Preparation of cerium doped calcium pyrophosphate: Study of luminescent behavior

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• 作者：I.B. Lozano^a ; ^{ivonne.berenice@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; J. Roman-Lopez^b ; R. Sosa^c ; J.A.I Dí ; az-Gó ; ngora^a ; J. Azorí ; n^c
• 关键词：Thermoluminescence ; Photoluminescence ; Ca2P2O7 ; Ce3+
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：173
• 期：Complete
• 页码：5-10
• 全文大小：1523 K

文摘

Thermoluminescent (TL) and photoluminescent (PL) band emissions of cerium doped calcium pyrophosphate (Ca₂O₇P₂:Ce³⁺) were studied. Wet precipitation method was used to synthesize calcium pyrophosphate, doped with Ce³⁺ (1.0 at%) impurities, from orthophosphoric acid and calcium acetate, as raw materials. The effect of temperature annealing at 800 and 900 °C was investigated. X-Ray diffraction (XRD) and Scanning Electron Microscope (SEM) were used to characterize both as-precipitated and annealed powders samples. The PL emission spectrum of samples annealed at 900 °C displayed characteristics 5d–4f transitions of Ce³⁺ at 333 nm and 360 nm. TL measurements were carried out on as-precipitated and annealed samples from room temperature (RT) up to 350 °C. The TL results of annealed samples showed complex TL glow curves, a linear response in the absorbed dose range of 0.5–5 Gy and a good reproducibility after 10 cycles of irradiation-readout. The complex TL glow curves of annealed samples were analyzed by the methods of T_max–T_Stop, Initial Rise (IR) and Computational Glow-Curve Deconvolution (CGCD) assuming a General Order Kinetic (GOK).