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PACIAE, a parton and hadron cascade model, is utilized to systematically investigate strange particle production and strangeness enhancement in Au+Au collisions and in Pb+Pb collisions with the √SNN = 200 GeV at the RHIC and 2.76 TeV at the LHC, respectively. The experimental results at different centralities, using data from the STAR collaboration and the ALICE collaboration, are well described by the PACIAE model. This may represent the importance of the parton and hadron rescatterings, as well as the reduction mechanism for strange quark suppression, that are implemented in the PACIAE model. 相似文献
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SiC纤维增韧SiC基复合材料(SiC_f/SiC)由于其优越的性能而成为新一代核能系统重要候选材料之一.材料中的缺陷会使材料的力学性能发生变化,本文运用分子动力学程序LAMMPS模拟计算了分别含有空位、微空洞和反位替代三种缺陷的3C-SiC结构体系沿[100]方向的拉伸变形过程,原子间相互作用采用Tersoff多体势描述.通过模拟得到不同缺陷体系的应力—应变曲线和拉伸过程中体系能量,通过分析应力-应变曲线,得到了不同缺陷体系的杨氏模量、断裂应变、拉伸强度随缺陷"浓度"的变化关系,最后分析了3C-SiC拉伸断裂机理.研究结果表明,空位和微空洞对杨氏模量、拉升强度的影响类似,都是随着缺陷"浓度"的增加而减小,反位替代缺陷使体系的杨氏模量随缺陷"浓度"的增加而增大. 相似文献
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首先利用相对论纵向非均匀集体流模型讨论RHIC能区的净质子分布特征,并分别与AGS,SPS的实验结果比较,发现,RHIC能区所产生的粒子系统具有很强的非均匀分布特征,表现为很强的核透明性,并分析了非均匀集体流模型与实验中的核阻止特性的紧密联系,接着分别研究了RHIC能区所产生质子、反质子和净质子的分布,这些研究可以帮助我们深入了解最新的RHIC能区的粒子分布和核阻止特征. 相似文献
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PACIAE, a parton and hadron cascade model, is utilized to systematically investigate strange particle production and strangeness enhancement in Au+Au collisions and in Pb+Pb collisions with the √sNN=200 GeV at the RHIC and 2.76 TeV at the LHC, respectively. The experimental results at different centralities, using data from the STAR collaboration and the ALICE collaboration, are well described by the PACIAE model. This may represent the importance of the parton and hadron rescatterings, as well as the reduction mechanism for strange quark suppression, that are implemented in the PACIAE model. 相似文献
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