A new evaluation technique for analyzing the thermoluminescence glow curve and calculating the trap parameters

Rasheedy, M.S.

doi:10.1016/j.tca.2005.03.006

Cited by 33 publications

(43 citation statements)

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“…A similar result was also obtained by the CGCD method. The values of the activation energy were calculated by using Gartia, Singh and Mazumdar's [46] PS method for different x-values, the TP method developed by Rasheedy [47], the IR, VHR, CGCD and Chen's [48] PS methods. The results are the average values of the Ea values of P3 obtained by the TP, CGCD, VHR and PS methods of Chen and Gartia, Singh and Mazumdar give very close results which is about 1.05±0.05 eV.…”

Section: Thermoluminescence Kinetic Parameters Of Lithium Borate Compmentioning

confidence: 99%

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

Pekpak¹,

Yılmaz²,

Özbayoğlu³

2010

TOMPJ

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Boron that appears in borate form in nature is an essential additive to a variety of industrial products. Recently, certain boron compounds have attracted attention in high technology utilization areas owing to their special crystal and optical characteristics. Thermoluminescent (TL) dosimetry that is used to record amount of radiation exposure is one of such areas. Two borates searched for candidacy in TL dosimetry are lithium tetraborate and lithium triborate. These materials are synthesized and metal doped by numerous researchers to be tested for thermoluminescence response. Lithium tetraborate has aroused interest of scientists since 1960s by the courtesy of the thermoluminescence (TL) property. However, lithium triborate is rather new in this area. This study compromises a broad overview including synthesis methods employed for the production of these two materials. Furthermore, the TL properties that have significant effect on the TL dosimetry potential of a compound are noted along with the detailed information on TL measurement procedure specifications.Keywords: Thermoluminescence, dosimetry, lithium borates, synthesis, doping, characterization. BORATESThere are several natural and synthetic borates used in different branches of industry. Natural borates are generally cleaned from their impurities in processing plants and are further treated to more qualified end products (like boric acid, anhydrous boric acid, anhydrous borax, borax pentahydrate,borax decahydrate and sodium perborate) in recrystallizer units. Besides, the variability of borate crystal chemistry [1] allows researchers synthesize numerous borate structures usable in high technology areas. Thermoluminescent (TL) dosimetry used to measure radiation exposure is an important high technology utilization area for these synthetic borates. General Uses of Borates in High TechnologyIt is certain that the interesting crystal structure of borates play an important role for its utilization in high technology. Although the utilization variety of borates is strongly related to its structural variety, in this communication we will concentrate on results of these characteristics rather than chemical background. Indeed, there is extensive number of studies devoted to the crystal structures of borates [1][2][3] which may be refered for detailed information.Owing to the varied crystallinity borates possess large electronic band gaps, attractive nonlinear optical (NLO) properties, chemical and environmental stability, and mechanical strength [3]. Hence, they found wide use in *Address correspondence to this author at the Middle East Technical University, Mining Engineering, Ankara, Turkey; Tel: +903122102664; Fax: +903122105822; E-mails: epekpak@metu.edu.tr, ayseny@metu.edu.tr nonlinear optical technologies as well as in thermoluminescence dosimetry.Borates have high UV transmittance at wavelengths down to 155 nm [4]. Therefore, they are appropriate for the use in plasma displays and in laser technology. Furthermore they are strong phosphors which ...

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Section: Thermoluminescence Kinetic Parameters Of Lithium Borate Compmentioning

confidence: 99%

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

Pekpak¹,

Yılmaz²,

Özbayoğlu³

2010

TOMPJ

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“…To apply the GO technique suggested by Rasheedy [17] the three temperature points were selected on the peakshape (PS) plots. For example the data for 0.1 Gy are T 1 = 503 K; T 2 = 563 K and T 3 = 593 K. The value of b, that is the order of kinetics of OSL decay mechanism, was calculated as 1.71 using the Equation (2).…”

Section: Resultsmentioning

confidence: 99%

“…The methods used were: Curve-Fitting of Thermal Analysis, Linear Modulation Technique [16], General Order (GO) [17] Model and Active-OSL (AOSL) Approximation [18,19].…”

Section: Introductionmentioning

confidence: 99%

Dose-Dependence of Trap Parameters of OSL Decay from Al<sub>2</sub>O<sub>3</sub>:C

Tanir

Bölükdemir²,

Ghomi³

2012

WJNST

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Optically Stimulated Luminescence (OSL) trap parameters can only be reliably determined through the detailed analysis of OSL decay curves. In this study the kinetic parameters of a blue-light stimulated luminescence (BLS) decay curve from Al 2 O 3 :C sample irradiated at 0.1, 0.15, 0.2, 0.4 and 0.6 Gy beta doses were obtained using the same basic methods with some modifications applied and also by using our suggestion: Active-OSL Approximation (AOSL). The results were compared with those of other studies on the trap parameters of Al 2 O 3 :C material.

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“…In general, quartz crystals constantly received and accumulated the amount of external radiation. Electrons trapped in deep energy traps require high temperatures demanding excitation sufficient to escape from the trap [27,28], whereas electrons in shallow traps can escape even at lower temperatures. Therefore, older quartz shows relatively stronger high-temperature glow peaks, while later stage quartz shows enhanced lowtemperature peaks [29].…”

Section: Implications For Gold Explorationmentioning

confidence: 99%

Thermoluminescence of quartz from Shihu gold deposit, western Hebei province, China: some implications for gold exploration

Cao

Yao

et al. 2010

Open Geosciences

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Thermoluminescence (TL) of monomineralic separates have been widely used in various geosciences fields in order to trace the thermal history and aid in prospecting for gold deposits. Quartz is a ubiquitous mineral in the Shihu gold deposit, which is situated in the northern part of the Taihang orogenic belt in the North China craton (NCC). The deposit is hosted by ductile-brittle faults within an Archean metamorphic core complex of the Fuping Group. This deposit is characterized by gold-bearing quartz-polymetallic sulfides and quartz veins. New TL results have been obtained for quartz, in which four type-TL glow curves were identified. The gold-bearing quartz present type III glow curves that consist of two peak glow curves at the middle and high peak temperatures with the similar TL intensity. In addition, the cross-sections of peak temperatures and TL intensity highlight the valuable area where the Au-bearing quartz present weak TL intensity and low-middle peak temperatures. Our results significantly enhance the usefulness of quartz in metallogenic studies of the North China craton and as an indicator mineral in mineral exploration of the Taihang Mountain region.

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A new evaluation technique for analyzing the thermoluminescence glow curve and calculating the trap parameters

Cited by 33 publications

References 19 publications

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

Dose-Dependence of Trap Parameters of OSL Decay from Al<sub>2</sub>O<sub>3</sub>:C

Thermoluminescence of quartz from Shihu gold deposit, western Hebei province, China: some implications for gold exploration

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A new evaluation technique for analyzing the thermoluminescence glow curve and calculating the trap parameters

Cited by 33 publications

References 19 publications

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

An Overview on Preparation and TL Characterization of Lithium Borates for Dosimetric Use

Dose-Dependence of Trap Parameters of OSL Decay from Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;:C

Thermoluminescence of quartz from Shihu gold deposit, western Hebei province, China: some implications for gold exploration

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Dose-Dependence of Trap Parameters of OSL Decay from Al<sub>2</sub>O<sub>3</sub>:C