本项目利用已经发展起来的两步模型分析重离子熔合过程中的准裂变和裂变过程，以及计算超重核的剩余截面。用双中心壳模型计算弹核和靶核在各种形变参数下的壳修正能量，并将该能量加入至液滴能曲面中，从而形成较为真实的势能曲面。在此基础上分析熔合阻止的存在机制以及存在的区域，定量分析内部位垒的高度。利用Langevin方程分析弹靶从入射到形成复合核的整个过程，研究粒子在曲面上的运动，从而计算准裂变碎片的分布和以及复合核形成概率。利用Lagevin方程，我们还将在多维宏观-微观模型的基础上分析复合核裂变的动力学过程，研究裂变的质量碎片分布，探讨裂变位垒对剩余截面的影响。在新的多维能量曲面下寻找超重核的合成途径，提出实验上有实现可能的弹靶组合和入射能量。初步探索非轴对称体系质量参数和粘滞系数的计算，研究复合核非轴对称裂变的可能性。

The quasi-fission and fission process, and the residue cross sections of super-heavy nuclei in heavy ion reactions will be analysed by the established two-step model. We get more realistic potential by adding the shell correction energy of two-center model in different shapes into corresponding liquid drop potential. Based on the energy surface the mechanism and existing area of fusion hindrance will be discussed, and calculate quantitatively the height of the barrier inner side of the Coulomb barrier. Using the Langevin equation we will analyze the hole process from injection to fusion between the projectile and target, study the traces of the system on the energy surface, and then calculate the mass fragment distribution of quasi-fission and fusion probability. Based on the Langevin equations and multi-dimensional energy surface for a given reaction, we will also study the hydrodynamical process of fission starting from the compound state, calculate the mass distribution of fission, discuss the effect of the fission barrier on the residue cross section. We will also try to find several optimal reactions and corresponding incident energy to form super-heavy nuclei. In the end, a method calculating the mass parameter and viscosity coefficient of a non-axial system will be proposed, and its application to fission process will be studied.