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arXiv 1106.0099nucl-th
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对称碰撞核的平衡能与跃迁能的关联

Correlation between balance energy and transition energy for symmetric colliding nuclei

Rajni, Suneel Kumar, Rajeev K. Puri

摘要:

采用与同位旋相关的量子分子动力学模型,研究了入射能量为40 ~ 1200 MeV/核子的不同体系的重离子碰撞中平衡能与碎片跃迁能之间的相关性.随着入射能量的增加,椭圆流表现出从正流(面内)到负流(面外)的转变。该跃迁能与碎片的尺寸、反应体系的复合质量和反应的碰撞参量有关。已经观察到,减少的横截面可以解释实验数据。跃迁能与平衡能之间存在相关性,二者之差随碰撞核总质量的增加而减小。

英文摘要:

We study the correlation between balance energy and transition energy of fragment in heavy-ion collisions for different systems at incident energies between 40 and 1200 MeV/nucleon using an isospin-dependent quantum molecular dynamics model. With increasing incident energy, the elliptic flow shows a transition from positive (in-plane) to negative (out-of-plane) flow. This transition energy is found to depend on the size of fragments, composite mass of reacting system, and the impact parameter of reaction. It has been observed that reduced cross-section can explain the experimental data. There is a correlation between transition energy and balance energy as their difference decreases with increase in the total mass of colliding nuclei.

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