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首页> 外文会议>AIP Conference Proceedings vol.865; China-Japan Joint Nuclear Physics Symposium; 20060516-20; Shanghai(CN) >Elliptic flow in intermediate energy heavy ion collisions and n-n interaction and in-medium cross sections
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Elliptic flow in intermediate energy heavy ion collisions and n-n interaction and in-medium cross sections

机译：中能重离子碰撞，n-n相互作用和中等截面中的椭圆流

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摘要

The elliptic flow for Z ≤ 2 particles in heavy ion collisions at energies from several tens to several hundreds MeV per nucleon is investigated by means of transport model,i.e. a new version of the Improved Quantum Molecular Dynamics model (ImQMD05), and compared with experiment results. By applying different Skyrme interactions in transport calculations we have studied the influence of nuclear equation of state(EOS) on the elliptic flow. We find a soft equation of state is required for elliptic flow in intermediate energy heavy ion collisions. The density and energy dependence of in-medium nucleon-nucleon cross sections(NNCS) are studied through the elliptic flow and the nuclear stopping in intermediate energy heavy ion collisions. At low energies, the behavior of in-medium NNCS is similar with phenomenological expression as well as the effective mass scaling, but at higher energies in-medium NNCS are enhanced compared with free ones.
机译：通过传输模型研究了Z≤2粒子在重离子碰撞中以每核子数十至数百MeV的能量的椭圆流。新版的改进量子分子动力学模型（ImQMD05），并与实验结果进行了比较。通过在输运计算中应用不同的Skyrme相互作用，我们研究了核态方程（EOS）对椭圆流的影响。我们发现，在中能重离子碰撞中，椭圆流需要一个软状态方程。通过椭圆流和中能重离子碰撞中的核停止作用，研究了中等核子-核子截面的密度和能量依赖性。在低能量下，中型NNCS的行为与现象学表达以及有效的质量缩放相似，但在高能量下，中型NNCS的行为与自由型相比增强。

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