标题： 核子和碎片在40Ar + 27Al碰撞中的流动研究通过AMD 显示英文标题

标题： Flow of Nucleons and Fragments in 40Ar + 27Al Collisions Studied with AMD

摘要： 核子和碎片在中能40Ar + 27Al碰撞中的集体横向动量流是用反对称分子动力学（AMD）计算的。 用对应于核物质软EOS的Gogny力计算得到的流动及其平衡能量与实验结果非常吻合。 特别是，在负流区域，计算得到的碎片流绝对值大于核子流的绝对值，这可以通过流动的两个成分的存在来解释。 除了许多相似之处，还在12C + 12C和40Ar + 27Al碰撞中发现了氘核流的差异，并通过关注轻碎片的产生机制来研究其起源。 我们还研究了核子和碎片流对随机碰撞截面和有效相互作用的依赖性，并得出结论，没有动量依赖性的刚性EOS与实验数据不一致。 显示英文摘要

摘要： Collective transverse momentum flow of nucleons and fragments in intermediate energy 40Ar + 27Al collisions is calculated with the antisymmetrized molecular dynamics (AMD). The observed flow and its balance energy are reproduced very well by the calculation with the Gogny force which corresponds to the soft EOS of the nuclear matter. Especially the calculated absolute value of the fragment flow is larger than that of the nucleon flow in the negative flow region, which can be explained by the existence of two components of flow. In addition to many similarities, difference in the deuteron flow is found between 12C + 12C and 40Ar + 27Al collisions, and its origin is investigated by paying attention to the production mechanism of light fragments. We also investigate the dependence of the flow of nucleons and fragments on the stochastic collision cross section and the effective interaction, and conclude that the stiff EOS without momentum dependence of the mean field is not consistent to the experimental data.