氚靶片核素组成对氘氚中子源强的影响  

Influence of Nuclide Composition of Tritium Target on D-T Neutron Intensity

作　　者：张思纬[1,2] 王永峰 王伟[1] 季翔[1] 王志刚[1] 刘超[1] 吴宜灿[1] FDS凤麟团队[1] ZHANG Siwei;WANG Yongfeng;WANG Wei;JI Xiang;WANG Zhigang;LIU Chao;WU Yican;FDS Team(Key Laboratory of Neutronics and Radiation Safety,Institute of Nuclear Energy Safety Technology,Chinese Academy of Sciences,Hefei of Anhui Prov. 230031,China;University of Science and Technology of China,Hefei of Anhui Prov. 230031,China)

机构地区：[1]中国科学院核能安全技术研究所中子输运理论与辐射安全重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《核科学与工程》2019年第3期389-395,共7页Nuclear Science and Engineering

基　　金：中国科学院战略性先导科技专项(NO.XDA14020503);国家自然科学基金(NO.21773250)

摘　　要：氘氚中子源通过氘离子束轰击氚靶片引发氘氚聚变反应,产生 14.1 MeV 高能中子。高能中子调控后亦可产生宽能谱中子场,是先进核能及核技术交叉应用研究的重要实验平台。作为中子源的核心部件,氚靶片由靶片基底和储氚薄膜组成,其中储氚薄膜的核素组成会影响氚原子密度与入射氘离子射程,最终直接关系到中子源强的高低。本文基于 MATLAB 和 SRIM 软件建立氘氚中子源强计算模型,对比计算了不同新型储氢金属材料组成的储氚薄膜(TiT2、MgT2、Mg2NiT4、VT2、LiBT4和 LaNi5T6)和不同氘离子能量对中子源强的影响。计算结果表明,在同等束流条件下,MgT2的中子源强相比 TiT2可提高 30%以上,且制备工艺较为成熟,是氘氚中子源的优秀储氚薄膜材料。Deuterium-tritium(D-T)neutron source employs a deuterium ion beam to bombard a tritium target. With D-T fusion reaction,this source can generate 14.1 MeV high-energy fusion neutrons,as well as neutron field with wide energy spectrum after neutron control technology. It is a significant neutronic experimental platform for researches of advanced nuclear energy and nuclear technology application. As one of the core components of D-T neutron source,tritium target is composed of substrate and tritium storage film,and the latter will directly affect the neutron intensity,due to different nuclide compositions,followed by the the tritium atomic density and the range of incident deuterium. This article calculate the D-T neutron intensity with various nuclide compositions of tritium storage film(TiT2,MgT2, Mg2NiT4,VT2,LiBT4 and LaNi5T6),as well as different energies of deuterium ions,based on the D-T neutron intensity calculation model with SRIM and MATLAB programs. The results show the neutron intensity of MgT2 film is 30% higher than TiT2 film,under the same beam condition. Since the preparation process is relatively mature,MgT2 can be a better tritium storage film for D-T neutron source.

关 键 词：氘氚中子源 氚靶片 中子源强 新型储氢金属材料 

分 类 号：O571.53[理学—粒子物理与原子核物理]