非对称碰撞核多重碎裂的系统研究
Systematic study of multi-fragmentation in asymmetric colliding nuclei
摘要：
本文利用软硬状态方程对能量在50 ~ 600 MeV/核子范围内的重离子反应中非对称碰撞核的多重碎裂进行了较为系统的理论研究。本研究是在一个isospindependent量子分子动力学模型中进行的。为了观察质量不对称的影响，在没有库仑相互作用的情况下进行模拟。库仑相互作用使碎片的产生增加了约20%。我们设想了一个有趣的结果，大型非对称碰撞核。虽然近对称核描绘了一个众所周知的上升和下降的趋势，在E= 100 MeV/核子附近的峰值，但是，这种趋势是完全缺失的大不对称核。因此，需要实验来验证这一预测。
英文摘要：
We present a complete systematically theoretical study of multifragmentation for asymmetric colliding nuclei for heavy-ion reactions in the energy range between 50 MeV/nucleon and 600 MeV/nucleon by using soft and hard equations of state. This study is performed within an isospindependent quantum molecular dynamics model. To see the effect of mass asymmetry, simulations are carried out in the absence of Coulomb interactions. Coulomb interactions enhances the production of fragments by about 20%. We envision an interesting outcome for large asymmetric colliding nuclei. Although nearly symmetric nuclei depict a well known trend for rising and falling with a peak around E= 100 MeV/nucleon, this trend, however, is completely missing for large asymmetric nuclei. Therefore, experiments are needed to verify this prediction.
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