A new high sensitivity Na<sub>2</sub>LiPO<sub>4</sub>:Eu OSL phosphor

Sahare, P.D.; Singh, Manveer; Kumar, Pratik

doi:10.1039/c4ra11779d

Cited by 16 publications

(9 citation statements)

References 26 publications

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“…It can be seen from Figure 6 that for the microcrystalline particles (size range 250 µm-43 µm) the dose response is almost linear up to 1.0 kGy and start saturating thereafter. It is similar to the results already reported in our literature [13]. The main difference is that the sensitivity of the phosphor material decreases with the particle size as expected.…”

Section: Sensitivity and Dose Responsesupporting

confidence: 92%

“…BeO need to take specially because its dust is very toxic and its inhaling could lung deceases called berylliosis. TL/OSL highly sensitive phosphors, are investigated as NaMgF 3 :Eu 2+ [5], NaLi 2 PO 4 :Eu [12], NaLi 2 PO 4 :Ce [10], SiO 2 :Cu [2], LiMgPO 4 :Tb,B [4], Y 3 Al 5 O 12 :C [6], Na 2 SiF 6 :Cu,P [1], Al 2 O 3 :B [14], LiAlO 2 [7], MgO:Tb [3]. However, most of them suffered with their limitations like low sensitivity, high fading, reusability issues, low dose saturation and complicated TL glow curves.…”

Section: Introductionmentioning

confidence: 99%

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Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Bai

Sahare

Singh

et al. 2022

Jour. Atom. Mol. Conden. Matt. Nano Physics

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We report the optically stimulated luminescence of Eu 3+ doped NaLi 2 PO 4 synthesized by solid state diffusion method which is crushed and sieved further using Ball milled for different time period (1 to 10 days) with different particle sizes ranging from micro to nano sizes are obtained. Formation of the material was confirmed by XRD analysis and matched peak to peak with JCPDS#80-2110. Scanning electron microscope (SEM) images were used for determining its particle size(s). Optically stimulated luminescence (OSL) characteristics were studied to see the effect of particle size after irradiating with γ-rays from Co 60 source for wide dose range (10 Gy-100 KGy). It was found that OSL sensitivity depends on particle size of the material. Easy method of synthesis, good sensitivity, low fading, good chemical stability, etc. make this OSLD nano phosphor a good candidate for radiation dosimetry using OSL.

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Section: Sensitivity and Dose Responsesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Bai

Sahare

Singh

et al. 2022

Jour. Atom. Mol. Conden. Matt. Nano Physics

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“…In situ cooling of the mixture up to 573 K was achieved by keeping it in the furnace for about 20 minutes aer switching off the furnace as per the suggestion prescribed by other workers. 18 Aer this, the powder was taken out from the furnace and was kept on an alumina plate at room temperature. The powder and pellet form of the same mixture was used for further studies.…”

Section: Materials Synthesismentioning

confidence: 99%

Facile synthesis of KCl:Sm³⁺ nanophosphor as a new OSL dosimetric material achieved through charge transfer between the defect states

et al. 2017

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Since precise control of nanoscale features is in high demand, it is being exploited to develop and improve OSL dosimetric materials, where striking improvement might also be expected in lanthanide-doped metal halides. The major challenge in the development of a nanophosphor lies in avoiding the aggregation of a dopant element in host materials, which has long prevented an in-depth exploration for the same purpose. This study focuses on the synthesis and characterization of Sm-doped KCl nanophosphors to develop a novel accession to investigate the highly sensitive trivalent Sm-doped KCl phosphor. Herein, we were able to overcome the aggregation phenomena and we showed that Sm-doped KCl with 0.45 mol% of Sm, which is the optimised dopant concentration, exhibits the high-intensity luminescence performance under blue light stimulation for the gamma doses in the range from 100 mGy to 1000 Gy.This sensitivity is attributed to the uniform nanospheres encapsulated in KCl along with the predominant existence of a trivalent (Sm 3+ ) state, where these conditions can introduce additional defects centres.The presence of these additional defect centres was confirmed by photoluminescence studies, plausibly supporting the charge transfer due to the optical energy between these states, leading to high sensitivity.To establish KCl:Sm as a good OSL dosimetric materials (DM), we investigated fading, reusability, and reproducibility and compared these with those of commercial DM compounds such as Al 2 O 3 :C and BeO. Overall, Sm-doped KCl is non-toxic, cost-effective, robust, and a promising candidate for reusable dosimetry.

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“…[2][3][4]. It has been found that some thermoluminescence dosimeter (TLD) materials may change their thermoluminescence (TL) characteristics on annealing at different temperatures and/or on heating and cooling several times during readouts for its reuse and could lose their reusability [5]. There is decrease in the efficiency of luminescence due to this which is generally termed as thermal quenching [6].…”

Section: Introductionmentioning

confidence: 99%

“…Since last one decade many researchers have synthesized and studied a range of materials as OSL phosphors, such as, NaLi2PO4:Eu [5], MgO:Tb [9], NaMgF3:Eu 2+ [10], Y3Al5O12:C [11], Al2O3:B [12], LiMgPO4:Tb, B [13], LiAlO2 [14], K2Ca2(SO4)3:Cu [15], Na2SiF6:Cu,P [16], NaLi2PO4:Ce 3+ [17]. However, no phosphor could find sensitivity comparable to Al2O3:C (commercially available α-Al2O3:C of Landauer Inc.).…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence, photoluminescence and optically stimulated luminescence characteristics of CaSO4:Eu phosphor: Experimental and density functional theory (DFT) investigations

Mandlik

Rondiya

Dzade

et al. 2020

Journal of Luminescence

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The CaSO4:Eu phosphor in nanocrystalline form was obtained by chemical method. The sample was annealed at various temperatures and quenched. The structural, electronic and optical properties are studied using various experimental techniques. As synthesized CaSO4:Eu particles have nanorod shapes with diameter of ~15 nm and length of ~250 nm. After annealing (at around 900 °C) a significant increase in their size (~2-4 μm) with phase transformation from hexagonal to orthorhombic was observed. Thermoluminescence (TL) and optically stimulated luminescence (OSL) intensities were found to increase with temperatureup to 900 °C and decrease thereafter for 1 Gy of test dose of -rays from 90 Sr-90 Yr source. However, the maximum OSL sensitivity was found to be more than that of CaSO4:Eu microcrystalline phosphor (prepared by acid recrystallization method) contrary to the usually found in the literature but much less than that of commercially available α-Al2O3:C phosphor. The activation energy for thermally assisted OSL process was found to be 0.0572 ± 0.0028 eV. The dose ranges of TL and OSL response was found from 0.04 Gy to 100 Gy and 0.02 Gy to 100 Gy, respectively. The experimental results are also correlated with computational calculations based on density functional theory (DFT). The crystal structures and electronic structures of both hexagonal and orthorhombic CaSO4 and CaSO4:Eu materials show that they are direct bandgap (5.67−5.86 eV) insulators, with Ca 2+

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A new high sensitivity Na₂LiPO₄:Eu OSL phosphor

Abstract: A new high sensitivity Na2LiPO4:Eu optically stimulated luminescence dosimeter (OSLD) material was prepared by a simple solid-state diffusion method.

Cited by 16 publications

References 26 publications

Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Facile synthesis of KCl:Sm³⁺ nanophosphor as a new OSL dosimetric material achieved through charge transfer between the defect states

Thermoluminescence, photoluminescence and optically stimulated luminescence characteristics of CaSO4:Eu phosphor: Experimental and density functional theory (DFT) investigations

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A new high sensitivity Na2LiPO4:Eu OSL phosphor

Abstract: A new high sensitivity Na2LiPO4:Eu optically stimulated luminescence dosimeter (OSLD) material was prepared by a simple solid-state diffusion method.

Cited by 16 publications

References 26 publications

Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Optically Stimulated Luminescence in Eu\(^{3+}\) Doped NaLi\(_2\)PO\(_4\) Phosphor: Studies on Effect of Particle Size

Facile synthesis of KCl:Sm3+ nanophosphor as a new OSL dosimetric material achieved through charge transfer between the defect states

Thermoluminescence, photoluminescence and optically stimulated luminescence characteristics of CaSO4:Eu phosphor: Experimental and density functional theory (DFT) investigations

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A new high sensitivity Na₂LiPO₄:Eu OSL phosphor

Facile synthesis of KCl:Sm³⁺ nanophosphor as a new OSL dosimetric material achieved through charge transfer between the defect states