Analysis of TL and OSL kinetics of lithium aluminate

Twardak, A.; Bilski, P.; Marczewska, B.; Gieszczyk, W.

doi:10.1016/j.radmeas.2014.03.012

Cited by 25 publications

(7 citation statements)

References 11 publications

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“…However, these calculated and experimental data do not indicate the nature of the defect centres that are responsible for the OSL processes. 10 However, PL analysis has improved the understanding of the defect centres in KCl:Sm, where we analysed the presence of many energy levels within the forbidden band gap of KCl. Thus, the observed luminescence effect occurs due to an excess of defects centres such as anion vacancies called F-centres.…”

Section: Osl Measurementsmentioning

confidence: 99%

“…9 Compared to commercial Al 2 O 3 :C, a much lower sensitivity was achieved for LiAlO 2 :Cu,P and MgO:Tb. 10 Ammonium salts and Fluorosilicates such as NH 4 Br and (NH 4 ) 2 SiF 6 have also been reported to suffer from the higher fading of more than 80% within 10 hours. Fluorides such as NaMgF 3 :Ce and KMgF 3 :Ce,Eu despite having good OSL sensitivity of about 7-8 times than that of commercial Al 2 O 3 :C could not be adopted for personal dosimetry due to high selfdose and fading.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Osl Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…The main glow peak of LAO:Gd on irradiation with beta, gamma, and neutron was deconvulated into four overlapping peaks using the glow curve deconvulation method (GCD) using general order kinetics (GOK), as shown in Figure . Another group has also reported the presence of six peaks in the glow curve of LAO single crystals . GCD is a very well-known technique based on Kitis equations .…”

Section: Resultsmentioning

confidence: 99%

LiAlO₂:Gd-Based Versatile and Ultrasensitive Detector for Gamma and Neutrons by Thermal and Optical Stimulation

Jopat,

Paul,

Sen

et al. 2024

ACS Appl. Mater. Interfaces

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Considering the low-level dose detection requirement for neutron and γ radiation in cancer therapy, synthesis and exploratory studies have been performed on a newly developed phosphor LiAlO 2 :Gd. Our results reveal that the presence of both Li and Gd makes it sensitive to both gamma and thermal neutrons. The applicability of LiAlO 2 :Gd for beta, gamma, and neutrons in both thermally stimulated and optically stimulated modes has been verified by extensive experiments followed by kinetic parametric evaluation with theoretical calculations. The current work confirms that LiAlO 2 :Gd is a highly sensitive phosphor with a minimum detectable dose of 5.7 μSv for gamma and 92 μSv for themral neutrons. The phosphor is found to show very high sensitivity at low energy and dose. Its ability for detection and discrimination of both gamma and thermal neutrons makes it a potential material to be used in medical dosimetry.

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“…A phosphor with similar properties was also developed at Krakow. [ 541 ] Subsequently, several samples of undoped and carbon or copper‐doped gamma‐ LiAlO 2 were prepared for an OSL material. [ 542 ]…”

Section: Aluminate Phosphors For Applicationsmentioning

confidence: 99%

“…A phosphor with similar properties was also developed at Krakow. [541] Subsequently, several samples of undoped and carbon or copper-doped gamma-LiAlO 2 were prepared for an OSL material. [542] Gamma-LiAlO 2 can also be applied to the mixed field because the 6 Li nuclei have a large cross section for thermal neutron absorption.…”

Section: Osl Phosphors Based On Aluminates (Lialo 2 )mentioning

confidence: 99%

Luminescent Materials Based on Aluminates: A Review

Revankar

Gedekar²,

Moharil

2022

Physica Status Solidi (a)

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An aluminate is a compound containing an oxyanion of aluminum. Many aluminates are found in nature. A large number of phosphors that are used in various applications, such as scintillation detectors, optical thermometry, longlasting phosphorescence, solid-state lighting, solid-state lasers, upconversion, bioimaging, and plasma display panels, are based on aluminate formulae. This review focuses on the synthesis and characteristics of such phosphors. The conventional as well as novel methods of synthesizing these phosphors are reviewed. The emphasis on commercially important aluminate phosphors is discussed.

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Analysis of TL and OSL kinetics of lithium aluminate

Cited by 25 publications

References 11 publications

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

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

LiAlO₂:Gd-Based Versatile and Ultrasensitive Detector for Gamma and Neutrons by Thermal and Optical Stimulation

Luminescent Materials Based on Aluminates: A Review

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Analysis of TL and OSL kinetics of lithium aluminate

Cited by 25 publications

References 11 publications

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

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

LiAlO2:Gd-Based Versatile and Ultrasensitive Detector for Gamma and Neutrons by Thermal and Optical Stimulation

Luminescent Materials Based on Aluminates: A Review

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

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

LiAlO₂:Gd-Based Versatile and Ultrasensitive Detector for Gamma and Neutrons by Thermal and Optical Stimulation