Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (6): 61 doi: 10.1007/s41365-020-00766-x


Investigation of the symmetry energy of nuclear matter using isospin-dependent quantum molecular dynamics

Hao Yu1,2 • De-Qing Fang3,1 • Yu-Gang Ma3,1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of the Chinese Academy of Sciences, Beijing 100080, China
    3 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
  • Received:2020-02-02 Revised:2020-04-02 Accepted:2020-04-02
  • Contact: De-Qing Fang;Yu-Gang Ma;
  • Supported by:
    This work is partially supported by the National Key R&D Program of China (No. 2018YFA0404404), the National Natural Science Foundation of China (Nos. 11925502, 11935001, 11961141003, 11421505, 11475244 and 11927901), Shanghai Development Foundation for Science and Technology (No. 19ZR1403100), the Strategic Priority Research Program of the CAS (No. XDB34030100 and XDB34030200) and the Key Research Program of Frontier Sciences of the CAS (No. QYZDJ-SSW-SLH002).
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Hao Yu, De-Qing Fang, Yu-Gang Ma. Investigation of the symmetry energy of nuclear matter using isospin-dependent quantum molecular dynamics.Nuclear Science and Techniques, 2020, 31(6): 61     doi: 10.1007/s41365-020-00766-x

Abstract: 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.

Key words: Infinite nuclear matter, Symmetry energy, IQMD model