Consequences of a covariant description of heavy-ion reactions at intermediate energies.
Consequences of a covariant description of heavy-ion reactions at intermediate energies.
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DOI：
10.1103/physrevc.51.2113
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发表时间：
1995-02
期刊：
影响因子：
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通讯作者：
E. Lehmann;R. Puri;A. Faessler;G. Batko;S. W. Huang
中科院分区：
文献类型：
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作者：
E. Lehmann;R. Puri;A. Faessler;G. Batko;S. W. Huang
用一种新的相对论量子分子动力学(RQMD)程序研究了中能重离子碰撞，该程序是量子分子动力学(QMD)方法的协变推广。我们表明，在非相对论极限(即50 MeV/核子)下，这种新的实现能够产生与非协变QMD相同的结果。这样的比较在文献中是不存在的。在较高能量下(即1.5GeV/核子和2GeV/核子)，RQMD和QMD对于相空间的时间演化给出了不同的结果，例如对于定向横流。这些差异表明，在RQMD框架内对重离子反应进行协变描述的结果即使在中等能量下也是存在的。
Heavy-ion collisions at intermediate energies are studied by using a new relativistic quantum molecular dynamics (RQMD) code, which is a covariant generalization of the quantum molecular dynamics (QMD) approach. We show that this new implementation is able to produce the same results in the nonrelativistic limit (i.e., 50 MeV/nucleon) as the noncovariant QMD. Such a comparison is not available in the literature. At higher energies (i.e., 1.5 GeV/nucleon and 2 GeV/nucleon) RQMD and QMD give different results in respect to the time evolution of the phase space, for example for the directed transverse flow. These differences show that consequences of a covarient description of heavy-ion reactions within the framework of RQMD exist even at intermediate energies.