LiAlO2 with nanocrystals of Al2Tb4O9 / Tb(AlO3) synthesized by sol-gel technique for TL and OSL applications

Autor(es)

Ventieri, Alexandre ; Mittani, Juan C. R. ; Rocca, Rene R. ; Goncalves, Katia A. ; Tatumi, Sonia H.

• Tipo de documento: Artigo Científico
• Fonte: Radiation Measurements; v. 106, p. 5-pg., 2017-11-01.

Resumo

Using a sol-gel route, powder samples of gamma-LiAklO(2) and doped with Tb were synthesized successfully. Xray diffraction (XRD) results demonstrated that doped samples were composed of two phases Al2Tb4O9 and Tb(AlO3), which form long nanostructure crystals reveled by SEM images on the surface of gamma-LiAlO2 grains. The undoped and doped samples supplied intense and complex TL glow curves, which were studied by Tm-Tstop method. A minimum detection dose (MDD) of 2.2 mGy was obtained with the 210 degrees C TL peak of gamma-LiAlO2:Tb. OSL results of gamma-LiAlO2:Tb showed strong thermal and optical charges transfer behavior. The OSL response of gamma-LiAlO2:Tb could be sensitized by high dose irradiation and supplied a MDD of 5 mGy. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/07325-0 - SSD 18 - 18th International Conference on Solid State Dosimetry
• Beneficiário: Sonia Hatsue Tatumi
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior