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

C Boronat; V Correcher; J C Bravo-Yagüe; I Sarasola-Martin; J Garcia-Guinea; J F Benavente

doi:10.1016/j.saa.2023.122571

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

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jul 5:295:122571. doi: 10.1016/j.saa.2023.122571. Epub 2023 Mar 3.

Authors

C Boronat¹, V Correcher², J C Bravo-Yagüe³, I Sarasola-Martin², J Garcia-Guinea⁴, J F Benavente²

Affiliations

¹ UNED, Av. de Esparta s/n, 28232 Madrid, Spain; CIEMAT, Av. Complutense 40, 28040 Madrid, Spain. Electronic address: cboronat9@alumno.uned.es.
² CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.
³ UNED, Av. de Esparta s/n, 28232 Madrid, Spain.
⁴ MNCN-CSIC, J. Gutierrez Abascal 2, 28006 Madrid, Spain.

PMID: 36906933
DOI: 10.1016/j.saa.2023.122571

Abstract

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.

Keywords: CaF(2); Dosimeters; Kinetics Analysis; LiF; Luminescence; Ultraviolet.