Roman-Lopez J, Lozano I B, Cruz-Zaragoza E, Castañeda J I Guzman, Díaz-Góngora J A I
CONACYT - Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543, 04510 Ciudad de México, Mexico.
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaria, 11500 Ciudad de México, Mexico.
Appl Radiat Isot. 2017 Jun;124:44-48. doi: 10.1016/j.apradiso.2017.03.004. Epub 2017 Mar 6.
In this work, luminescent emissions of beta-calcium pyrophosphate doped with terbium ions (β-CaPO:Tb) were studied. The CaPO:Tb 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 with D (D)→F transitions of Tb 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-CaPO:Tb samples exposed to Co 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.
