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用核反应分析(NRA)、前向反冲分析法(ERD)、背散射谱法(RBS)等离子束分析方法研究了TiDx/Mo样品中氘的行为。结果表明,在以化学形式存在的TiDx/Mo样品中氘均匀分布。在TiD1.5/Mo膜表面存在一层26nm的氧化层,氧含量为1.4×1017cm-2。达到氘化钛大量明显分解温度(343℃)时,氘在氘化钛中扩散系数为2.3×10-8cm2/s,表面复合系数为1.9×10-27cm4/s。扩散系数与温度呈指数关系D=D0e-E/kT。随着表面氧含量的增加,氘在氘化钛表面复合系数逐渐减小。在TiD1.5/Mo样品表面镀上一层约80nm的铜膜后,复合系数增大。
Deuterium behavior in TiDx / Mo samples was studied by nuclear reaction analysis (NRA), forward recoil analysis (ERD), backscatter spectroscopy (RBS) and plasma beam analysis. The results show that deuterium is uniformly distributed in the chemically-present TiDx / Mo samples. There is a 26nm oxide layer on the surface of TiD1.5 / Mo film with an oxygen content of 1.4 × 1017cm-2. The deuterium diffusion coefficient in deuterated titanium was 2.3 × 10 -8 cm 2 / s and the surface recombination coefficient was 1.9 × 10 -2 7 cm 4 / s when a large amount of apparent decomposition temperature (343 ° C) of deuterated titanium was reached. Diffusion coefficient and temperature exponential relationship D = D0e-E / kT. With the increase of surface oxygen content, the deuterium composite coefficient on the surface of deuterated titanium gradually decreases. After the TiD1.5 / Mo sample is coated with a layer of about 80nm copper film, the recombination coefficient increases.