Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 582, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2022.121460
Keywords
Co-doping; Defects; Dosimeter; Glass; Thermoluminescence
Funding
- Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia [PNURSP2022R2]
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This study examined the effects of doping Er3+ and Yb3+ ions on the thermoluminescence dosimetry performance of the BaO-ZnO-LiF-B2O3-Sm2O3 glass system for the first time. While these ions had a negative impact on the TL intensity, sensitivity, and trap density of the Sm3+ doped glass, they effectively countered the anomalous signal loss after a week and improved the stability. This suggests that rare-earth ion doping can be used to tune the TL dosimetry performance of a glass system.
The consequences of doping Er3+ and Yb3+ ions on the thermoluminescence (TL) dosimetry performance of the BaO-ZnO-LiF-B2O3-Sm2O3 glass system were examined for the first time. The incorporation of Er3+ and Yb3+ ions were found to be highly detrimental to the TL intensity, sensitivity, and trap density of the Sm3+ doped glass. Although Sm3+ ions enhanced the integrated TL intensity of the host glass by two thousand times, Sm3+-Er3+ and Sm3+-Yb3+ combinations functioned like activator-quencher systems. Contrary, the problem of anomalous loss of 50% signal after a storage week of the Sm3+ doped glass was effectively countered by doping Er3+ (2% loss) and Yb3+ (8% loss) ions. From the trap parameters, the elimination of some shallow traps and deepening of some existing ones was reasoned for minimizing fading. Even if the Er3+ and Yb3+ ions adversely affected the TL intensity of the Sm3+ glass, they greatly improved the stability. The observations indicate that the TL dosimetry performance of a glass system can be suitably tuned by the doping/co-doping of rare-earth ions.
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