The dosimetric properties of in-house prepared copper doped lithium borate examined using the TL-technique

El-Faramawy, Nabil; El‐Kameesy, S. U.; El-Agramy, A. M.; Metwally, G

doi:10.1016/s0969-806x(99)00361-8

Cited by 42 publications

(28 citation statements)

References 6 publications

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“…Copper activated lithium tetraborate in one study [39] was recorded to give two peaks at 120 and 178 o C. As mentioned above, the low temperature peak encountered rapid fading. There is a common procedure applied to avoid such unnecessary peak.…”

Section: Glow Curvementioning

confidence: 89%

“…El-Faramawy et al [39] declared that the samples from his study faded 1.7 % the first day, 7% in the first month, 8.8 % at the end of the second month and 11% after the third month. The sample of Furetta's [12] study displayed similar fading with a percentage of 10 % in three months.…”

Section: Fadingmentioning

confidence: 90%

“…A more official definition is "the dose which gives three times the standard deviation of the zero doses reading of the dosimeter". El-Faramawy et al [39] determined this value as 20Gy.…”

Section: Minimum Detectable Dosementioning

confidence: 99%

“…However pre-readout carries to risk of total loss of signal recorded. Another custom to be followed is performing the readings after 24 h from the irradiation process [39]. The results of the research conducted by Furetta on copper and indium activated lithium tetraborate [12] The intensities of these peaks provided in literature are given in arbitrary units therefore mainly they can be used in comparative manner.…”

Section: Glow Curvementioning

confidence: 99%

“…This is because the resultant response is directly related to the quantity of material. El-Faramawy et al [39] determined the optimum weight interval as 5-10mg to gather the best glow curve illustrations depending on the study of Wall et al [31] which displays the effect of sample weight on the TL signal as in Fig. (7).…”

Section: Tl Measurement Of Lithium Boratesmentioning

confidence: 99%

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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: Glow Curvementioning

confidence: 89%

Section: Fadingmentioning

confidence: 90%

“…A more official definition is "the dose which gives three times the standard deviation of the zero doses reading of the dosimeter". El-Faramawy et al [39] determined this value as 20Gy.…”

Section: Minimum Detectable Dosementioning

confidence: 99%

Section: Glow Curvementioning

confidence: 99%

Section: Tl Measurement Of Lithium Boratesmentioning

confidence: 99%

See 3 more Smart Citations

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

Pekpak¹,

Yılmaz²,

Özbayoğlu³

2010

TOMPJ

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Thermoluminescence characterization of Ag‐doped Li₂B₄O₇ single crystal materials

et al. 2016

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In this study, the thermoluminescence (TL) characteristics of Ag-doped and undoped lithium tetraborate (Li B O , LTB) materials, grown using the Czochralski method, were reported. The TL properties of LTB:Ag, such as glow curve structure, dose response, fading and reproducibility, were investigated. The glow curve of the Li B O :Ag single crystal consists of four peaks located at approximately 75, 130, 190 and 275°C; in undoped LTB, the single crystal shows a broad glow curve with peaks at 65, 90, 125, 160 and 190°C using a heating rate of 5°C/s in the 50-350°C temperature region. The high temperature peak of Ag-doped sample at 275°C has a nonlinear dose response within the range from 33 mGy to 9 Gy. There is a linear response in the range of 33-800 mGy; after which, a sublinear region appears up to 9 Gy for Ag-doped LTB single crystal. For undoped single crystal, the dose response is supralinear for low doses and linear for the region between 1 and 9 Gy. The thermal fading ratio of the undoped material is almost 60% for the high temperature peak after 7 days. Ag-doped LTB single crystal exhibits different behaviour over a period of 7 days.

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Investigation of thermoluminescence properties of metal oxide doped lithium triborate

2007

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The dosimetric properties of in-house prepared copper doped lithium borate examined using the TL-technique

Cited by 42 publications

References 6 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

Thermoluminescence characterization of Ag‐doped Li₂B₄O₇ single crystal materials

Investigation of thermoluminescence properties of metal oxide doped lithium triborate

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The dosimetric properties of in-house prepared copper doped lithium borate examined using the TL-technique

Cited by 42 publications

References 6 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

Thermoluminescence characterization of Ag‐doped Li2B4O7 single crystal materials

Investigation of thermoluminescence properties of metal oxide doped lithium triborate

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Thermoluminescence characterization of Ag‐doped Li₂B₄O₇ single crystal materials