对中能重离子碰撞碎块形成过程中核结构效应的研究

Study of the Structure Effect in FragmentFormation Process in HIC

在一般的量子分子动力学模型（ＱＭＤ）的基础上，通过考虑重构模型（ＲＡＭ），中子、质子区分，核子费米性质的描述以及利用摩擦冷却方法（ＦＣＭ）来对核基态抽样，得到一种改进的量子分子动力学模型（ＭＱＭＤ）．然后，在改进的量子分子动力学模型的基础上研究了１２Ｃ＋１２Ｃ在Ｅｌａｂ＝２８．７ＭｅＶ／ｕ时一些同位素的分布及其时间稳定性．结果表明，改进的量子分子动力学模型能够很好地描述重离子碰撞中碎块形成的核结构效应．

Based on usual QMD, by considering restructured aggregation model, neutron andproton disdinghshing, description of the fermionic behavior of nucleons and frictionalcooling method, a new kind of MQMD is proposed. The distribution and time stability of some isotopes in reaction 12C+12C at Elab=28.7MeV/u are studied by thismodel. The results show that this new MQMD can well describe the structure effectin the fragment formation in HIC.