Thermoluminescence property of LiMgF3 erbium activated phosphor

I C Muñoz; E Cruz-Zaragoza; A Favalli; C Furetta

doi:10.1016/j.apradiso.2012.02.006

Thermoluminescence property of LiMgF3 erbium activated phosphor

Appl Radiat Isot. 2012 May;70(5):893-6. doi: 10.1016/j.apradiso.2012.02.006. Epub 2012 Feb 21.

Authors

I C Muñoz¹, E Cruz-Zaragoza, A Favalli, C Furetta

Affiliation

¹ Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Mexico.

PMID: 22381701
DOI: 10.1016/j.apradiso.2012.02.006

Abstract

The perovskite-like LiMgF(3):ErF(3) pellets were obtained from the melt formed by LiF and MgF(2) mixed salts in the stoichiometric ratio. The perovskite material was doped with 1, 2 and 4 mol% of ErF(3) impurity. The pellets samples were (60)Co gamma irradiated and their thermoluminescence (TL) properties were analyzed, i.e., dose-response, fading at RT and under UV irradiation, TL signal reproducibility, and kinetic parameters. The intensity of the TL response against irradiation dose was increased remarkably by the high concentration of impurity, and a linear dose-response was observed in the range of 1-10 Gy. The fading observed at RT was about 10-30% after 24h from irradiation. All samples were exposed from 1 to 200 Gy gamma dose range. The TL glow peaks were found around 367-376, 438-447, 509-521, and 594-611 K, when the doped samples were 1, 2 and 4 mol% of the erbium impurity concentration. The thermoluminescence kinetics parameters of the glow curves have been analyzed using the Computerized Glow Curve Deconvolution (CGCD) method.