Analysis of TL and OSL kinetics of lithium aluminate

• Published in: Radiation measurements Vol. 71; pp. 143 - 147
• Main Authors: Twardak, A., Bilski, P., Marczewska, B., Gieszczyk, W.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01-12-2014; Elsevier
• Subjects: Aluminates; Composite structures; Decay rate; Deconvolution; Earth sciences; Earth, ocean, space; Exact sciences and technology; Geochronology; Heating rate; Isotope geochemistry. Geochronology; Kinetics; LiAlO2; Lithium; Lithium aluminate; Optically stimulated luminescence; Radiation measurement; Thermoluminescence; Poland, Malopolskie, Krakow; Optically stimulated luminescence; Kinetics; LiAlO2; Lithium aluminate; Thermoluminescence; deconvolution; lithium; polycrystalline materials; LiAlO; OSL; thermoluminescence; kinetics
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2014.03.012

Lithium aluminate (LiAlO2) polycrystalline material showing high OSL sensitivity and linear dose response was prepared at IFJ Krakow. The kinetic parameters of OSL and TL processes were evaluated using various experimental techniques: LM-OSL deconvolution, TL glow-curve deconvolution, variable heating rate and isothermal decay. The OSL signal was found to consist of four components, one of them exhibiting a very slow decay. The TL glow-curve possesses two apparent peaks at approximately 85 °C and at 165 °C, which both seem to follow first order kinetics. These peaks seem to have a composite structure and as many as six peaks were found in the glow-curve.
•LiAlO2 components' photoionization cross sections for blue light was calculated.•Estimation of LiAlO2 TL trap parameters using deconvolution.•Calculation of LiAlO2 TL trap parameters using various heating rates.•Estimation of LiAlO2 TL activation energy using isothermal decay measurements.