Synthesis and thermoluminescence/optically stimulated luminescence properties of CaB4O7:Ce phosphor

Palan, C. B.; Koparkar, K. A.; Bajaj, N. S.; Soni, Anuj; Omanwar, S. K.

doi:10.1007/s10854-016-4465-x

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…BaB4O7 doped with Ce has a TL sensitivity approximately 1.8 times higher than that of TLD-100 (LiF:Mg,Ti) and a linear response over a dose range of 1.5 mGy to 1.3 kGy, with a fading of 5% after 30 days [27]. CaB4O7, although having a high Zeff of 12.5, shows a sensitivity 8 times higher than that of TLD-100 when doped with Dy [28,29,32,33].…”

Section: Introductionmentioning

confidence: 99%

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Oliveira¹,

Souza²,

Donald³

et al. 2022

Braz. J. Rad. Sci.

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Thermoluminescent (TLD) and optically stimulated luminescent dosimeters (OSLD) are essential in radiation dosimetry. Such dosimeters can be easily transported due to their small size and can be used in in vivo dosimetry and anthropomorphic simulations. In this work, the dosimetric properties of Li2B4O7 and MgB4O7 compounds were evaluated based on their response to the applied stimulus, whether thermal or optical. The linear dose response range of the luminescent signal, its fading, the lowest detectable dose, and reproducibility are important parameters in determining a good dosimeter for clinical and personal dosimetry. Therefore, the objective of this work was, based on studies performed by other authors on dosimetric characterizations of doped a codoped Li2B4O7 and MgB4O7, to point out those compounds with the greatest potential for applications in personal and clinical dosimetry using TL and OSL techniques. Considering the results described in other works, the materials that stood out for use in personal and clinical dosimetry were Li2B4O7:Cu and MgB4O7:Dy,Na. In several of the reported studies, no data related to LDD, fading and reproducibility of the luminescent signal of the investigated compounds were found. Therefore, there are many possibilities for investigations into these two types of compounds for the purpose of their use in personal and clinical dosimetry. Further studies will provide a broader scientific basis for choosing appropriate dosimetric materials for these applications.

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Section: Introductionmentioning

confidence: 99%

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Oliveira¹,

Souza²,

Donald³

et al. 2022

Braz. J. Rad. Sci.

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“…[23][24][25] Among these materials, calcium borates are suitable for the dosimetric application because the effective atomic numbers (Z eff ) of calcium borates (e.g. CaB 4 O 7 , 12.5 26) and CaB 2 O 4 , 14.1 27) ) are close to that of human hard tissue (Z eff = 13.8 28) ). Moreover, the ionic radius of Ca 2+ (1.00 Å at the six-coordination site 29) ) is close to those of rare-earth ions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence properties of Ca₂B₂O₅:Dy ceramics for neutron measurement

Komiya¹,

Kawamura²,

Kawamoto³

et al. 2022

Jpn. J. Appl. Phys.

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To develop thermoluminescent materials for neutron detection, 10B-enriched and 11B-enriched Ca2B2O5:Dy were prepared and their thermoluminescence (TL) properties were investigated after irradiation with X-rays, He ions and thermal neutrons. The TL of these materials was induced by X-rays and He ions and sensitivities to radiation are independent of the boron isotopes in the host materials. On the contrary, the TL intensity of the 10B-enriched sample was significantly higher than that of the 11B-enriched sample after irradiation with thermal neutrons. The high sensitivity to neutrons in the TL of the 10B-enriched sample is attributed to γ-rays and charged particles generated from 10B(n, α)7Li and 10B(n, α)7Li* reactions. In the neutron fluence range of the measurements (3.0 × 105 to 108 neutrons cm−2), the TL intensities attributed to 10B(n, α)7Li and 10B(n, α)7Li* reactions against thermal neutron fluence showed good linearity. In terms of detectable fluence, the new TL materials are more sensitive to neutrons than some existing Dy-containing TL materials.

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“…Among the boron-containing compounds, the TL and OSL properties of calcium borate compounds have been reported, e.g. CaB 4 O 7 :Cu ceramics (0.43-17.5 Gy linearity for X-rays), 21) CaB 4 O 7 :Mn ceramics (33 mGy-60 Gy linearity for β-rays), 22) and Dy-doped 70B 2 O 3 -30CaO glasses (0.5-4.0 Gy linearity for X-rays) 23) in TL dosimeters, as well as CaB 4 O 7 :Ce (0.1-24 Gy linearity for β-rays) 24) in OSL dosimeters. Recently, we reported the TL and OSL properties of Ce 3+ -doped CaB 2 O 4 , 25) which displayed a dynamic range of 1-1000 mGy for TL and 1-10 000 mGy for OSL.…”

Section: Introductionmentioning

confidence: 99%

Neutron-induced thermoluminescence properties of Tb³⁺-doped Ca₂B₂O₅ceramics

Komiya¹,

Kawamura²,

Kawamoto³

et al. 2021

Jpn. J. Appl. Phys.

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We fabricated 10 B-enriched ( 10 B ceramics) and 11 B-enriched ( 11 B ceramics) Ca 2 B 2 O 5 :Tb ceramics as thermoluminescence (TL) materials for neutron detection applications. The TL properties of the ceramics after X-ray irradiation, particle beam irradiation, and neutron irradiation were investigated. The TL properties of the 10 B ceramics and 11 B ceramics after X-ray irradiation were similar, whereas the neutron-induced TL intensity of the 10 B ceramics was significantly higher than that of the 11 B ceramics. The different TL properties of these ceramics are due to the α-rays, Li ions, and γ-rays generated during the 10 B(n, α) 7 Li reaction. The lower limit of neutron detection by the ceramics was less than 2 × 10 7 neutrons cm −2 , which was lower than those of several previously reported TL materials. Therefore, these ceramics can be applied as TL dosimetry materials for neutron detection.

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Synthesis and thermoluminescence/optically stimulated luminescence properties of CaB4O7:Ce phosphor

Cited by 12 publications

References 28 publications

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Thermoluminescence properties of Ca₂B₂O₅:Dy ceramics for neutron measurement

Neutron-induced thermoluminescence properties of Tb³⁺-doped Ca₂B₂O₅ceramics

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Synthesis and thermoluminescence/optically stimulated luminescence properties of CaB4O7:Ce phosphor

Cited by 12 publications

References 28 publications

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Challenges in personal and clinical dosimetry using Li2B4O7 and MgB4O7 as TLD and OSLD

Thermoluminescence properties of Ca2B2O5:Dy ceramics for neutron measurement

Neutron-induced thermoluminescence properties of Tb3+-doped Ca2B2O5ceramics

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Thermoluminescence properties of Ca₂B₂O₅:Dy ceramics for neutron measurement

Neutron-induced thermoluminescence properties of Tb³⁺-doped Ca₂B₂O₅ceramics