Nanocrystalline Gd₂O₂S:Pr powders were successfully synthesized by the co-participation method. The changes of size, shape and luminescence properties of these nanocrystalline powders were studied under different gamma doses (0–50 kGy) during the synthesizing process. Also, the structural, morphology and luminescence properties of these nanocrystalline powders were characterized using the X-ray diffraction, field emission scanning electron microscopy, energy dispersion of X-ray spectroscopy, photoluminescence, and thermoluminescence. The XRD results confirmed that the nanocrystalline Gd₂O₂S:Pr powders have a pure hexagonal structure with the high crystallinity at a temperature of 900 °C, and the gamma radiation doses have no effect on the structure. The SEM images showed that the nanocrystalline Gd₂O₂S:Pr powders have a spherical shape and are agglomerated when the irradiation dose increases. These nanopowders, which were prepared at an irradiation dose of 40 kGy, show the lowest crystallite size and hence the highest intensity of emission peaks at the wavelengths of 506, 515 and 671 nm, which are corresponded to the transitions of the ³P₁–³H₄, ³P₀–³H₄ and ³P₀–³F₂ of Pr ions, respectively. The X-ray radiography image was obtained by the screen of Gd₂O₂S:Pr nanopowders (prepared at 40 kGy gamma dose), coupled with a radiographic film. The TL glow curves of the sample, prepared at 40 kGy gamma dose, were recorded under the X-ray irradiation in the times of 5 and 10 min. The heating rate and preheat temperature were obtained 2 and 50 °C, respectively. The obtained results were investigated in details.

通过共参与法成功合成了纳米晶Gd ₂ O ₂ S:Pr粉末。在合成过程中，研究了这些纳米晶粉末在不同伽马剂量（0-50 kGy）下的尺寸、形状和发光特性的变化。此外，使用 X 射线衍射、场发射扫描电子显微镜、X 射线光谱的能量色散、光致发光和热致发光对这些纳米晶粉末的结构、形态和发光性质进行了表征。XRD 结果证实纳米晶 Gd ₂ O ₂S:Pr粉末具有纯六方结构，在900°C的温度下具有高结晶度，伽马辐射剂量对结构没有影响。SEM 图像显示纳米晶 Gd ₂ O ₂ S:Pr 粉末呈球形，当照射剂量增加时会发生团聚。这些在 40 kGy 辐射剂量下制备的纳米粉末显示出最低的微晶尺寸，因此在 506、515 和 671 nm 波长处的发射峰强度最高，这对应于³ P ₁ – ³ H ₄ , ³ P ₀ – ³ H ₄和分别为Pr离子的³ P ₀ – ³ F ₂。X 射线射线照相图像是通过 Gd ₂ O ₂ S:Pr 纳米粉末（以 40 kGy 伽马剂量制备）的屏幕与射线照相胶片结合获得的。在 5 分钟和 10 分钟的 X 射线照射下，记录了在 40 kGy 伽马剂量下制备的样品的 TL 辉光曲线。加热速率和预热温度分别为 2 和 50 ℃。对所得结果进行了详细研究。