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Título : | Comparing the effect of electron beam, beta and ultraviolet C exposure on the luminescence emission of commercial dosimeters |
Autor : | Boronat Castaño, Cecilia Correcher Delgado, Virgilio Bravo Yagüe, Juan Carlos Sarasola Martín, Iciar García Guinea, Javier Benavente Cuevas, José Francisco |
Palabras clave : | CaF2 Dosimeters Kinetics Analysis LiF Luminescence Ultraviolet |
Fecha de publicación : | jul-2023 |
Editorial : | Elsevier |
Citación : | Boronat, C., Correcher, V., Bravo-Yagüe, J. C., Sarasola-Martin, I., Garcia-Guinea, J., Benavente, J.F. Comparing the effect of electron beam, beta and ultraviolet C exposure on the luminescence emission of commercial dosimeters. Spectrochim. Acta A. 295, 122571. (2023) |
Resumen : | This paper reports on the luminescence characterization of TLD-100 (LiF: Ti, Mg), TLD-200 (CaF2: Dy), TLD-400 (CaF2: Mn) and GR-200 (LiF: Mg, Cu, P) dosimeters exposed to electro beam, beta and ultraviolet C radiation -UVC-. All of them show high sensitivity to radiation regardless of whether it is ionizing or partially ionizing radiation based on their luminescence properties (cathodoluminescence -CL- or thermoluminescence -TL-). CL emission differs significantly among them in shape and intensity due to their chemical compositions. LiF samples display three maxima at: (i) 300–450 nm linked to intrinsic and structural defects, (ii) a green waveband probably due to F3 + centres or the presence of hydroxyl groups and (iii) the red-infrared emission band associated with F2 centres. However, CL spectra from the CaF2 dosimeters display meaningful differences due to the dopant. TLD-200 is characterized by an emission with four sharp individual peaks in the green-IR spectral region (due to the Dy3+), whilst TLD-400 exhibits a broad maximum peaked at ̴500 nm (linked to the Mn2+). On the other hand, the variation in the TL glow curves allows to discriminate the TLDs exposed to beta and UVC radiation since they give rise to different chemical-physical processes and that have been studied from the estimation of the kinetic parameters by means of the Computerised Glow Curve Deconvolution (CGCD) method. |
Descripción : | https://doi.org/10.1016/j.saa.2023.122571 |
URI : | http://documenta.ciemat.es/handle/123456789/3807 |
ISSN : | 13861425 |
Aparece en las colecciones: | Artículos de Medio Ambiente
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