Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Centre for Application of Radioisotopes and Radiation Technology (CARRT), Mangalore University, Mangalagangothri, Karnataka, India.
Luminescence. 2022 May;37(5):828-836. doi: 10.1002/bio.4227. Epub 2022 Mar 29.
Motivated by our previous study on Sm ions as thermoluminescence (TL) sensitizers to the BaO-ZnO-LiF-B O -Yb O glass system, in the current study we examined the effect of Er ion co-doping on the TL characteristics of this glass system. The 4f-4f electronic transitions of the Er and Yb ions were confirmed via the optical absorption spectrum. Notably, the use of Yb -Er ions failed to improve the TL intensity, sensitivity, and trap density. However, they enabled the glass system to function as an activator-quencher system. The linearity range and effective atomic number remained unaffected after co-doping. In addition, the problem of anomalous fading caused a remnant signal of just 58% after a week of storage of the Yb monodoped glass. This was resolved by the optimum co-doping of Er ions to achieve an 89% signal. The co-doping of Er ions to the BaO-ZnO-LiF-B O -Yb O glass system regulated its thermal stability and therefore supplemented its potential for radiation monitoring in food processing and retrospective dosimetry.
受我们之前关于 Sm 离子作为热释光 (TL) 敏化剂对 BaO-ZnO-LiF-B2O-Yb2O 玻璃系统的研究的启发，在当前的研究中，我们研究了 Er 离子共掺杂对该玻璃系统 TL 特性的影响。通过光学吸收光谱证实了 Er 和 Yb 离子的 4f-4f 电子跃迁。值得注意的是，Yb-Er 离子的使用并未提高 TL 强度、灵敏度和陷阱密度。然而，它们使玻璃系统能够作为激活剂-猝灭剂系统发挥作用。共掺杂后线性范围和有效原子数保持不变。此外，异常褪色问题导致仅在一周的 Yb 单掺杂玻璃储存后，残余信号仅为 58%。通过最佳的 Er 离子共掺杂解决了这个问题，实现了 89%的信号。Er 离子共掺杂到 BaO-ZnO-LiF-B2O-Yb2O 玻璃系统中调节了其热稳定性，因此补充了其在食品加工和回溯剂量学中辐射监测的潜力。
