Kinetic Parameters analysis of GdAlO$_3$ based on thermoluminescent phenomenon

TL;DR

This study analyzes the thermoluminescent kinetic parameters of GdAlO3 phosphors, revealing complex glow curves with multiple components and distinguishing trap systems using various computational methods.

Contribution

It introduces a comprehensive analysis of TL kinetic parameters in GdAlO3, identifying the most suitable deconvolution method (CGCD) for complex glow curves.

Findings

Complex glow curves with multiple peaks at 100, 140, 240, and 290°C.

Coexistence of continuum and discrete trap systems in GdAlO3.

CGCD method effectively deconvolutes TL glow curves based on first-order kinetics.

Abstract

{We herein report on the calculation of thermoluminescence (TL) kinetic parameters determined from the TL emission of synthetic GdAlO3 (GAO) phosphors prepared by the co-precipitation method. The sample, characterized by means of X-ray diffraction with an orthorhombic phase structure (space group Pnma (62), shows complex glow curves consisting of at least four groups of components peaked at 100, 140, 240, and 290 {\deg}C where the two lower overlapped temperature peaks are difficult to identify using the $T_M-T_{stop}$. The coexistence of a continuum in the trap distribution (linked to the lower temperature peaks) and a discrete trap system (associated with the components at temperatures higher than 200 {\deg}C) can be distinguished. The estimation of the TL kinetic parameters is performed using GlowFit, TLAnal, the spreadsheet Origin, Computing Glow Curve Deconvolution (CGCD), and various heating rate (VHR) methods. However, only CGCD appears as the suitable technique for such purpose since it provides information on the TL physical process supported by mathematical models based on a linear combination of functions related to the First Order Kinetic approach.