D-T中子发生器用氚钛靶的存储时间对其结构稳定性的影响  

Influence of Storage Time of Tritium Titanium Target on Its Structural Stability in a D-T Neutron Generator

作　　者：刘洋[1] 杨涛[1] 王旋[1] 吴凤娟[1,2] 刘际伟[2] 王博宇[2] 

机构地区：[1]西南科技大学,四川绵阳621010 [2]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2017年第6期1731-1733,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(11505145;11205136;61505169);西南科技大学校博士基金(14zx7166)

摘　　要：氚钛靶是D-T中子发生器的重要元部件,氚钛靶在存储过程中存在着内部氚衰变并积累氦的过程,氦泡的形成将对氚钛膜的稳定性产生重要影响,因此研究存储数年的氚钛靶的辐照损伤效应对了解氚钛靶的有效使用寿命有重要意义。采用扫描电镜及其附带的能谱和X射线衍射对氚钛靶表层进行检测发现:束流辐照以后氚钛靶表层元素主要为Mo和少量的Ti,表面不存在任何氚化物的物相结构。结果表明:氚钛靶在长达12年的存储时间内,表层氚化钛有效层存在大量脱落的现象。Tritium titanium target is an important assembly used in a D-T type neutron generator,the coexistence of the decayed helium and hydrogen isotope is inevitable in tritium-contained materials,and the stability of the tritium titanium target is influenced by the inner evolution of helium bubbles.It is therefore of essence to study the effect of ion irradiations on the lifetime of tritium titanium targets with a long storage time in a neutron generator.The surface morphologies,surface element types and surface phase structures were analyzed for the original or irradiated tritide targets.Results show that Mo and Ti are the main elements remaining on the irradiated surface,and hardly any trace of Ti or Ti Tx could be detected on the surface.It is concluded that after a storage time of nearly 12 years,the main part of the tritide film are striped by inner evolved helium bubbles.

关 键 词：氚钛靶 物相结构 表面形貌 中子发生器 辐照效应 

分 类 号：O571.53[理学—粒子物理与原子核物理]