室温下,将能量为250 keV He+离子注入z切钽酸锂单晶,注量范围为5.0×1014～5.0×1016He+/cm2,应用三维轮廓仪、X射线衍射(XRD)、紫外可见(UV-Vis)光学吸收谱对未注入和注入样品进行了表征和分析.分析结果表明,在注量达到5.0×1016 He+/cm2时,样品表面出现大量凸起条纹,同时晶格沿着[001]方向出现明显肿胀,吸收边则表现出明显的注量相关性.注入样品在空气中放置60 d后,最高注量的样品表面原来凸起的条纹变为细长的裂纹,晶格应变及光学吸收边均出现较大的恢复.讨论了样品表面形貌、晶格应变和光学吸收边与He行为的关系.
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