Thermo luminescence and optically stimulated luminescence characteristics of Al2O3 doped with Tb

Thermo luminescence and optically stimulated luminescence characteristics of Al2O3 doped with Tb

Autor Soares, J. V. Google Scholar
Gugliotti, C. F. Google Scholar
Kawashima, Y. S. Google Scholar
Tatumi, Sonia Hatsue Autor UNIFESP Google Scholar
Mittani, Juan Carlos Ramirez Autor UNIFESP Google Scholar
Instituição Technol Fac São Paulo
Universidade Federal de São Paulo (UNIFESP)
Resumo In the present work policrystals of alpha - Al2O3 doped with terbium were synthesized using the solvent evaporation method. the samples were prepared using Al(NO3)(3)center dot 9H(2)O and Tb(NO3)(3).5H(2)O reagents, with Tb concentrations between 1 and 5 mol% and thermally treated at high temperature above similar to 1400 degrees C. X-ray diffraction measurements showed the a-phase formation of samples. TL glow curve presented an intense peak at similar to 190 degrees C and two other with low intensity at 290 and 350 degrees C after gamma irradiation. the best doping concentration which presented high luminescence was the sample doped with 3 mol% of Tb. U 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 degrees C peak as well as in OSL signal, this last carried out using 532 nm wavelength stimulation. (C) 2014 Elsevier B.V. All rights reserved.
Assunto Al2O3
Thermoluminescence
Optically stimulated luminescence
TL spectra
Fluorescence
Idioma Inglês
Data 2014-12-01
Publicado em Radiation Measurements. Oxford: Pergamon-Elsevier B.V., v. 71, p. 78-80, 2014.
ISSN 1350-4487 (Sherpa/Romeo, fator de impacto)
Editor Elsevier B.V.
Extensão 78-80
Fonte http://dx.doi.org/10.1016/j.radmeas.2014.05.015
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000347494400017
URI http://repositorio.unifesp.br/handle/11600/38520

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