The effect of synthesis and doping procedures on thermoluminescent response of lithium tetraborate

Pekpak, E.; Yılmaz, Ali Özgür; Özbayoğlu, Gülhan

doi:10.1016/j.jallcom.2010.11.055

Cited by 55 publications

(13 citation statements)

References 14 publications

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“…All of these materials gave a glow curve consisting of two glow peaks; the first one is at 383-393 K, and the second one in the range between 458 and 503 K, depending on the activator. Different shapes of glow curves for different synthesis and doping methods of LTB is in agreement with the data for Cu doped LTB, reported by Pekpak et al Cu, Ag and Cu with In and Ag (as co-dopant) doped LTB is reported with good TL performances [26].…”

Section: Methodssupporting

confidence: 89%

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Effects of synthesis, doping methods and metal content on thermoluminescence glow curves of lithium tetraborate

Kayhan

Yılmaz

2011

Journal of Alloys and Compounds

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Section: Methodssupporting

confidence: 89%

“…Transmission electron microscopy (TEM) is a good tool to know local structure and microstructural morphology of the polycrystalline material [27]. TEM studies were conducted to compare the microstructure and crystalline size of the samples, which has different TLD glow curves.…”

Section: Methodsmentioning

confidence: 99%

Effects of synthesis, doping methods and metal content on thermoluminescence glow curves of lithium tetraborate

Kayhan

Yılmaz

2011

Journal of Alloys and Compounds

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“…The vibration modes of the borate network are mainly active in three IR spectra region: 850–1100 cm −1 associated with the B–O stretching of tetrahydral BO 4− units, and 600–800 cm −1 associated with bending vibrations of various borate segments and a band at around 700 cm −1 , which corresponds to bond bending of B–O–B bridges in the boron-oxygen network [29,31–34]. …”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Calcium Borate Nanoparticles and the Annealing Effect on Their Structure and Size

Erfani

Saion

Soltani

et al. 2012

IJMS

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Calcium borate nanoparticles have been synthesized by a thermal treatment method via facile co-precipitation. Differences of annealing temperature and annealing time and their effects on crystal structure, particle size, size distribution and thermal stability of nanoparticles were investigated. The formation of calcium borate compound was characterized by X-ray diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), and Thermogravimetry (TGA). The XRD patterns revealed that the co-precipitated samples annealed at 700 °C for 3 h annealing time formed an amorphous structure and the transformation into a crystalline structure only occurred after 5 h annealing time. It was found that the samples annealed at 900 °C are mostly metaborate (CaB2O4) nanoparticles and tetraborate (CaB4O7) nanoparticles only observed at 970 °C, which was confirmed by FTIR. The TEM images indicated that with increasing the annealing time and temperature, the average particle size increases. TGA analysis confirmed the thermal stability of the annealed samples at higher temperatures.

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“…The majority of previous studies have been focused on the photoluminescence (PL), thermoluminescence and dosimetric properties of various starting materials (copper, silver, magnesium or any combination of these dopants) doped Li 2 B 4 O 7 (El-Faramawy et al, 2000a, b;Huy et al, 2008;Prokic, 2001;Manam and Das, 2010;Laksmanan et al, 1981;Annalakshmi et al, 2011;Doull et al, 2013;Pekpak et al, 2011;Patra et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

TL/OSL studies of Li2B4O7:Cu dosimetric phosphors

Aydın

Demirtaş

Aydın

2013

Radiation Measurements

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h i g h l i g h t sLi 2 B 4 O 7 :Cu as a personal dosimetry was firstly investigated by OSL techniques. Prepared phosphor has good OSL repeatability. Beta dose can be determined with less than 3e4% error by using OSL technique. This is the first study on dose measurement of Li 2 B 4 O 7 :Cu using OSL technique. a b s t r a c t Dosimetric phosphors of Cu-doped lithium tetraborate (Li 2 B 4 O 7 :Cu) were produced using a sintering technique in a laboratory environment and characterized using Scanning Electron Microscopy (SEM) and X-ray Diffractometry (XRD). The thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of powdered (Li 2 B 4 O 7 ) phosphor doped with copper at different concentrations (0.020 e0.025 wt %) were studied. The Cu-doped Li 2 B 4 O 7 phosphor material has two dominant TL glow peaks, and the maximum TL responses of the peaks are at 115 C and 243 C in the range of 0 Ce310 C. The TL response of the Cu-doped lithium tetraborate is approximately 900 times more sensitive than undoped lithium tetraborate. The TL and OSL signal intensities increase as the beta radiation doses increase up to approximately 150.00 Gy and 76.50 Gy, respectively. The OSL doseeresponse curve is linear up to a dose range of 12.00 Gy for Cu-doped Li 2 B 4 O 7 dosimetric phosphors. The time-dependent fading behavior of the Cu-doped lithium tetraborate was found to be quite stable over long time durations. In addition, the repeatability of the OSL dose measurements were determined to be 2/3 lower compared to the TL measurements. The reproducibility of the OSL measurements was approximately 5%. Based on the TL and OSL results, the prepared phosphors can be used to measure beta doses ranging from 10 mGy to 150.00 Gy and 76.50 Gy, respectively, by using the TL and OSL techniques, with confidence limits of approximately 7% and 3e4%, respectively. a r t i c l e i n f o

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The effect of synthesis and doping procedures on thermoluminescent response of lithium tetraborate

Cited by 55 publications

References 14 publications

Effects of synthesis, doping methods and metal content on thermoluminescence glow curves of lithium tetraborate

Effects of synthesis, doping methods and metal content on thermoluminescence glow curves of lithium tetraborate

Facile Synthesis of Calcium Borate Nanoparticles and the Annealing Effect on Their Structure and Size

TL/OSL studies of Li2B4O7:Cu dosimetric phosphors

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