利用同位旋相关的量子分子动力学模型,对中能重离子反应产物中的同位素分布进行了研究,重点分析了平均场中的动量相:关作用和两体碰撞的同位旋相关性对于产物中同位素标度现象的影响.结果表明:这两个因素均明显减小了同位素标度参量α的值,从而减弱了同位旋标度参量α对两个反应系统同位旋差的依赖性.
The influences of the isospin dependent in-medium nucleon-nucleon cross section and the Momentum- Dependent Interaction(MDI) on the isotope scaling have been investigated within the Isospin dependent Quantum Molecular Dynamics Model(IQMD). The results show that both the isospin dependent in-medium nucleon-nucleon cross section and the momentum interaction reduce the isoscaling parameter α appreciably, which means they decrease the dependence of yield ratios of two systems on the isospin difference between two systems.