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Luminescence characteristics of O6+ ion beam and γ-ray irradiated Ca9La(PO4)5(SiO4)F2:Eu phosphor
Radiation Effects and Defects in Solids ( IF 1 ) Pub Date : 2020-03-20 , DOI: 10.1080/10420150.2020.1737696
Chaitali M. Mehare 1, 2 , V. Chopra 3 , Chandan Ghanty 2 , N. S. Dhoble 4 , S. J. Dhoble 1
Affiliation  

ABSTRACT Fluorapatite Ca9La(PO4)5(SiO4)F2: Eu with variable molar concentrations of Eu3+ (0.05–1.0 mol%) were synthesised by the solid-state reaction method and their photoluminescence (PL), thermoluminescence (TL) characteristics were studied after irradiating the samples with γ-rays and 75 MeV O6+ ion beam. The formation of the material was confirmed using X-ray diffraction pattern followed by Scanning electron microscopy and Fourier transform infra-red (FTIR) spectrum. The morphology of the synthesised powder was observed to be polycrystalline constituted by microcrystalline particles. FTIR spectrum shows characteristic bands, 563 cm−1 for bending vibration υ4 and 1035 cm−1 for stretching vibration υ3. PL spectra show absorption bands at 395 and 466 nm corresponding to 7F0→5L6 and 7F0→5D2 transitions and the emission band was seen at around 595 and 616 nm describing 5D0→7Fj transitions (j = 1,2). Furthermore, TL glow curves of both γ-rays and 75 MeV O6+ ion beam irradiated samples show a prominent peak at around 145°C with a small hump at around 245°C. The concentration 0.2 and 1 mol% was found to be the best concentration for studying TL properties of Ca9La(PO4)5(SiO4)F2: Eu irradiated with γ-rays and 75 MeV O6+ ion-beam respectively.

中文翻译:

O6+离子束和γ射线辐照Ca9La(PO4)5(SiO4)F2:Eu荧光粉的发光特性

摘要 氟磷灰石 Ca9La(PO4)5(SiO4)F2:通过固态反应法合成了具有可变摩尔浓度 Eu3+ (0.05–1.0 mol%) 的 Eu,并研究了它们的光致发光 (PL)、热致发光 (TL) 特性。用 γ 射线和 75 MeV O6+ 离子束照射样品。使用 X 射线衍射图、随后的扫描电子显微镜和傅里叶变换红外 (FTIR) 光谱确认了材料的形成。观察到合成粉末的形态是由微晶颗粒构成的多晶。FTIR 光谱显示特征带,弯曲振动 υ4 为 563 cm-1,伸缩振动 υ3 为 1035 cm-1。PL 光谱显示 395 和 466 nm 处的吸收带对应于 7F0→5L6 和 7F0→5D2 跃迁,发射带出现在 595 和 616 nm 附近,描述了 5D0→7Fj 跃迁(j = 1,2)。此外,γ 射线和 75 MeV O6+ 离子束照射样品的 TL 辉光曲线在 145°C 附近显示出一个突出的峰,在 245°C 附近有一个小峰。发现浓度 0.2 和 1 mol% 是研究 Ca9La(PO4)5(SiO4)F2:Eu 分别用 γ 射线和 75 MeV O6+ 离子束照射的 TL 特性的最佳浓度。
更新日期:2020-03-20
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