Effect of isospin-dependent cluster recognition on the observables in heavy ion collisions
Effect of isospin-dependent cluster recognition on the observables in heavy ion collisions
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DOI：
10.1103/physrevc.85.051602
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发表时间：
2012-05
影响因子：
3.1
通讯作者：
Y. Zhang;Zhu-xia Li;Chengshuang Zhou;M.B.Tsang
中科院分区：
文献类型：
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作者：
Y. Zhang;Zhu-xia Li;Chengshuang Zhou;M.B.Tsang
我们在量子分子动力学模型中使用的簇识别算法中引入了同位旋依赖性，以描述重离子碰撞中的碎片形成。这种变化降低了发射核子的产量并提高了碎片的产量，尤其是较重的碎片。富中子较轻碎片的增强主要发生在中速段。因此，同位旋相关的可观测值，例如同位素分布、n/p、t/ 3 He 的产率以及等尺度参数都会受到影响。我们还研究了这种变化如何影响重离子碰撞的平衡。
We introduce isospin dependence in the cluster recognition algorithms used in the quantum molecular dynamics model to describe fragment formation in heavy ion collisions. This change reduces the yields of emitted nucleons and enhances the yields of fragments, especially heavier fragments. The enhancement of neutron-rich lighter fragments mainly occurs at midrapidity. Consequently, isospin-dependent observables, such as isotope distributions, yield ratios of n/p, t/ 3 He, and isoscaling parameters are affected. We also investigate how equilibration in heavy ion collisions is affected by this change.