垒下重离子诱发裂变的MonteCarlo模拟

A MONTE CARLO SIMULATION FORTHE HEAVY-ION INDUCED FISSION ATSUB-BARRIER ENERGIES

在简单的物理模型下建立了描述垒下重离子诱发裂变过程的ＭｏｎｔｅＣａｒｌｏ模拟程序，用于计算转移裂变和复合核裂变碎片的质量、核电荷数、能量及角度分布和角关联．模拟中考虑了在不同反应道中碎片物理量的坐标系变换，各物理量分布产生的运动学效应以及裂前中子发射和裂后碎片粒子蒸发对碎片角分布及角关联的影响，模拟结果可直接和实验测量进行比较，为在实验上区分转移裂变和复合核裂变，研究裂变碎片角分布各向异性异常提供辅助工具．

A Montel Carlo simulation code has been written for heaVy-ion induced fission at sub-barrier energies with a simple model. The final properties of the heavy fragmemts such as mass, charge, energy, angular distribution and angular correlation have been simulated for complete fuSion-fission and transfer-fission. The angles and velocities of the fragments relative to the recoil direction are given in the laboratory system. Consideration covers the combined kinematic effects of the distributions in mass energy and angular for the heavy fragments and Pre-scission, post-scission neutron emission. The code can be used as a tool for expetiment Planning and analysis.