Understanding thermoluminescence kinetics in BaWO4 phosphors by glow curve analysis methods

Thermoluminescence (TL) phenomenon is extensively used in dose measurements of ionizing radiations. Lanthanide doped tungstates are suitable dosimeters for application in thermoluminescence dosimetry. In order to understand the TL mechanism, the information of various kinetic parameters of a dosimet...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2022-09, Vol.33 (26), p.20953-20961
Main Authors: Ambast, A. K., Sharma, S. K.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dosimeters
Dosimetry
Gamma irradiation
Glow curves
Heating rate
Hole traps
Kinetics
Materials Science
Mathematical analysis
Optical and Electronic Materials
Parameters
Phosphors
Radiation
Radiation dosage
Raw materials
Spectrum analysis
Thermoluminescence
Tungstates
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Summary:Thermoluminescence (TL) phenomenon is extensively used in dose measurements of ionizing radiations. Lanthanide doped tungstates are suitable dosimeters for application in thermoluminescence dosimetry. In order to understand the TL mechanism, the information of various kinetic parameters of a dosimeter is always required. In this work, we studied the spectroscopy of traps in undoped, Dy 3+ doped and Sr 2+ co-doped BaWO 4 phosphors by TL methods. The thermoluminescence glow curves were recorded after the γ-ray irradiation in dose range 1–5 kGy at heating rate 5 °C/s. The glow curves of undoped phosphor exhibit two peaks at around 117 °C and 225 °C whereas Dy 3+ -doped and Sr 2+ -co-doped phosphors show a single prominent peak at 121 °C and 119 °C respectively along with a shoulder. The glow curves are recorded by variation of heating rates from 2 to 6 °C/s. The electron and hole traps are formed due to γ-irradiation and are identified by applying various glow curve analysis techniques. The glow curves of all the three phosphors are composite in nature. These composite glow peaks were first deconvoluted by TLanal computer program and the kinetic parameters in which trap depth ( E ) and frequency factor ( s ) were calculated by computerized glow curve deconvolution, Chen’s peak shape and different heating rate methods.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-022-08901-7