Title: Influence of carbon doping on the thermoluminescence properties of LaAlO3 crystal grown by solid state reaction method

Authors: Abdelkader Azaiz; Ahmed Kadari; Neriene Alves; Luiz O. Faria

Addresses: Faculté des Sciences de la Matière, Département de Physique, Laboraoire de Synthèse et de Catalyse, Université Ibn Khaldoun Tiaret, BP P 78 Zaaroura, Tiaret, Algérie ' Faculté des Sciences de la Matière, Département de Chimie, Université Ibn Khaldoun Tiaret, BP P 78 Zaaroura, Tiaret, Algérie ' Depto. de Engenharia Nuclear (DEN/UFMG-MG), Av. Antônio Carlos 6627, 31270-970 Belo Horizonte, MG, Brazil ' Centro de Desenvolvimento da Tecnologia Nuclear, Av. Antonio Carlos 6627, C.P.941, 30161-970 Belo Horizonte, MG, Brazil

Abstract: In this paper, we report a modelling investigation of the thermoluminescence mechanisms for the important dosimetric LaAlO3:C crystals, which were grown by solid state reaction method. The aim of this work is to develop for the first time an algorithm that permits the numerical solution of the relevant sets of differential equations governing the different stages of the experimental procedure. The glow curve measured at 10K/s typically consists of three prominent peaks at 417 K, 494 K and 549 K and a minor glow peak at around 372 K. In this work, we show that this TL output behaviour can rather easily be explained within the framework of the 4T1R model. Good agreement between the experimental data and calculations from the model is obtained for this kind of dosimetric material. Results presented here confirm that the LaAlO3:C system an excellent candidate that can be used as a TL dosimeter in UV fields.

Keywords: lanthanum aluminate; carbon doping; kinetic parameters; thermoluminescence model; ultraviolet dosimeter.

DOI: 10.1504/IJMMP.2020.106925

International Journal of Microstructure and Materials Properties, 2020 Vol.15 No.2, pp.156 - 167

Received: 09 Jul 2019
Accepted: 15 Dec 2019

Published online: 27 Apr 2020 *

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