Sol-gel synthesis of strontium aluminate phosphor and its TL and OSL properties

Author(s)

Tatumi, Sonia H. ^[1] ; Soares, Alvaro de F. ^[1] ; Tudela, Diego R. G. ^[2] ; Goncalves, Katia A. ^[3] ; Rocca, Rene R. ^[1]

Affiliation

^[1] Univ Fed Sao Paulo, Marine Sci Dept, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Elect Engn Dept, Sao Paulo - Brazil

^[3] Anhembi Morumbi Univ, Civil Engn Dept, Sao Paulo - Brazil

• Document type: Journal article
• Source: Radiation Physics and Chemistry; v. 157, p. 15-21, APR 2019.
• Web of Science Citations: 1

Abstract

SrAl2O4 monoclinic and Sr12Al14O33 cubic phase nanocrystals were synthesized using sol-gel route and their morphology verified with X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) to confirm the crystallinity of the samples and the crystallites nanoscale. Luminescence emissions were investigated by Optically Stimulated Luminescence (OSL) and Thermoluminescence (TL) methods in samples thermally treated at 1000 degrees C for 2h and irradiated with beta particles. TL glow curve was complex with 9 individual peaks, which was analyzed by T-m-T-stop method, general order kinetic theory using Computerized Glow Curve Deconvolution (CGCD). A thermal transfer TL phenomenon was observed when the samples were pre-heated in T-m-T-stop procedure. CW-OSL decays measured at 30 degrees C have high intensities even in low doses region and curves were deconvoluted using general order kinetic theory suppling two components for low doses and three components for high dose. (AU)

• FAPESP's process: 09/02069-2 - Deployment and development of methodology for single-grain dating by optically stimulated luminescence
• Grantee: Sonia Hatsue Tatumi
• Support Opportunities: Regular Research Grants