التفاصيل البيبلوغرافية
| العنوان: |
γ-ray shielding effect on the time resolved orange-red phosphorescence of nanoscale gadolinium orthovanadates upon Eu3+ doping. |
| المؤلفون: |
Ansari, Aftab1 (AUTHOR) aftyfi9@gmail.com, Karmakar, Sudip2 (AUTHOR), Pramanik, Gautam2 (AUTHOR), Mohanta, Dambarudhar3 (AUTHOR), Saha, Abhijit2 (AUTHOR) |
| المصدر: |
Hyperfine Interactions. Dec2024, Vol. 245 Issue 1, p1-18. 18p. |
| مصطلحات موضوعية: |
*LUMINESCENCE quenching, *CHARGE transfer, *BEHAVIORAL assessment, *DOPING agents (Chemistry), *ION energy |
| مستخلص: |
In a first, we report the luminescence profiling of the Eu3+ doped GdVO4 nanostructures considering varied dopant concentration and upon exposure to multiple gamma irradiation dosages. Following well established excitation route for the system with two major excitation bands assigned to Eu3+–O2− and V5+–O2− charge transfer, the emission profiles reflects dominant nature of the electrically driven transition (5D0→7F2). Captivatingly, luminescence quenching effects were observed and the critical dopant concentration was determined (3 mol%). The inter-activator distance was calculated to be ∼ 1.86 Å for maximum red to orange emission intensity ratio of ∼ 4.78. Remarkably, luminescence quenching/shielding properties are observed following irradiation and is attributed to partial transfer of excitation/emission energy of activator ions towards the defect centres/trapped charges. Moreover, an interesting feature was observed wherein the emission lifetime displayed quenching following irradiation. The article provides a detailed and in depth analysis of the phosphorescent behaviour of the GdVO4:Eu3+ nanostructures under high γ-radiation exposure in a comprehensive manner. The novel material can be applied as a nanophosphor that can withstand high radiation environments. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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