent quantum molecular dynamics
Investigation of the symmetry energy of nuclear matter using isospin-dependent quantum molecular dynamics
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DOI：
10.1007/s41365-020-00766-x
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发表时间：
2020-05
影响因子：
2.8
通讯作者：
Hao Yu;D. Fang;Yugang Ma
中科院分区：
文献类型：
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作者：
Hao Yu;D. Fang;Yugang Ma
用同位旋相关的量子分子动力学(IQMD)模型对不同密度、不同同位旋不对称性和不同温度下的无限大核物质进行了模拟，研究了状态方程和对称能.数值模拟中使用了严格的周期边界条件。从不同条件下的结合能中提取对称能，并用同样的方法与经典分子动力学(CMD)模型进行了比较。结果表明，对于低密度下的对称能，两种模型都能较好地再现实验结果，但对于饱和密度以上的核物质，IQMD比CMD更合适。这表明IQMD可能是研究无限大核物质性质的可靠模型。
Simulations of infinite nuclear matter at different densities, isospin asymmetries and temperatures are performed using the isospin-dependent quantum molecular dynamics (IQMD) model to study the equation of state and symmetry energy. A rigorous periodic boundary condition is used in the simulations. Symmetry energies are extracted from the binding energies under different conditions and compared to the classical molecular dynamics (CMD) model using the same method. The results show that both models can reproduce the experimental results for the symmetry energies at low densities, but IQMD is more appropriate than CMD for nuclear matter above the saturation density. This indicates that IQMD may be a reliable model for the study of the properties of infinite nuclear matter.