Advances in synthesis and characterization of LiMgBO3:Dy3+

Bajaj, N. S.; Omanwar, S. K.

doi:10.1016/j.ijleo.2014.01.110

Cited by 24 publications

(10 citation statements)

References 21 publications

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“…The effective atomic number of LiMgBO 3 was calculated using the formula:

Z_{eff} = \sqrt[2.94]{f_{1} \times {(Z_{1})}^{2.94} + f_{2} \times {(Z_{2})}^{2.94} + f_{3} \times {(Z_{3})}^{2.94} + f_{4} \times {(Z_{4})}^{2.94}}

where. It was found that LiMgBO 3 had a low effective atomic number (Z eff ≈ 8.8) close to that of biological tissue (Z eff = 7.4), therefore this material can be studied for its dosimetric properties.In the present study, LiMgBO 3 doped with Dy was synthesized using the solution combustion method with different starting materials than reported previously. The synthesized samples were irradiated with a γ‐ray dose and their luminescence properties were studied using photoluminescence (PL) and electron paramagnetic resonance (EPR) techniques.…”

Section: Introductionsupporting

confidence: 62%

“…Photoluminescence properties of LMB:Eu and LMB:Eu,Bi have also been studied in detail. LiMgBO 3 :Dy 3+ in its polycrystalline form has been prepared using a novel solution combustion method and its TL sensitivity was found to be half compared with commercial TLD‐100 and showed a high degree of fading of 30% after 20 days. Furthermore, LiMgBO 3 :Dy 3+ in its nanocrystalline form has been prepared using the combustion method and its structural and optical properties have been studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Yerpude

Chopra²,

Dhoble³

et al. 2019

Luminescence

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LiMgBO 3 :Dy 3+ , a low Z eff material was prepared using the solution combustion method and its luminescence properties were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermoluminescence (TL), photoluminescence (PL), Fourier transform infrared spectroscopy, and electron paramagnetic resonance (EPR) techniques. Reitvield refinement was also performed for the structural studies.The PL emission spectra for LiMgBO 3 :Dy 3+ consisted of two peaks at 478 due to the 4 F 9/2 → 6 H 15/2 magnetic dipole transition and at 572 nm due to the hypersensitive 4 F 9/2 → 6 H 13/2 electric dipole transition of Dy 3+ , respectively. A TL study was carried out for both the γ-ray-irradiated sample and the C 5+ irradiated samples and was found to show high sensitivity for both. Moreover the γ-ray-irradiated LiMgBO 3 :Dy 3+ sample showed linearity in the dose range 10 Gy to 1 kGy and C 5+ -irradiated samples show linearity in the fluence range 2 × 10 10 to 1 × 10 11 ions/cm 2 . In the present study, the initial rise method, various heating rate method, the whole glow curve method, glow curve convolution deconvolution function, and Chen's peak shape method were used to calculate kinetic parameters to understand the TL glow curve mechanism in detail. Finally, an EPR study was performed to examine the radicals responsible for the TL process. KEYWORDS ESR, LiMgBO 3 , tissue equivalent material, trapping parameters | INTRODUCTIONBoron-based materials show interesting thermoluminescence (TL) properties when exposed to ionizing radiation [1,2] . The luminescence properties of lithium borate and magnesium borate in both microcrystalline and nanocrystalline forms have been studied previously [1][2][3][4] . Recently, researchers who studied lithium magnesium borate phosphor found that it was useful for applications in dosimetry [5,6] .To date, only a few studies on LiMgBO 3 have been reported [5] .Recently, the TL properties of rare earth ion (RE = Tb, Gd, Dy, Pr, Mn, Ce, Eu)-doped lithium magnesium borate (LMB), prepared using the solid state diffusion method, have been documented [6] . LMB:Tb 3+ showed the best results with a stable TL peak at 240°C. LMB:Tb 3+ was about four times more sensitive than TLD-100. Optical properties of LMB glasses doped with Dy 3+ ,Sm 3+ ions have been studied [7] .Photoluminescence properties of LMB:Eu and LMB:Eu,Bi have also been studied in detail [8] . LiMgBO 3 :Dy 3+ in its polycrystalline form has been prepared using a novel solution combustion method and its TL sensitivity was found to be half compared with commercial TLD-100 and showed a high degree of fading of 30% after 20 days [9] . Furthermore, LiMgBO 3 :Dy 3+ in its nanocrystalline form has been prepared using the combustion method and its structural and optical properties have been studied [10] .

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“…The effective atomic number of LiMgBO 3 was calculated using the formula:

Z_{eff} = \sqrt[2.94]{f_{1} \times {(Z_{1})}^{2.94} + f_{2} \times {(Z_{2})}^{2.94} + f_{3} \times {(Z_{3})}^{2.94} + f_{4} \times {(Z_{4})}^{2.94}}

Section: Introductionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Yerpude

Chopra²,

Dhoble³

et al. 2019

Luminescence

View full text Add to dashboard Cite

show abstract

“…56 In the present work, MgF 2 doped with different concentrations 57 of Eu has been prepared by using a newly reported syringe method. 58 The thoughtful approach of using this method is the hazardous [8,9]. Also this temperature range is low enough such that the 115 interference due to black body radiation signal is negligible.…”

mentioning

confidence: 99%

WITHDRAWN: Syringe method synthesis and characterization of MgF2:Eu

Bajaj

Omanwar

2014

Results in Physics

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“…The NaMgBO 3 :Dy 3+ and NaMgBO 3 :Sm 3+ phosphors are prepared by well-established solution combustion synthesis method (Bhatkar et al 2002;Thakare et al 2007;Bhatkar et al 2007;Sonekar et al 2007;Sonekar et al 2009;Bajaj and Omanwar 2014;Wu et al 2005). During the reaction, the stoichiometric amounts of high purity starting components, NaNO 3 (G.R.…”

Section: Methodsmentioning

confidence: 99%

“…Combustion synthesis is a good low-cost, one-step, and lowtemperature method for the synthesis of borates, phosphates, and silicates (Khan et al 2015;Bhatkar et al 2002;Thakare et al 2007;Bhatkar et al 2007;Sonekar et al 2007;Sonekar et al 2009). Some orthoborates, LiMgBO 3 :Dy 3+ (Bajaj and Omanwar 2014), NaCaBO3 (Wu et al 2005) (Kumar et al 2013), NaCaBO 3 : Ce 3+ , Mn 2+ (Sun et al 2013), NaCaBO 3 :Ce 3+ , Tb 3+ , Mn 2+ (Zhang and Gong 2014), NaCaBO 3 :Sm 3+ (Bedyal et al 2014), etc., have been synthesized with different methods to explore their crystal structure and luminescent properties for probable applications in medical as well as industrial fields. Recently, Wu et al (2007) effectively synthesized NaMgBO 3 by solid-state reaction and explained the structure of NaMgBO 3 which is somewhat similar to that of NaSrBO 3 orthoborates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Khan

Ingale

Omanwar

2015

Environ Sci Pollut Res

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Rare earth (Dy(3+) and Sm(3+))-doped sodium magnesium borate (NaMgBO3) is synthesized by solution combustion synthesis method keeping their thermoluminescence properties in mind. The reaction produced very stable crystalline NaMgBO3:RE (RE = Dy(3+), Sm(3+)) phosphors. The phosphors are exposed to (60)Co gamma-ray radiations dose of varying rate from 5 to 25 Gy, and their TL characteristics with kinetic parameters are studied. NaMgBO3:Dy(3+) phosphor shows two peaks for lower doping concentration of Dy(3+) while it reduced to single peak for the higher concentrations of activator Dy(3+). NaMgBO3:Dy(3+) shows the major glow peak around 200 °C while NaMgBO3:Sm(3+) phosphors show two well-separated glow peaks at 200 and 332 °C respectively. The thermoluminescence intensity of these phosphors was compare with the commercially available TLD-100 (Harshaw) phosphor. The TL responses for gamma-ray radiations dose were found to be linear from 5 to 25 Gy for both phosphors while the fading in each case is calculated for the tenure of 45 days.

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Advances in synthesis and characterization of LiMgBO3:Dy3+

Cited by 24 publications

References 21 publications

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

WITHDRAWN: Syringe method synthesis and characterization of MgF2:Eu

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

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Advances in synthesis and characterization of LiMgBO3:Dy3+

Cited by 24 publications

References 21 publications

Luminescence study of LiMgBO3:Dy for γ‐ray and carbon ion beam exposure

Luminescence study of LiMgBO3:Dy for γ‐ray and carbon ion beam exposure

WITHDRAWN: Syringe method synthesis and characterization of MgF2:Eu

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

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Product

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Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure