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裂变中子角关联分布和其他符合特征是核材料特征的敏感指针,在核参数研究、核模型研究、军控核查技术研究等领域中有重要应用。一般的中子输运数值模拟软件使用“平均裂变模型”近似处理裂变过程,不能准确给出中子多重性、中子关联角分布等关联特征。为了实现对自发裂变中子源能量、多重性和中子角关联分布的数值模拟能力,我们开发了根据裂变过程,逐步给出裂变中子多重性、能量和角分布等参数的NESF数值模拟程序,并将该程序集成到现有中子输运软件之中。本报告重点介绍我们开发的用于模拟自发裂变中子源能量、多重性和中子角关联分布的程序的背景、物理依据、程序流程,以及基于该程序开展的中子角关联分布特征与核部件特征关联的数值模拟研究。
The fission neutron angle correlation distribution and other conforming features are sensitive pointers to the characteristics of nuclear materials. They have important applications in nuclear parameter research, nuclear model research and military control verification technology research. The general neutron transport numerical simulation software uses the “average fission model” to approximate the fission process and can not accurately give the neutron multiplicity and neutron correlation angle distribution. In order to realize the numerical simulation ability of spontaneous fission neutron source energy, multiplicity and neutron angular distribution, we developed a NESF numerical simulation program based on the fission process and gradually giving parameters such as fission neutron multiplicity, energy and angular distribution , And integrate the program into existing neutron transport software. This report focuses on the background, physical basis, and program flow of the programs we developed to simulate the spontaneous fission neutron energy, multiplicity, and neutron angular distribution, and the characteristics of neutron angular distribution and nuclei Research on Numerical Simulation of Component Feature Correlation.