基于Geant4的裂变核素中子角关联分布数值模拟  

Numerical Simulation of Geant4-based Neutron Angular Correlation Distribution of Fission Nuclides

作　　者：王鹏 黎素芬 王飞 李凯乐 WANG Peng;LI Sufen;WANG Fei;LI Kaile(Rocket Force University of Engineering,Xi’an 710025,Shaanxi)

机构地区：[1]火箭军工程大学核工程学院,陕西西安710025

出　　处：《火箭军工程大学学报》2024年第4期98-107,共10页Journal of Rocket Force University of Engineering

摘　　要：为了打破目前通过实验手段对中子角关联进行测量时受到实验条件限制的问题,使用蒙特卡洛方法,依托Geant4软件搭建了一套中子角关联测量模型,对235U、238U、239Pu、240Pu以及252Cf进行数值模拟,得到了这5种裂变核素的中子角关联分布。结果表明:在相同条件下,不同裂变核素之间的中子角关联分布存在差异;使用测量模型得到的不同核素中子角关联分布与国外实验结果重合度较高。To solve the problem that the measurement performance of neutron angular correlation by experimental means is always restrained by experimental conditions,a set of neutron angular correlation measurement model was built by Monte Carlo method and Geant4 software.Based on the proposed models,the neutron angular correlation distributions of 235U,238U,239Pu,240Pu and 252Cf were obtained by numerical simulation.Results showed that under the same conditions,there are differences in the distribution of neutron angular correlation among different fission nuclides.The neutron angular correlation distribution of different nuclides obtained by the proposed models is in good agreement with abroad experimental results.

关 键 词：核材料裂变核素 中子角关联分布 Geant4软件 测量模型 

分 类 号：TL77[核科学技术—辐射防护及环境保护]