EPR spectroscopic study of UV and gamma-irradiated potassium persulfate, K₂S₂O₈, a dosimeter candidate in pellet form was reported. The importance of the radical structure that was studied in this work is the sensitivity against radiation from UV rays from Xenon lamp and gamma rays from Co-60 source, that is energies at eV to MeV. Powder EPR spectra reflect the anisotropy of both g and dipolar. The dose-response is supposed to be linear for UV radiation in the dose range under study and nearly linear for gamma rays from zero to 35 kGy dose. In addition, the radical structure is highly stable at room temperature and heat treatment up to 140 °C for artificial aging does not notably affect the intensity, and the original spectra are recovered when it cooled down to room temperature. Electrostatic repulsion between electrons of radical pair keeps the electrons in their locations, prevent recombination, and hence radical pair becomes stable for long. Thus, UV and gamma-irradiated potassium persulfate can be estimated as a valuable EPR dosimeter candidate material.

报道了对紫外线和伽马辐射过的过硫酸钾 K ₂ S ₂ O _{8 的}EPR 光谱研究，K ₂ S ₂ O ₈是颗粒形式的候选剂量计。在这项工作中研究的自由基结构的重要性是对来自氙灯的紫外线和来自 Co-60 源的伽马射线辐射的敏感性，即 eV 到 MeV 的能量。粉末EPR谱反映两者的各向异性克和偶极。在研究的剂量范围内，紫外线辐射的剂量反应应该是线性的，而对于 0 到 35 kGy 剂量的伽马射线，剂量反应应该是线性的。此外，自由基结构在室温下高度稳定，人工时效高达140°C的热处理对强度没有显着影响，冷却至室温后可以恢复原始光谱。自由基对电子之间的静电排斥使电子保持在它们的位置，防止复合，因此自由基对长期稳定。因此，紫外线和伽马辐照过的过硫酸钾可以被认为是一种有价值的 EPR 剂量计候选材料。