TL properties of newly developed lithium tetraborate single crystals

Fernandes, A.C.; Osvay, M.; Santos, J.P.; Holovey, V. M.; Ignatovych, M.

doi:10.1016/j.radmeas.2008.01.004

Cited by 43 publications

(14 citation statements)

References 8 publications

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“…Based on the observed effects one can supposed that this new broad EPR signal, observed in all investigated Sm-doped borate glasses, belongs to the Sm 3+ -Sm 3+ pair centres, coupled by magnetic dipolar and exchange interaction. 8 In all investigated Sm-doped glasses besides the EPR signals, which are observed at RT and described above at low temperatures (4.2 ÷ 20 K) have been clearly observed additional broad EPR signal with g eff  9.7 (Fig. 4).…”

Section: Epr Spectroscopy Of the Sm-doped Borate Glassessupporting

confidence: 63%

“…In particular, the borate compounds, un-doped and doped with rare-earth and transition elements, are very promising materials for nonlinear optics, quantum electronics and laser technology [1][2][3][4][5], scintillators and thermoluminescent dosimeters [6][7][8][9][10], detectors and transformers of the ionising radiation [11][12], and many other applications [13][14][15]. This especially concerns to the lithium tetraborate (Li 2 B 4 O 7 ) single crystals, which are optically-transparent in the wide spectral region restricted from vacuum ultraviolet (UV) to middle infrared (IR) ranges [16] and have extremely high radiation stability [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Luminescence properties of the Sm-doped borate glasses

Kindrat

Padlyak

Drzewiecki

2015

Journal of Luminescence

112

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Section: Epr Spectroscopy Of the Sm-doped Borate Glassessupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Luminescence properties of the Sm-doped borate glasses

Kindrat

Padlyak

Drzewiecki

2015

Journal of Luminescence

112

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“…Earlier, Jayachandran et al [18] discovered that the sensitivities of manganese doped lithium borate and of LiF (commercially TLD-100) were approximately equal. Fernandes et al [32] who studied sensitivity extensively made relative sensitivity comparisons between commercial dosimeters TLD100, TLD700H, D-3-2 and lithium tetraborate with copper.…”

Section: Sensitivitymentioning

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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“…Several attempts have been made to increase the sensitivity of the phosphor both by changing the dopants and also by changing the preparation methods (Thakare et al, 2007;Wall et al, 1982;Lorrain et al, 1986). Li 2 B 4 O 7 is prepared by a high temperature melting method in the form of single crystals (Park et al, 2003;Fernandes et al, 2008;Takenaga et al, 1980). The TL glow characteristics in terms of its shape and intensity are strongly influenced by the starting materials, their purity, as well as the preparation method.…”

Section: Introductionmentioning

confidence: 99%