Two methods are examined for extending the life of tritium targets for production of 14 MeV neutrons by the ³H(²H,n)⁴He nuclear reaction. With thick film targets the neutron production rate decreases with time due to isotope exchange of tritium in the film with implanted deuterium. In this case, the target life is maximized by operating the target at elevated temperature where the implanted deuterium mixes by thermal diffusion throughout the entire thickness of the film. The number of neutrons obtained from a target is then proportional to the initial tritium content of the film. A novel thin-film target design was also developed and tested. With these thin-film targets, the incident deuterium is implanted through the tritide into the underlying substrate material. A thin permeation barrier layer between the tritide film and substrate, reduces the rate of tritium loss from the tritide film. Good thin-film target performance was achieved using W and Fe for the barrier and substrate materials respectively. Thin-film targets were fabricated and tested and shown to produce similar number of neutrons as thick-film targets while using only a small fraction of the amount of tritium.

³ H（² H，n）⁴检验了两种方法来延长产生14 MeV中子的targets靶的寿命他核反应。使用厚膜靶时，由于注入氘的薄膜中of的同位素交换，中子产率随时间降低。在这种情况下，通过在较高的温度下操作靶材，可以使靶材寿命最大化，在高温下，注入的氘通过热扩散在整个膜的整个厚度中混合。然后，从靶获得的中子数量与薄膜的初始tri含量成正比。还开发并测试了新颖的薄膜靶设计。对于这些薄膜靶，入射de通过through离子注入下面的衬底材料中。在t化物膜和衬底之间的薄渗透阻挡层降低了from化物膜中loss的损失率。使用W和Fe分别作为阻挡层和衬底材料，可以获得良好的薄膜靶性能。薄膜靶材经过制造和测试，并显示出与厚膜靶材相似数量的中子，而仅使用少量的tri。