Materials in a high radioactive environment undergo structural changes. X-ray diffraction (XRD) is commonly used to study the micro-structural changes of such materials. Therefore, a safe procedure is required for the preparation of specimens. In this paper, a simple methodology for the preparation of radioactive powder specimens to be analyzed in a non-nuclearized laboratory diffractometer is presented. The process is carried out inside a shielded glove box, where the milling of the radioactive sample and specimen preparation occurs. Minimum amount of sample is required (<20 mg), which is drop-casted on a polyether ether ketone (PEEK) foil and glue-sealed inside a disposable plastic holder for a safe handling of the specimen. One example using neutron-irradiated granite is shown, where unit-cell parameters and crystal density of the main phases were calculated. The developed methodology represents an easy and affordable way to study neutron irradiated materials with low activity at laboratory scale.

中文翻译：

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放射性物质 X 射线粉末衍射分析样品的简单制备：辐射花岗岩的说明性示例

高放射性环境中的材料会发生结构变化。X射线衍射（XRD）通常用于研究此类材料的微观结构变化。因此，样品的制备需要安全的程序。本文提出了一种制备放射性粉末样品并在非核化实验室衍射仪中进行分析的简单方法。该过程在屏蔽手套箱内进行，在此进行放射性样品的研磨和样品制备。需要最小量的样品（<20 毫克），将其滴注在聚醚醚酮 (PEEK) 箔上，并用胶密封在一次性塑料支架内，以便安全处理样本。展示了一个使用中子辐照花岗岩的示例，其中计算了主相的晶胞参数和晶体密度。所开发的方法代表了一种在实验室规模研究低活性中子辐照材料的简单且经济的方法。