351. Consequences of doping Er3+ and Yb3+ ions on the thermoluminescence dosimetry performance of the BaO-ZnO-LiF-B2O3-Sm2O3 glass system.
- Author
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Prabhu, Nimitha S., Sharmila, K., Karunakara, N., Sayyed, M.I., Almuqrin, Aljawhara H., and Kamath, Sudha D.
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THERMOLUMINESCENCE , *THERMOLUMINESCENCE dosimetry , *GLASS , *IONS - Abstract
• First TL investigation on Sm3+-Er3+ and Sm3+-Yb3+ co-doped BaO-ZnO-LiF-B 2 O 3 glass. • Sm3+-Er3+ and Sm3+-Yb3+ are activator-quencher combinations for TL intensity. • Anomalous loss of signal of Sm3+ doped glass countered by doping Er3+ and Yb3+. • TL dosimetry performance can be tuned by the doping/co-doping of rare-earth ions. The consequences of doping Er3+ and Yb3+ ions on the thermoluminescence (TL) dosimetry performance of the BaO-ZnO-LiF-B 2 O 3 -Sm 2 O 3 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. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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