Thermoluminescence characteristics of a novel Li2MoO4 phosphor: Heating rate, dose response and kinetic parameters

Souadi, G.; Kaynar, Ümit H.; Oglakci, M.; Sonsuz, M.; Ayvacıklı, M.; Topaksu, M.; Canımoğlu, A.; Can, N.

doi:10.1016/j.radphyschem.2022.110025

Cited by 13 publications

(11 citation statements)

References 20 publications

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“…The inset figure displays that Bi 3+ has worse thermal stability Sm 3+ . The activation energy of phosphors can be determined using the Arrhenius Formula (10) [34,35]:…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence and Temperature Sensing Properties of Bi3+/Sm3+ Co-Doped La2MgSnO6 Phosphor for Optical Thermometer

Qian

Muhammad

et al. 2023

Crystals

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The optical temperature sensor utilizing the fluorescence intensity ratio (FIR) has garnered significant attention in the past few years due to its rapid response, robust anti-interference capability, remote control feature, and other advantages. In this study, the high-temperature solid-phase approach was used to fabricate a variety of double perovskite-structured La2MgSnO6: Bi3+, Sm3+ (LMS: Bi3+, Sm3+) phosphors. The Rietveld refinement data of XRD and the Gaussian fitting of the emission peak of LMS: 0.02Bi3+ phosphor indicated Bi3+ occupies three lattice sites. The calculation and analysis of average lifetime and energy transfer efficiency substantiated the presence of energy transfer from Bi3+ to Sm3+, with a transfer efficiency of up to 59.07%. The emission intensity of LMS: 0.02Bi3+, 0.05Sm3+ at 403 K maintains 50.2% at the condition of room temperature. The FIR fitting and calculation demonstrated that LMS: 0.02Bi3+, 0.05Sm3+ phosphor possessed good optical temperature sensitivity, with a maximum absolute sensitivity Sa-max of 0.0055 K−1 and a maximum relative sensitivity Sr-max of 0.88% K−1, demonstrating its valuable potential applications for optical temperature sensors.

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“…The inset figure displays that Bi 3+ has worse thermal stability Sm 3+ . The activation energy of phosphors can be determined using the Arrhenius Formula (10) [34,35]:…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence and Temperature Sensing Properties of Bi3+/Sm3+ Co-Doped La2MgSnO6 Phosphor for Optical Thermometer

Qian

Muhammad

et al. 2023

Crystals

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“…This can be attributed to a temperature lag caused by the thermal contact between the heater and the sample. Moreover, the thickness of the sample plays a crucial role in determining the temperature gradient and temperature lag, particularly when higher heating rates are employed [13,[17][18][19].…”

Section: Effects Of Heating-ratementioning

confidence: 99%

Investigation of zinc polycarboxylate cement used in dental treatments in terms of retrospective dosimeter

Toktamış,

Halidoğlu,

Toktamış

2024

Luminescence

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Zinc polycarboxylate cement is one of the few dental materials that demonstrate true adhesion to tooth structure. It is suitable for use in living organisms without causing harm. Its strong adhesion to teeth and low level of irritancy are two important parameters for the dental applications. In this study, the dosimetry properties of zinc polycarboxylate cement using thermoluminescence (TL) method were investigated and determined the effectiveness of its use as a good dosimeter. According to the results of this study, the sample shows a good TL properties with three main peaks found around 140°C, 220°C and 330°C. It has a wide linear dose response between 72 Gy and 2.3 kGy and good reusability of the TL peak found at 330°C. Unfortunately, the TL peak intensity values are rapidly faded within a short waiting time interval. Zinc polycarboxylate cement, which is frequently used in dental crowns, can be used as a retrospective dosimeter for measuring the amount of radiation in space studies and nuclear accidents due to its wide linear dose–response curve in the high dose region.

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“…As the gamma dose increases the trap centers get filled with charge carriers, further due to thermal simulation the trapped charge carriers become free and recombine with their counterparts at the recombination centers. However, at a certain optimum dose value, all the charge carriers get released and there are no more charge carriers for ionization (Souadi et al, 2022). Frontiers in Chemistry frontiersin.org heating rates varying from 2-5 Cs −1 range.…”

Section: Thermoluminescence (Tl) Studiesmentioning

confidence: 99%

“…Defects can be generated in two ways, viz., i) Structural defects created during material preparation and ii) defects created by adding doping material into the host material; in a few cases defects can also be created by exposure to radiations. The defects should be capable of holding the electrons and holes when exposed to ionizing radiations ( Souadi et al, 2022 ). The trapped electrons/holes stored inside the material reach the optimized temperature by producing TL emissions in the crystalline material.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of MgO nanoparticles and its antibacterial properties

et al. 2023

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Magnesium oxide nanostructured particles (NP) were prepared using a simple solution combustion technique using different leaf extracts such as Mangifera indica (Mango - Ma), Azadirachta indica (Neem—Ne), and Carica papaya (Papaya—Pa) as surfactants. The highly crystalline phase of MgO nanostructures was confirmed by PXRD and FTIR studies for 2 h 500°C calcined samples. To analyze the characteristics of obtained material–MaNP, NeNP, and PaNP for dosimetry applications, thermoluminescence (TL) studies were carried out for Co-60 gamma rays irradiated samples in the dose range 10–50 KGy; PaNP and NeNP exhibited well-defined glow curve when compared with MaNP samples. In addition, it was observed that the TL intensity decreases, with increase in gamma dose and the glow peak temperature is shifted towards the higher temperature with the increase in heating rate. The glow peak was segregated using glow curve deconvolution and thermal cleaning method. Kinetic parameters estimated using Chen’s method, trap depth (E), and frequency factor (s) were found to be 0.699, 7.408, 0.4929, and 38.71, 11.008, and 10.71 for PaNP, NeNP, and MaNP respectively. The well-resolved glow curve, good linear behavior in the dose range of 10–50, KGy, and less fading were observed in PaNP as compared with MaNP and NeNP. Further, the antibacterial activity was checked against human pathogens such as Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. A visible zone of clearance was observed at 200 and 100 μg/mL by the PaNP and NeNP, indicating the death of colonies by the nanoparticles. Therefore, PaNP nanomaterial is a potential phosphor material for dosimetry and antibacterial application compared to NeNP and MaNP.

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Thermoluminescence characteristics of a novel Li2MoO4 phosphor: Heating rate, dose response and kinetic parameters

Cited by 13 publications

References 20 publications

Photoluminescence and Temperature Sensing Properties of Bi3+/Sm3+ Co-Doped La2MgSnO6 Phosphor for Optical Thermometer

Photoluminescence and Temperature Sensing Properties of Bi3+/Sm3+ Co-Doped La2MgSnO6 Phosphor for Optical Thermometer

Investigation of zinc polycarboxylate cement used in dental treatments in terms of retrospective dosimeter

Green synthesis of MgO nanoparticles and its antibacterial properties

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