极强中子场中(n,2n)反应对235U裂变产额的影响  

Effects of(n,2n)Reactions on 235U Fission Yieldsin Extremely High Neutron Flux Density Field

作　　者：冯晶[1] 杨毅[1] 刘世龙[1] 鲍杰[1] 阮锡超[1] FENG Jing;YANG Yi;LIU Shi-long;BAO Jie;RUAN Xi-chao(Nuclear Data Key Laboratory,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,核数据重点实验室,北京102413

出　　处：《现代应用物理》2020年第1期19-24,共6页Modern Applied Physics

摘　　要：为研究极强中子场条件下,裂变产物因发生(n,2n)反应导致的裂变产额变化,本文建立了一个简化的强中子场模型,计算了(n,2n)反应引起147和99质量链产额的变化。结果表明,极强中子场条件下,(n,2n)反应引起147和99质量链裂变产额的变化率分别为-1%和0.4%。To study the fission yields of fission products generated by(n,2n)reactions in extremely high neutron flux density,a simplified model of extremely high neutron flux density field is constructed and the variation of mass chain yields of 147 and 99 caused by(n,2n)reactions is calculated.The results show that the variation ratios of fission yields for 147 and 99 mass chain are-1%and 0.4%,respectively.

关 键 词：裂变产额 强中子场 (n 2n)反应 

分 类 号：TL277[核科学技术—核燃料循环与材料]