The present work reports dose dependent influence of 8 MeV electron beam irradiation on the structural and optical properties of BaWO nanoparticles fabricated by chemical precipitation route. The synthesized materials were calcined at 400 °C for 3 h to get well defined nanocrystalline particles. The calcined materials were irradiated by 8 MeV electron beams of different doses and studied the influence of irradiation on the structural and optical properties of BaWO nanoparticles using various characterization tools. The structural studies revealed modifications of lattice parameters and unit cell volume, d spacing, crystallite size, micro-strain, and peak shift for major peaks of X-ray diffraction patterns of the electron irradiated samples. The electron irradiation also results some defects in the crystal lattice of BaWO nanocrystals upon electron beam irradiation. Scanning electron microscopic images demonstrated mesoporous behaviour of the BaWO materials. The optical studies established that optical bandgap and intensity of photoluminescence emission can be modified by using electron irradiation technique for potential applications in electronics. Photoluminescence emission properties of BaWO phosphors suggest that they are useful for the construction of near ultraviolet light excited blue light emitting diodes. Results explored from the present work constitute the first report for the dose-dependent influence of electron beam irradiation on the structure, optical absorption and photoluminescence properties of BaWO nanoparticles.

中文翻译：

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纳米相 BaWO4 荧光粉的结构和光学性质的改变：高能电子束辐照的剂量依赖性效应


目前的工作报告了 8 MeV 电子束照射对化学沉淀法制备的 BaWO 纳米颗粒的结构和光学性质的剂量依赖性影响。将合成的材料在 400°C 下煅烧 3 小时，以获得轮廓分明的纳米晶体颗粒。用不同剂量的 8 MeV 电子束辐照煅烧后的材料，并使用各种表征工具研究辐照对 BaWO 纳米颗粒结构和光学性能的影响。结构研究揭示了晶格参数和晶胞体积、d 间距、微晶尺寸、微应变和电子辐照样品的 X 射线衍射图样主峰的峰移的变化。电子束照射时，电子照射还会导致 BaWO 纳米晶体的晶格产生一些缺陷。扫描电子显微镜图像证明了 BaWO 材料的介孔行为。光学研究表明，可以通过使用电子辐照技术来改变光致发光发射的光学带隙和强度，以实现电子学中的潜在应用。 BaWO磷光体的光致发光发射特性表明它们可用于构建近紫外光激发的蓝色发光二极管。本工作探索的结果构成了电子束照射对 BaWO 纳米粒子的结构、光吸收和光致发光特性的剂量依赖性影响的第一份报告。