Influence of reducing annealing on the luminescent properties of Li2B4O7:Cu single crystals

Holovey, V. M.; Sidey, Vasyl; Lyamayev, V.; Puga, P. P.

doi:10.1016/j.jlumin.2006.08.089

Cited by 26 publications

(15 citation statements)

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“…Srivastava [36] founded his studies on a radiation dose of 100 Gy. Xiong [34] irradiated the samples from low doses as 0.1 -1 Gy up to 2000 Gy Holovey et al [41,42] who based his studies on different annealing conditions worked on a moderate dose of 1.7 Gy. In order to detect the existence of TL response a medium dose may be sufficient, for instance exposing lithium tetraborate doped with copper to 4.5 Gy radiations was found adequate [17].…”

Section: Tl Measurement Of Lithium Boratesmentioning

confidence: 99%

“…It was observed that TL peaks shifted towards higher temperature regions accompanied by a decrease in the intensity of the main peak with an increase in heating rate although the shapes of the glow curves did not display any change as a function of the heating rate. The other common heating rates employed for lithium tetraborate are 0.5 K/s [41][42][43] [17]. In all of the TL research made on lithium tetraborate the maximum temperature reached is around 400 o C since the main peak is expected around 200 o C.…”

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: Tl Measurement Of Lithium Boratesmentioning

confidence: 99%

Section: Tl Measurement Of Lithium Boratesmentioning

confidence: 99%

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

Pekpak¹,

Yılmaz²,

Özbayoğlu³

2010

TOMPJ

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“…The most promising from this point of view are the copper, silver and manganese dopants, for which the best photoluminescence characteristic indices were achieved [1][2][3][4][5][6][7][8][9] dependent on the criteria of the choice of the dopant type. In the most, such studies have been carried out for the monocrystalline lithium tetraborate--based phosphorus.…”

Section: Introductionmentioning

confidence: 99%

X-Ray Luminescence of Crystallized Silver, Copper and Manganese-Doped Lithium Tetraborate

et al. 2010

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“…Doped with multiple impurities Cu, Ag, P it demonstrates an outstanding sensitivity exceeding that of the well-known LiF:Mg,Ti (Prokic, 2002). Inspired by this research, a number of papers dealt with photo-and recombination luminescence of lithium tetraborate doped with single cationic impurities such as Cu, Ag, Mn, Eu in order to clarify the role of particular impurities in recombination luminescence relevant for dosimetry (Ignatovich et al, 2004(Ignatovich et al, , 2007Holovey et al, 2007;Corradi et al, 2008). It has been shown that Cu + or Ag + ions play the role of efficient luminescence centres in LTB.…”

Section: Introductionmentioning

confidence: 99%

Recombination luminescence in Li2B4O7 doped with manganese and copper

Nagirnyi

Aleksanyan

Corradi

et al. 2013

Radiation Measurements

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HIGHLIGHTSDoped Li 2 B 4 O 7 ceramics were studied by EPR and optical spectroscopy.In Li 2 B 4 O 7 :Mn ceramics Mn 2+ emission is observed for the TSL peaks at 90 and 490 K.We propose the release of holes to be responsible for the dosimetric peak at 490 K. AbstractNon-irradiated and irradiated ceramics of Li 2 B 4 O 7 :Mn, Li 2 B 4 O 7 :Mn,Be, and Li 2 B 4 O 7 :Mn,Cu were studied using electron paramagnetic resonance and luminescence spectroscopy. The emission of Mn 2+ centres is observed in the thermoluminescence spectra of the lowtemperature and dosimetric high-temperature glow peaks in irradiated samples. Arguments are given in favour of hole mobility being responsible for the dosimetric thermoluminescence peak at 490 K in Li 2 B 4 O 7 :Mn. The co-doping of Li 2 B 4 O 7 :Mn with Cu + is shown to increase the sensitivity of the material to ionizing radiation.

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Influence of reducing annealing on the luminescent properties of Li2B4O7:Cu single crystals

Cited by 26 publications

References 15 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

X-Ray Luminescence of Crystallized Silver, Copper and Manganese-Doped Lithium Tetraborate

Recombination luminescence in Li2B4O7 doped with manganese and copper

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