Kaynar Ü.H.Guvener E.Ayvacikli M.Dogan T.Balci-Yegen S.Oglakci M.Topaksu M.Karabulut Y.Canimoglu A.Benourdja S.Can N.2024-07-222024-07-22201809258388http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/14774The stuffed derivative of the tridymite structure, the oxide BaAl2O4 has been regarded as a long persistent phosphor. Thermoluminescence (TL) glow curve peaks of thin pellet samples of undoped and, Sm3+ and Tb3+ doped BaAl2O4 prepared by combustion method was reported. The structure of the compounds was monitored by X-ray diffraction and found a single-phase compound with a hexagonal structure. Performing a series of TL measurements for the temperature range from room temperature to 400 °C, the effect of beta radiation dose on TL response, various TL heating rate (HR) properties of undoped and Sm3+ and Tb3+ doped BaAl2O4 phosphors were investigated. Peak shape method was also utilized to assess the trap parameters. The activation energy of the main peak at 128 °C was found to be 0.97 eV. TL glow curves obtained from undoped and Tb3+ doped BaAl2O4 decrease with increasing HR value (varying from 0.5 to 15 °C s−1) in a way matching with thermal quenching effect. Contrary to expectations, anomalous HR dependence was observed on Sm3+ doped BaAl2O4 sample and a semi-localized transition model has been used in order to explain such behaviour. © 2018 Elsevier B.V.EnglishActivation energyAluminum compoundsElectron transitionsHeating ratePhosphorsRare earthsSamarium compoundsSilicaSilicate mineralsTerbium compoundsThermoluminescenceAnomalous heatingBaAl2O4Hexagonal structuresLong persistent phosphorPeak shape methodsSemi-localized transitionsSingle-phase compoundTemperature rangeBarium compoundsArticle10.1016/j.jallcom.2018.06.125