Comparing the effect of electron beam, beta and ultraviolet C exposure on the luminescence emission of commercial dosimeters.

Autor: Boronat C; UNED, Av. de Esparta s/n, 28232 Madrid, Spain; CIEMAT, Av. Complutense 40, 28040 Madrid, Spain. Electronic address: cboronat9@alumno.uned.es., Correcher V; CIEMAT, Av. Complutense 40, 28040 Madrid, Spain., Bravo-Yagüe JC; UNED, Av. de Esparta s/n, 28232 Madrid, Spain., Sarasola-Martin I; CIEMAT, Av. Complutense 40, 28040 Madrid, Spain., Garcia-Guinea J; MNCN-CSIC, J. Gutierrez Abascal 2, 28006 Madrid, Spain., Benavente JF; CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2023 Jul 05; Vol. 295, pp. 122571. Date of Electronic Publication: 2023 Mar 03.
DOI: 10.1016/j.saa.2023.122571
Abstrakt: This paper reports on the luminescence characterization of TLD-100 (LiF: Ti, Mg), TLD-200 (CaF 2 : Dy), TLD-400 (CaF 2 : 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 F 3 + centres or the presence of hydroxyl groups and (iii) the red-infrared emission band associated with F 2 centres. However, CL spectra from the CaF 2 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 Dy 3+ ), whilst TLD-400 exhibits a broad maximum peaked at ̴500 nm (linked to the Mn 2+ ). 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.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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