High Charge Carrier Storage Capacity in Lithium Lutetium Silicate Doped with Cerium and Thulium

Dobrowolska, A.P.; bos, A.J.J.; Dorenbos, P.

High Charge Carrier Storage Capacity in Lithium Lutetium Silicate Doped with Cerium and Thulium

Journal article (2018)

Authors

A.P. Dobrowolska RST/Fundamental Aspects of Materials and Energy -

A.J.J. bos RST/Luminescence Materials -

P. Dorenbos RST/Luminescence Materials -

Research Group

RST/Luminescence Materials () (TU Delft)

Thermoluminescence Cerium Fading Thulium Self-irradiation Storage phosphors Traps

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http://resolver.tudelft.nl/uuid:6527d214-e773-4c6d-a779-9bf911ef49a5

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Published Date

2018

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Luminescence Materials

Abstract

It is demonstrate that LiLuSiO₄:Ce,Tm has excellent charge carrier storage properties. Comparative studies are performed with the state-of-the art X-ray storage phosphor BaFBr(I):Eu. The thermoluminescence (TL) intensity of the optimized LiLuSiO₄:Ce,Tm is four times higher than the TL of BaFBr(I):Eu. After 3 h of storage at room temperature (RT) there is still 94% of initial thermoluminescence and only 48% for BaFBr(I):Eu which demonstrates insignificant thermal fading. The signal can be read out by a blue LED and less efficiently by a red laser. It does require higher stimulation energy than in the case of BaFBr(I):Eu. The self-irradiation with a dose rate of 13 µGy h⁻¹ due to ¹⁷⁶Lu isotopes is not a serious drawback for application.

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