对称能对核阻止的影响及其与轻荷电碎片产生的关系
Effect of the symmetry energy on nuclear stopping and its relation to the production of light charged fragments
摘要：
我们提出了一个完整的系统学（激发函数，碰撞参量，系统大小，同位旋不对称性，和状态方程的依赖性）的全球停止和碎片生产的重离子反应的能量范围在50和1000 MeV/核子之间的对称能和同位旋相关的截面的存在下。研究发现，阻止程度与对称能的关系很弱，而与同位旋相关的截面的关系很强。然而，对称能和同位旋相关的截面对轻带电粒子（LCP）的发射具有超过10%的数量级的影响。这意味着核阻止和LCP可以作为一种工具来获得与同位旋相关的截面信息。有趣的是，在对称能量的存在下，LCP的发射被发现是高度相关的全球停止。
英文摘要：
We present a complete systematics (excitation function, impact parameter, system size, isospin asymmetry, and equations of state dependences) of global stopping and fragment production for heavy-ion reactions in the energy range between 50 and 1000 MeV/nucleon in the presence of symmetry energy and an isospin-dependent cross section. It is observed that the degree of stopping depends weakly on the symmetry energy and strongly on the isospin-dependent cross section. However, the symmetry energy and isospin-dependent cross section has an effect of the order of more than 10% on the emission of light charged particles (LCP's). It means that nuclear stopping and LCP's can be used as a tool to get the information of an isospin-dependent cross section. Interestingly, the LCP's emission in the presence of symmetry energy is found to be highly correlated with the global stopping.
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