Synthesis of β-Ca2P2O7:Tb3+to gamma radiation detection by thermoluminescence.
In this work, luminescent emissions of beta-calcium pyrophosphate doped with terbium ions (β-Ca2P2O7:Tb3+) were studied. The Ca2P2O7:Tb3+powders were prepared by precipitation and annealed at 900°C for 2h was applied on the powders to observe the beta phase. Radioluminescence measurements showed emission bands related with5D3(5D4)→7FJtransitions of Tb3+ions. Three overlapped peaks at 126, 165 and 220°C were observed in thermoluminescence response. A linear TL dose-response in the range of 0.2-10Gy and an acceptable TL reproducibility were showed by the β-Ca2P2O7:Tb3+samples exposed to60Co gamma radiation. The TL glow curves were analyzed by Initial Rise method and Computational Glow-Curve Deconvolution assuming a General Order Kinetic model to evaluate the kinetic parameters related with the TL peaks.
CONACYT - Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543, 04510 Ciudad de México, Mexico. Electronic address: jesus.roman@nucleares.unam.mx.
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Roman-Lopez
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaria, 11500 Ciudad de México, Mexico.
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Lozano
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543, 04510 Ciudad de México, Mexico.
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Cruz-Zaragoza
Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, Edificio 6, Unidad Profesional Adolfo López Mateos, 07738 Ciudad de México, Mexico.
J I Guzman
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Castañeda
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaria, 11500 Ciudad de México, Mexico.
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JAI
Díaz-Góngora
(60)Co gamma radiation; Calcium pyrophosphate; Radioluminescence; Thermoluminescence