Thermoluminescence and optically stimulated luminescence characteristics of Al2O3 doped with Tb |
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| Institution: | 1. Technological Faculty of São Paulo, Praça Cel. Fernando Prestes, 30, São Paulo-SP, Brazil;2. Federal University of São Paulo, Baixada Santista, Av. Almirante Saldanha da Gama, 89, Santos, Brazil;1. 306-A, Neelkanthgardens, Mumbai 400088, India;2. Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong, Daejeon, Republic of Korea;1. Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;2. Tokuyama Corp, 1-1 Mikage-cho, Shunan-shi, Yamaguchi 745-8648, Japan;3. Kyusyu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan;4. Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Nuclear Research Center Negev, Beersheva, Israel;2. Ben Gurion University of the Negev, Beersheva, Israel;3. Soreq Nuclear Research Center, Yavne 81800, Israel;4. Sami Shamoon College of Engineering, Beersheva 84100, Israel;1. Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Cardiff University, Cardiff CF24 4HQ, UK;2. Biomedicine Division, School of Biosciences, Cardiff University, Cardiff CF10 3AX, UK;1. Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland;2. Jan Dlugosz University, Czestochowa, Poland;1. Laboratório de Qumica do Estado Sólido, Departamento de Qumica Fundamental – CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil;2. Programa de Pós-graduacão em Ciência de Materiais – PPGMTR, CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil |
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| Abstract: | In the present work policrystals of α − Al2O3 doped with terbium were synthesized using the solvent evaporation method. The samples were prepared using Al(NO3)3·9H2O and Tb(NO3)3·5H2O reagents, with Tb concentrations between 1 and 5 mol% and thermally treated at high temperature above ∼1400 °C. X-ray diffraction measurements showed the α-phase formation of samples. TL glow curve presented an intense peak at ∼190 °C and two other with low intensity at 290 and 350 °C after gamma irradiation. The best doping concentration which presented high luminescence was the sample doped with 3 mol% of Tb. TL spectra and fluorescence measurements showed similar luminescence spectra with lines attribute to Tb3+ ions. A linear behavior to gamma dose between 1 and 20 Gy was observed in TL, using 190 °C peak as well as in OSL signal, this last carried out using 532 nm wavelength stimulation. |
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| Keywords: | Thermoluminescence Optically stimulated luminescence TL spectra Fluorescence |
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