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Madkhli AY, Jabali DA, Souadi G, Sonsuz M, Kaynar UH, Akça-Özalp S, Ayvacikli M, Madkhali O, Topaksu M, Can N. Beta irradiation-induced thermoluminescence: Glow curve analysis and kinetic parameters in combustion-synthesized undoped Ca 4YO(BO 3) 3. Appl Radiat Isot 2024; 208:111301. [PMID: 38522263 DOI: 10.1016/j.apradiso.2024.111301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/09/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
This study examines the thermoluminescent (TL) properties of undoped Ca4YO(BO3)3 phosphor, focusing on how it behaves under a variety of experimental conditions. The IRSL-TL 565 nm was chosen as the appropriate detection filter among various optical detection filter combinations. During the preheating trials conducted at a rate of 2 °C/s, the TL peak exhibited increased intensity, particularly around 200 °C. The experimental outcomes demonstrated a reliable linear relationship (R2 = 0.996 and b = 1.015) in the dose response of undoped preheated Ca4YO(BO3)3 within the range of 1-200 Gy. The investigation encompasses a range of techniques, including the TM-Tstop method, computerized glow curve deconvolution (CGCD) analysis, and theoretical modelling. The application of the TM-Tstop method to samples irradiated with a 5 Gy dose revealed distinct zones on the TM versus Tstop diagram, signifying the presence of at least two discernible components within the TL glow curve, specifically, a single general order kinetics peak and a continuous distribution. The analysis of activation energy versus preheated temperature exhibited a stepwise curve, indicating five trap levels with depths ranging between 1.13 eV and 1.40 eV. The CGCD method also revealed the superposition of at least five distinct TL glow peaks. It was observed that their activation energies were consistent with the Tm-Tstop experiment. Furthermore, the low Figure of Merit (FOM) value of 1.18% indicates high reliability in the goodness-of-fit measure. These findings affirm the reliability and effectiveness of the employed methods in characterizing the TL properties of the Ca4YO(BO3)3 phosphor under investigation. Theoretical models, including the semi-localized transition model, were introduced to explain anomalous observations in TL glow peak intensities and heating rate patterns. While providing a conceptual framework, these models may require adjustments to accurately capture the specific characteristics uncovered through CGCD analysis. As a potential application, the study suggests that the characterized TL properties of Ca4YO(BO3)3 phosphor could be utilized in dosimetric applications, such as radiation dose measurements, owing to its reliable linear response within a broad dose range.
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Affiliation(s)
- A Y Madkhli
- Jazan University, College of Science, Department of Physical Sciences, Physics Division, P.O. Box 114, 45142, Jazan, Kingdom of Saudi Arabia
| | - D A Jabali
- Jazan University, College of Science, Department of Physical Sciences, Physics Division, P.O. Box 114, 45142, Jazan, Kingdom of Saudi Arabia
| | - G Souadi
- Jazan University, College of Science, Department of Physical Sciences, Physics Division, P.O. Box 114, 45142, Jazan, Kingdom of Saudi Arabia
| | - M Sonsuz
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - U H Kaynar
- Bakırcay University, Faculty of Engineering and Architecture, Department of Fundamental Sciences, Menemen, Izmir, Turkiye; Bakırçay University, Biomedical Technologies Design Application and Research Center, Menemen, Izmir, Turkiye
| | - S Akça-Özalp
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - M Ayvacikli
- Manisa Celal Bayar University, Hasan Ferdi Turgutlu Technology Faculty, Mechatronics Engineering, Turgutlu-Manisa, Turkiye
| | - O Madkhali
- Jazan University, College of Science, Department of Physical Sciences, Physics Division, P.O. Box 114, 45142, Jazan, Kingdom of Saudi Arabia
| | - M Topaksu
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - N Can
- Jazan University, College of Science, Department of Physical Sciences, Physics Division, P.O. Box 114, 45142, Jazan, Kingdom of Saudi Arabia.
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Alajlani Y, Sonsuz M, Barad A, Kaynar ÜH, Ayvacikli M, Topaksu M, Can N. Thermoluminescence in GdAl 3(BO 3) 4 phosphors: Unusual heating rate dependencies, dose responses and kinetic parameters. Appl Radiat Isot 2023; 198:110851. [PMID: 37182394 DOI: 10.1016/j.apradiso.2023.110851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/02/2023] [Accepted: 05/08/2023] [Indexed: 05/16/2023]
Abstract
The current study focuses on the production of GdAl3(BO3)4 (GAB) phosphors using gel combustion. X-ray diffraction (XRD) and thermoluminescent (TL) methods were used to investigate the structural and thermoluminescence (TL) features of the samples. XRD results revealed that GAB phosphors were crystallized in a rhombohedral crystal system. TL experimental data exhibited an unusual heating rate behaviour, which was explained by the semi-localized transition model, and this provides valuable insight into the properties of the GAB sample. Beta-irradiated GAB hosts exhibit two primary peaks at 106 °C and 277 °C on their TL glow curves. We have employed a variety of heating rates (VHRs), TM-Tstop method, and computerized glow curve deconvolution (CGCD) techniques. By using a combination of these techniques, we can identify the kinetic parameters of the GAB samples more accurately, including peak numbers, activation energy, and frequency factors. Both Tm-Tstop and CGCD techniques produce similar results in terms of trap numbers and trap depths. In the trap centers, electrons were trapped at 1.05 eV, 0.84 eV, 1.12 eV, 1.20 eV, 1.42 eV, 1.63 eV and 1.42 eV. There was a linear behaviour of GAB samples over a dose range of 0.1 Gy-10 Gy. GAB phosphors did not show any significant changes in TL response with repeated irradiation cycles, suggesting that it is a reliable radiation dosimeter. GAB is therefore a potential candidate for radiotherapy dose measurement based on these findings.
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Affiliation(s)
- Y Alajlani
- Department of Physics, College of Science, Jazan University, P.O. Box. 114, Jazan, 45142, Kingdom of Saudi Arabia
| | - M Sonsuz
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - A Barad
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - Ümit H Kaynar
- Bakırcay University, Faculty of Engineering and Architecture, Department of Fundamental Sciences, Menemen, Izmir, Turkiye
| | - M Ayvacikli
- Manisa Celal Bayar University, Hasan Ferdi Turgutlu Technology Faculty, Mechatronics Engineering, Turgutlu-Manisa, Turkiye
| | - M Topaksu
- Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkiye
| | - N Can
- Department of Physics, College of Science, Jazan University, P.O. Box. 114, Jazan, 45142, Kingdom of Saudi Arabia.
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Toktamış H, Hatib M, Kılıç Hİ, Çanakçı H. Thermoluminescence studies of calcite conducted by bacterial CaCO 3 precipitation in organic soil. Appl Radiat Isot 2022; 190:110462. [PMID: 36174334 DOI: 10.1016/j.apradiso.2022.110462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 11/16/2022]
Abstract
In this study, the thermoluminescence (TL) properties of the calcite conducted by bacterial calcium carbonate (CaCO3) precipitation (BCCP) in organic soils were investigated. The bacterial calcium carbonate (CaCO3) precipitation (BCCP) is a popular technique and has been applied in a variety of civil and geotechnical engineering applications. For example, bacterial calcium carbonate precipitation fills the gaps on the organic ground and makes cementing it with the biological method using bacteria. The study reveals that the calcium carbonate mineral called as calcite has a clear TL glow curve with four main peaks located around 90, 140, 210 and 240 °C, a wide linear dose response region between 140Gy and 2.3 kGy is observed. In addition, a good reusability is seen in the high temperature peaks. The TL glow curve peaks are not affected by reusability. Although the dosimetric peaks at 210 and 240 °C appear to be nearly constant, the TL peak intensities at 90 °C and 140 °C completely faded after 24 and 336 h storage time, respectively. The activation energies (Ea) and frequency factors (s) for peaks at 90 °C, 140 °C, 210 °C and 240 °C were evaluated via variable heating rate (VHR). The activation energy of the peaks in the TL glow curve is lying between 0.57eV and 1.04 eV.
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Affiliation(s)
- Hüseyin Toktamış
- University of Gaziantep, Department of Engineering Physics, Gaziantep, Turkey.
| | - Muhammed Hatib
- University of Gaziantep, Department of Engineering Physics, Gaziantep, Turkey
| | - H İbrahim Kılıç
- University of Gaziantep, Department of Biology, Gaziantep, Turkey
| | - Hanifi Çanakçı
- Hasan Kalyoncu University, Department of Civil Engineering, Gaziantep, Turkey
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Souadi G, Kaynar U, Oglakci M, Sonsuz M, Ayvacikli M, Topaksu M, Canimoglu A, Can N. Thermoluminescence characteristics of a novel Li2MoO4 phosphor: Heating rate, dose response and kinetic parameters. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110025] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pagonis V, Kitis G. Standardizing the computerized analysis and modeling of luminescence phenomena: New open-access codes in R and Python. RADIAT MEAS 2022. [DOI: 10.1016/j.radmeas.2022.106730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Portakal-Uçar ZG. Thermoluminescence properties and kinetic parameters of β-irradiated Turkish slate stone. Appl Radiat Isot 2021; 180:110062. [PMID: 34902773 DOI: 10.1016/j.apradiso.2021.110062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/01/2021] [Accepted: 12/07/2021] [Indexed: 11/02/2022]
Abstract
The current study includes a detailed investigation of the thermoluminescence (TL) characteristics and kinetic analysis of beta-irradiated slate stone from Muğla, Turkey. The heating treatment above 400 °C enhanced the visible TL intensity of the maxima, but the trap system is significantly modified with thermal annealing at temperatures higher than 700 °C. The structural, morphological, and chemical analyses of the samples were verified by X-ray diffraction, scanning electron microscope equipped with energy dispersive X-ray spectroscopy, and atomic absorption spectroscopy techniques, respectively. The TL dosimetric parameters of annealed slate stone including TL glow curves, reusability, fading characteristics, dose response, and heating rate behavior have been studied in detail. There are four apparent TL maxima in the glow curves for both non-annealed and annealed powdered samples, while the natural emission has shown a presence of 395 °C TL maximum as a form of spurious signal that was observed within a few hours during the storage time analysis as well. The material has proven to have very good reusability within the confidence interval (less than ± 5%). A linear response in the dose range of 0.1-103 Gy was achieved when the peak maximum at 258 °C is examined. The kinetic analysis was achieved using TM-Tstop, initial rise, and computing glow curve deconvolution methods. The TL glow curve of the beta-irradiated slate stone annealed at 700 °C consisted of twelve overlapping TL peaks by following first- and general order kinetics.
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Affiliation(s)
- Z G Portakal-Uçar
- Çukurova University, Faculty of Arts and Sciences, Physics Department, 01330, Adana, Turkey.
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Computerized glow curve deconvolution (CGCD): A comparison using asymptotic vs rational approximation in thermoluminescence kinetic models. Appl Radiat Isot 2021; 179:110014. [PMID: 34785443 DOI: 10.1016/j.apradiso.2021.110014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/11/2021] [Accepted: 11/01/2021] [Indexed: 11/23/2022]
Abstract
In this study an open-source tool GCD Analyzer, based on Microsoft® Excel, for Computerized Glow Curve Deconvolution analysis (CGCD) of thermoluminescence (TL) glow peak has been developed using a more accurate rational approximation. It is capable of deconvolution of glow curves having discrete or continuous trap distribution and can be used for routine as well as emergency radiation dosimetric analysis. This tool has a unique feature of TL glow curve analysis by combining discrete and continuous energy distributions for crystalline, amorphous, and mixed materials. To obtain best values of trap parameters like activation energy (E), frequency factor (s), order of kinetics (b), GCD Analyzer has the capability of analyzing glow curve using selectable individual peak of various physical kinetic models i.e. FOK, SOK, GOK, MOK, and Continuous Traps Distribution (CTD) with subtraction of optional background signal. The residual graph gives a clear visual understanding of the Figure of Merit (F.O.M). A comparison of asymptotic and rational approximation to the built-in second order exponential integral function E2(E/KT) for E/KT < 600 is also presented. The results are verified by deconvolution of test synthetic glow curves with F.O.M up to 0.0005%, experimental glow curve for CTD with F.O.M of 0.9781%, and in the case of GLOWCANIN project glow curves, the F.O.M is comparable to the least values achieved by inter-comparison participants.
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Gamma ray shielding and thermoluminescence investigation of bismuth added heavy metal oxide glasses. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109598] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Uzun E. Analysis of alpha-alumina by variable dose and T m -T STOP methods and simulations of the whole process. LUMINESCENCE 2021; 36:1402-1411. [PMID: 33931934 DOI: 10.1002/bio.4067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 11/07/2022]
Abstract
The Tm -TSTOP and the variable dose methods were applied to alumina experimentally, and then all the steps of the methods were simulated numerically. The Tm -TSTOP experiments were performed between 70 and 300°C, and results showed that the glow curve of the used alumina had six distinct peaks between 40 and 400°C. The glow curves were analyzed using computerized glow curve fitting programs, the analytical equations were also fitted to the experimental data, and the trapping parameters of the peaks were measured. The samples were irradiated above the saturation level to ensure the complete filling of the electron traps and, therefore, the concentrations of traps were measured experimentally. Short-term anomalous fading behaviours of the peaks were investigated, and a new equation was proposed to compute the anomalous fading rate. In addition, the variable dose and Tm -TSTOP methods were simulated using the six trap-one recombination centre (6T1C) model and the experimental trapping parameters. Results showed that there was good harmony between numerical and experimental glow curves. After all the simulations were performed with acceptable accuracy, an estimate was made for the trapping coefficients (Ai = 1-6 ) that could not be measured directly from thermoluminescence experiments. Results showed that the trapping coefficients were affected by the applied dose.
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Affiliation(s)
- Erdem Uzun
- Faculty of Kamil Özdağ Science, Department of Physics, Karamanoglu Mehmetbey University, Karaman, Turkey
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10
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Thermoluminescence glow-curve deconvolution using analytical expressions: A unified presentation. Appl Radiat Isot 2020; 168:109440. [PMID: 33268224 DOI: 10.1016/j.apradiso.2020.109440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 11/23/2022]
Abstract
This study provides a unified presentation of thermoluminescence (TL) glow-curve deconvolution within the framework of the open source R package "tgcd", according to various analytical expressions that describe first-, second-, general-, and mixed-order kinetics as well as the recently developed semi-analytical expressions that derive from the one trap-one recombination center (OTOR) model that utilizes the Lambert W function or the Wright Omega function. We provide a comprehensive, flexible, convenient, and openly accessible program to analyze TL glow curves according to different models and expressions. The consistency of kinetic parameters determined using different model expressions was assessed using measured TL glow curve of CaF2:Dy. The performance of the computerized glow curve deconvolution (CGCD) method was also tested using simulated glow curves. Results revealed the benefits of comparing kinetic parameters determined from different model expressions and those obtained using experimental TL evaluation methods to assess the reliability of deconvolution results. The accuracy of the CGCD method is dependent upon both the model expressions used and the intrinsic trapping parameters of the TL material.
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Sadek AM, Pagonis V, Kitis G. Influence of scatter data and temperature lag on the analysis of thermoluminescence glow peak: A Monte Carlo simulation study. Appl Radiat Isot 2020; 167:109405. [PMID: 33039756 DOI: 10.1016/j.apradiso.2020.109405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 08/13/2020] [Accepted: 08/31/2020] [Indexed: 11/19/2022]
Abstract
The effects of the scattering data that might appear at the low radiation doses and the temperature lag that might occur between the heater pan and the detector on the thermoluminescence (TL) glow-curve have been addressed. The scattering data were mathematically induced in the TL glow curve using the Monte Carlo (MC) algorithm. While the phenomenon of the temperature lag has been simulated, assuming an exponential function. The deconvolution analysis has been carried out by TL expressions based on a presumed kinetics order value in comparison with the general-order kinetics equation. It has been found that even though the glow peak is known to obey the first- or second-order kinetics model, using the general-order kinetics equation in the deconvolution analysis is better than using the corresponding model equation.
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Affiliation(s)
- A M Sadek
- Ionizing Radiation Metrology Department, National Institute for Standards (NIS), Egypt.
| | - Vasilis Pagonis
- Physics Department, McDaniel College, Westminster, MD, 21157, USA
| | - G Kitis
- Nuclear Physics and Elementary Particles Physics Section, Physics Department, Aristotle University of Thessaloniki, Greece
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Benavente J, Gómez-Ros J, Correcher V. Characterization of the thermoluminescence glow curve of Li2B4O7:Cu,Ag. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106427] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Kitis G, Polymeris GS, Pagonis V. Stimulated luminescence emission: From phenomenological models to master analytical equations. Appl Radiat Isot 2019; 153:108797. [DOI: 10.1016/j.apradiso.2019.05.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 10/26/2022]
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Daneshvar H, Shafaei M, Manouchehri F, Kakaei S, Ziaie F. The role of La, Eu, Gd, and Dy lanthanides on thermoluminescence characteristics of nano-hydroxyapatite induced by gamma radiation. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1162-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Benavente JF, Gómez-Ros JM, Romero AM. Thermoluminescence glow curve deconvolution for discrete and continuous trap distributions. Appl Radiat Isot 2019; 153:108843. [PMID: 31404764 DOI: 10.1016/j.apradiso.2019.108843] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/19/2019] [Accepted: 08/05/2019] [Indexed: 11/30/2022]
Abstract
Deconvolution analysis of the thermoluminiscent (TL) glow curves proved to be a good complementary method to characterize the individual glow peaks by fitting their kinetic parameters. In this work, new software has been developed for the automatic deconvolution of TL glow curves, assuming either discrete or continuous distribution of trapping centres. The guess estimation of the kinetic parameters is done automatically and can be manually modified, thus allowing the use of the software for routine, processing a large number of measurements, as well as for research purposes. The equations, the methods and the results of the first test are described in detail. The software has been developed by integrating Fortran code and Visual Studio tools to create a graphic easy-to-use environment and permits to obtain the fitted values for the parameters according to the considered model.
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Affiliation(s)
| | | | - A M Romero
- CIEMAT, Av. Complutense 40, E-28040, Madrid, Spain
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Zahedifar M, Sadeghi E. Thermoluminescence dosimetry properties of new Cu doped CaF(2) nanoparticles. RADIATION PROTECTION DOSIMETRY 2013; 157:303-309. [PMID: 23765071 DOI: 10.1093/rpd/nct151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanoparticles of Cu-doped calcium fluoride were synthesised by using the hydrothermal method. The structure of the prepared nanomaterial was characterised by the X-ray diffraction (XRD) pattern and energy dispersive spectrometer. The particle size of 36 nm was calculated from the XRD data. Its shape and size were also observed by scanning electron microscope. Thermoluminescence (TL) and photoluminescence of the produced phosphor were also considered. The computerised glow curve deconvolution procedure was used to identify the number of glow peaks included in the TL glow curve of the CaF2:Cu nanoparticles. The TL glow curve contains two overlapping glow peaks at ∼413 and 451 K. The TL response of this phosphor was studied for different Cu concentrations and the maximum sensitivity was found at 1 mol% of Cu impurity. Other dosimetric characteristics of the synthesised nanophosphor are also presented and discussed.
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Affiliation(s)
- M Zahedifar
- Physics Department, University of Kashan, Kashan, I.R. Iran
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Thermoluminescence kinetics analysis of α-Al2O3:C at different dose levels and populations of trapping states and a model for its dose response. RADIAT MEAS 2012. [DOI: 10.1016/j.radmeas.2012.07.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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A comparative thermoluminescence and electron spin resonance study of synthetic carbonated A-type hydroxyapatite. Appl Radiat Isot 2012; 70:533-7. [DOI: 10.1016/j.apradiso.2011.11.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 11/19/2022]
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Gómez-Ros JM, Furetta C, Correcher V. Simple methods to analyse thermoluminescence glow curves assuming arbitrary recombination-retrapping rates. RADIATION PROTECTION DOSIMETRY 2006; 119:339-43. [PMID: 16735569 DOI: 10.1093/rpd/nci523] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Numerical solutions of the differential equations system describing the transitions between energy levels can help in the understanding of the physical mechanisms governing thermoluminescence (TL) emission but they are not suitable for the analysis of complex experimental TL glow curves. On the other hand, simplified descriptions, as mixed or general order kinetics, require many additional assumptions that may limit the validity of the results or are mostly empirical. In this paper, the accuracy of such approximations has been evaluated for different retrapping-recombination ratios and it has been found that differences between the fitted and the simulated parameters arise from the simplification of the models because quasi-equilibrium condition seems to be valid in all the considered cases.
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Gómez-Ros JM, Correcher V, García-Guinea J, Delgado A. Evolution of the trapped charge distribution due to trap emptying processes in a natural aluminosilicate. RADIATION PROTECTION DOSIMETRY 2006; 119:93-7. [PMID: 16709713 DOI: 10.1093/rpd/nci522] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The evolution of the thermoluminescence glow curve of a natural Ca-Be rich aluminosilicate after annealing treatments at different temperatures has been studied in order to evaluate the changes in the trapped charge distribution. The glow curve consists of a single broad peak that continuously shifts toward higher temperatures when the sample is preheated up to increasing temperatures, thus indicating the presence of a continuous trap distribution. The glow curve fitting assuming different distribution functions shows how a gaussian distribution becomes a nearly exponential distribution owing to the thermal leakage of charge carriers from trapping centres.
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Correcher V, Gomez-Ros J, Garcia-Guinea J. Radiation effect on the 400-nm-thermoluminescence emission of a potassium-rich feldspar. RADIAT MEAS 2004. [DOI: 10.1016/j.radmeas.2003.12.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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