大入射能量范围内重离子输运过程的动力学性质研究
Dynamics of Heavy Ion Collisions within a Large Energy Regime
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摘要: 基于一个改进的微观动力学输运模型——极端相对论量子分子动力学（UrQMD）， 较为系统地研究了从SIS能区到AGS和SPS能区， 再到RHIC能区， 入射能量跨5个数量级的重离子核反应及多个人们感兴趣的实验观测量， 如粒子产额、 集体流、 核阻止以及两粒子HBT关联等。研究表明， 不论单粒子观测量， 还是两粒子关联观测量， 都能自洽地由同一个输运模型加以描述。Based on one updated microscopic transport model Ultrarelativistic Quantum Molecular Dynamics (UrQMD) with modifications of both potentials and twobody scattering cross sections, quite a few interesting observables, such as yields, collective flows, the nuclear stopping, and the HBT twoparticle interferometry, are systematically investigated for heavy ion collisions within a large beam energy regime of five orders of magnitude (from SIS, AGS, SPS up to RHIC). It is shown that a consistent explanation can be received from both singleparticle and twoparticle related observables.Abstract: Based on one updated microscopic transport model Ultrarelativistic Quantum Molecular Dynamics (UrQMD) with modifications of both potentials and twobody scattering cross sections, quite a few interesting observables, such as yields, collective flows, the nuclear stopping, and the HBT twoparticle interferometry, are systematically investigated for heavy ion collisions within a large beam energy regime of five orders of magnitude (from SIS, AGS, SPS up to RHIC). It is shown that a consistent explanation can be received from both singleparticle and twoparticle related observables.
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