基于量子分子动力学模型的重离子碰撞中的动力学偶极$γ$辐射
Dynamical dipole $γ$ radiation in heavy-ion collisions on the basis of the quantum molecular dynamics model
摘要：
在量子分子动力学模型的框架下，研究了重离子碰撞中的动力学偶极$γ$射线辐射。研究了$^{40}$ Ca轰击$^{48}$ Ca及其同位素体系在不同入射能量和不同碰撞参量下的反应。计算了$γ$射线的产额，提取了$γ$谱的质心能量和动态偶极发射宽度，研究了$γ$发射的性质.此外，还研究了动态偶极$γ$射线辐射对同位旋和物态方程对称性能量系数的敏感性。结果表明，对动力学偶极$γ$辐射的详细研究可以提供关于状态方程和正常核密度附近对称能的信息。
英文摘要：
Dynamical dipole $γ$-ray emission in heavy-ion collisions is explored in the framework of the quantum molecular dynamics model. The studies are focused on systems of $^{40}$Ca bombarding $^{48}$Ca and its isotopes at different incident energies and impact parameters. Yields of $γ$ rays are calculated and the centroid energy and dynamical dipole emission width of the $γ$ spectra are extracted to investigate the properties of $γ$ emission. In addition, sensitivities of dynamical dipole $γ$-ray emission to the isospin and the symmetry energy coefficient of the equation of state are studied. The results show that detailed study of dynamical dipole $γ$ radiation can provide information on the equation of state and the symmetry energy around the normal nuclear density.
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