利用伴随α粒子能谱分析固体氚靶中氚浓度深度分布  

Depth Profile of Tritium Concentration in Solid Tritium Target Using Associated Alpha Particle Spectrum

作　　者：祝庆军[1] 鲍杰[2] 赖财锋[3] 朱通华[3] 高芳芳[1] 李佳[4] 刘松林[1] 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031 [2]中国原子能科学研究院核物理研究所,北京102413 [3]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [4]中国科学技术大学核科学技术学院,安徽合肥230027

出　　处：《原子能科学技术》2016年第9期1544-1549,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11175207);国家磁约束聚变专项资助项目(2015GB108002)

摘　　要：在目前的氘氚中子发生器源中子分析过程中,固体氚靶中氚浓度深度分布信息的缺失是普遍遇到的问题。为解决此问题,本文建立了利用伴随粒子能谱反演氚浓度深度分布的模型,采用来自氚钛靶的α实验能谱作为模型测试对象,通过该模型获得了氚钛靶中氚浓度深度分布的数据。结果表明,氚浓度随氚钛靶深度的增加呈双峰趋势,两峰之间的氚浓度波谷位于靶中0.94μm处,该深度正是入射氘粒子的射程极限。所得的氚浓度深度分布趋势与其他实验方法测量结果相符,表明该模型能为氘氚中子发生器的源中子分析提供即时的氚浓度深度分布信息。Currently in the analysis of source neutron of D-T neutron generator,the lack of the information of the depth profile of tritium concentration in solid tritide target is a common problem.To overcome this problem,a inversion model to study the depth profile of tritium concentration in the source target using the associated alpha spectrum was built,the reported alpha spectrum from T（d,n）4 He reaction was used as a test inputfor the model,and the depth profile of tritium concentration in titanium tritide target was acquired.The results show that the depth profile of the tritium concentration in the titanium tritide target presents bimodal distribution,and the tritium concentration bottom between two peaks locates at 0.94μm of target thickness,which is the range limit of the inject deuterium ions.The similar trend was found in the available research using others techniques.The presented method can provide real-time depth profile of tritium concentration to source neutron analysis of the D-T neutron generator.

关 键 词：氚浓度深度分布 伴随粒子法 α能谱 氘氚中子发生器 

分 类 号：O572.353[理学—粒子物理与原子核物理] TL8[理学—物理]