中文摘要：

为研究放射性核素固化介质备选矿物锆英石的抗1射线辐照结构稳定性，以澳大利亚锆英石为研究对象，通过^60Co源γ射线辐照装置对样品施以1728 kGy的1射线辐照．利用X射线荧光光谱仪、扫描电子显微镜和X射线衍射仪对样品的元素含量、γ射线辐照前后的微观形貌及物相变化进行表征，同时利用Rietveld方法对γ射线辐照前后的样品进行了结构精修．结果表明：澳大利亚锆英石经1728 kGy剂量的γ射线辐照后未发生物相变化，射线辐照前后样品的晶胞参数仅发生了10^-4А量级的变化，样品辐照后表面形貌未发现被明显损伤迹象．表明γ射线对锆英石晶体结构无序化程度影响有限，锆英石具有较好的抗γ射线辐照结构稳定性．

英文摘要：

In order to investigate the structural stability for zircon in mothball waste form of radionuclide to resist γ-ray irradiation, the zircon crystals, which are collected from Australia, are studied. The crystal grains are irradiated by a^60 Co γ-ray source with 1728 kGy doses. The chemical compositions of zircons are analyzed by X-ray fluorescence spectrometry （XRF）. Moreover, phases, structures and microstructures of the samples before and after γ-ray irradiation are characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results indicate that the new phases are not found in the crystals before and after γ-ray irradiation with 1728 kGy. The crystal cell parameters change by 10^-4А before and after irradiation. Moreover, no obvious damage to the structure is found in the zircon irradiated by γ-ray with 1728 kGy dose. So, the zircon possesses a better capability to resistγ-ray irradiation which hardly influence the degree of disorder for zircon.