Determination of kinetics parameters of the main glow peaks for KMgF3:Lu and LiF:Mg phosphors after long-term high temperature storage

P R González; C Furetta; J Marcazzó; E Cruz-Zaragoza; L Pérez Cruz

doi:10.1016/j.apradiso.2013.04.033

Determination of kinetics parameters of the main glow peaks for KMgF3:Lu and LiF:Mg phosphors after long-term high temperature storage

Appl Radiat Isot. 2013 Sep:79:67-72. doi: 10.1016/j.apradiso.2013.04.033. Epub 2013 May 9.

Authors

P R González¹, C Furetta, J Marcazzó, E Cruz-Zaragoza, L Pérez Cruz

Affiliation

¹ Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca s/n, C.P. 52750, Ocoyoacac, Estado de México, México. prgonzalezmx@yahoo.com

PMID: 23728351
DOI: 10.1016/j.apradiso.2013.04.033

Abstract

The isothermal decay method is useful for determining the trap activation energy in thermoluminescent material for dosimetry purposes. Recently we proposed new modified expressions for isothermal decay method. As validation of the modified expressions, after long-term (4 h) high temperature storage, the activation energy of experimental TL glow peaks, KMgF3:Lu (0.17 and 0.34 mol%) and LiF:Mg (0.04 mol%), in the framework of the general-order kinetic was calculated. The results of the kinetics parameters were compared with those obtained by the other methods like Initial Rise (IR), Sequential Quadratic Programming Glow Curve Deconvolution (SQPGCD), deconvolution of the TL glow curves by assuming the General Order Kinetic (GOK), and Chen General-Order Kinetics method. It seems that both SQPGCD and GOK deconvolution methods give more accurate kinetics parameters values for the experimental glow curves.

Keywords: Activation energy; Dosimetry; Isothermal decay; Solid state detectors; Thermoluminescence.