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和中高能重离子碰撞相比,低能重离子碰撞中的弹靶结构效应起着更为重要的作用,因此要求输运模型能够对核的基态性质给出更合理的描述。利用扩展的量子分子动力学(EQMD)模型计算了从轻到重不同质量区不同同位素链的结合能及方均根半径等基态性质,并与实验值进行了比较,发现EQMD模型不仅能够非常好地重现稳定核的基态性质,而且能够合理地描述远离β稳定线核的基态结合能,因此相比于IQMD,CoMD,ImQMD等其他QMD版本,EQMD模型对初始化核稳定性的描述也有了极大改善。这为利用微观动力学模型研究弱束缚核在低能区引起的弹性散射、熔合、转移及破裂等反应机制提供了基础。
The effect of the structure of the projectile on the low-energy heavy ion collisions plays a more important role than that of the high-energy heavy ion collisions. Therefore, the transport model is required to give a more reasonable description of the ground state properties of the nuclei. Using the extended quantum molecular dynamics (EQMD) model, the ground state properties such as the binding energy and the root mean square radius of different isotope chains from light to heavy are calculated and compared with the experimental data. It is found that the EQMD model can not only reproduce very well Now stabilizes the ground state properties of the nuclei and can reasonably describe the ground state binding energy far away from the beta stable nucleus and therefore the EQMD model has greatly improved the description of the initial nuclear stability compared to other QMD versions such as IQMD, CoMD, ImQMD . This provides a basis for the study of the reaction mechanism of weakly-bound nuclei in the low-energy region such as elastic scattering, fusion, transfer and rupture using the micro-dynamics model.