In this study, we report the phenomenon of radioluminescence (RL) in ZnO-Eu₂O₃ binary oxide ceramics. RL results showed the presence of a wide emission band in the visible region centered at 530 nm and a well-defined peak at 610 nm. The emission band is originated due to energy levels created by intrinsic defects inside the bandgap of ZnO. On the other hand, the peak is related to the ⁵D₀ → ⁷F₂ transition in the Eu³⁺ ion, which is possible through the energy transfer mechanism between ZnO and Eu₂O₃. The RL spectra presented a linear behavior as a function of the electric current or voltage applied in the X-ray tube.

中文翻译：

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ZnO-Eu ₂ O ₃陶瓷中4f跃迁引起的红色发射

在这项研究中，我们报告了ZnO-Eu ₂ O ₃二元氧化物陶瓷中的放射致发光（RL）现象。RL结果表明，可见光区在以530 nm为中心存在宽发射带，在610 nm处存在明确的峰。发射带是由于ZnO带隙内部的固有缺陷产生的能级而产生的。另一方面，该峰与Eu ³⁺离子中的⁵ D ₀ → ⁷ F ₂跃迁有关，这可能是通过ZnO和Eu ₂ O ₃之间的能量转移机制实现的。。RL光谱呈现出线性行为，该线性行为是施加在X射线管中的电流或电压的函数。