Cement is an important component of concrete used as a shielding material in nuclear accelerators and reactors. Hence cement samples should be analysed for the presence of certain trace elements that may get activated by neutrons emitted during the production of radioisotopes in an accelerator, so as to minimize the low level radioactive waste to be handled during decommissioning. With this motivation the present work was undertaken and 44 samples of five broad classes of cements were analysed for natural radioactivity (226Ra, 232Th & 40K) and trace elements capable of generating long lived gamma radioactivity due to neutron activation.

中文翻译：

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水泥中能够产生长寿命γ射线活性的天然放射性和微量元素含量的研究

水泥是混凝土的重要成分，用作核加速器和反应堆的屏蔽材料。因此，应分析水泥样品中是否存在某些微量元素，这些元素可能会被加速器中放射性同位素生产过程中释放的中子激活，从而最大限度地减少退役期间要处理的低放射性废物。本着这一动机，我们开展了目前的工作，对 5 大类水泥的 44 个样品进行了天然放射性（226Ra、232Th 和 40K）和能够因中子活化而产生长寿命伽马放射性的微量元素分析。