Persistent luminescence, TL and OSL characterization of beta irradiated SrAl<inf>2</inf>O<inf>4</inf>:Eu<sup>2+</sup>, Dy<sup>3+</sup>combustion synthesized phosphor

N. J. Zúñiga-Rivera, R. García, R. Rodríguez-Mijangos, V. Chernov, R. Meléndrez, M. Pedroza-Montero, M. Barboza-Flores

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

14 Citas (Scopus)

Resumen

The persistent luminescence (PLUM), thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of strontium aluminates co-doped with Eu+2and Dy+3exposed to beta radiation is reported. The phosphor was synthesized by the combustion synthesis method employing a highly exothermic redox reaction between the metal nitrates [Al(NO3)3, Sr(NO3)2, Eu(NO3)3and Dy(NO3)3] and organic fuel carbohydrazide (CH6N4O). The long decay PLUM emission, TL and OSL were measured as a function of beta radiation dose. A wide emission band centered at 510 nm (green) related to Eu2+ions and lattice defects were observed for the synthesized samples. The presence of a variety of defects and aggregates were responsible for the observed broad 100 °C peaked TL glow curve of the irradiated sample which is composed of several overlapped TL peaks. The existence of multiple trapping levels, with different trapping/detrapping probabilities, is behind the particular features for the PLUM, TL and OSL emissions. We conclude that in the SrAl2O4:Eu2+, Dy3+phosphors, the low temperature TL peaked around 30-75°C is responsible for the PLUM emission and those around 100°C were related to very stable trapping states which provide suitable radiation storage properties to be used as a PLUM/TL/OSL radiation phosphor. © 2014 Elsevier B.V. All rights reserved.
Idioma originalInglés estadounidense
Páginas (desde-hasta)99-102
Número de páginas4
PublicaciónNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
DOI
EstadoPublicada - 1 may 2014

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