计算物理 ›› 1994, Vol. 11 ›› Issue (3): 321-327.

• 论文 • 上一篇    下一篇

垒下重离子诱发裂变的Monte Carlo模拟

钱兴1, 江栋兴1, 叶沿林1, 许谨诚2, 刘祖华2, 张焕乔2   

  1. 1. 北京大学技术物理系, 北京 100871;
    2. 中国原子能研究院, 北京 102413
  • 收稿日期:1993-01-20 出版日期:1994-09-25 发布日期:1994-09-25

A MONTE CARLO SIMULATION FOR THE HEAVY-ION INDUCED FISSION AT SUB-BARRIER ENERGIES

Qian Xng1, Jiang Dongxing1, Ye Yanlin1, Xu Jincheng2, Liu Zuhua2, Zhang Huanqiao2   

  1. 1. Department of Technical Physcis, Peking University, 100871;
    2. Institute of Atomic Energy, Beijing 102413
  • Received:1993-01-20 Online:1994-09-25 Published:1994-09-25

摘要: 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Monte Carlo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。

关键词: 转移裂变, 复合核裂变, 裂变碎片角分布, 裂变碎片角关联

Abstract: A Monte 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 experiment planning and analysis.

Key words: transfer-fission, complete fusion-fission, fission fragment, angular distribution, fission fragment angular correlations

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