Luminescence study of Dy or Ce activated LiCaBO<sub>3</sub> phosphor for γ‐ray and C<sup>5+</sup> ion beam irradiation

Oza, Abha H.; Dhoble, N.S.; Lochab, S.P.; Dhoble, S.J.

doi:10.1002/bio.2846

Cited by 12 publications

(10 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PL emission spectra of Dy 3+ ‐doped LiMgBO 3 sample excited at 349 nm wavelength is shown in Figure (b). The emission spectra consisted of two peaks centred at 478 nm and 572 nm that were due to the 4 F 9/2 → 6 H 15/2 magnetic dipole transition and the hypersensitive 4 F 9/2 → 6 H 13/2 electric dipole transitions, respectively of Dy 3+ . Furthermore, the inset in Figure (b) shows that emission intensity increased with increase in Dy 3+ concentration and did not show any concentration quenching until the 1 mol% concentration.…”

Section: Resultsmentioning

confidence: 94%

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

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] .

show abstract

Section: Resultsmentioning

confidence: 94%

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

“…Recently, Kore et al (12) reported CaMg 3 (SO 4 ) 4 :Dy 3+ phosphor for carbon ion dosimetry, which shows 3.5 times more sensitivity than commercial CaSO 4 :Dy Thermoluminescent dosimeter (TLD) phosphor. Other researchers have also reported the use of phosphor in carbon ion dosimetry (13,14). Ce 3+ -activated LiCaAlF 6 is a well-known phosphor with diverse applications in solid-state tunable lasers and scintillators (15)(16)(17)(18)(19).…”

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Comparison of thermoluminescence characteristics in γ‐ray and C⁵⁺ ion beam‐irradiated LiCaAlF₆:Ce phosphor

Yerpude

Dhoble²,

Lochab

et al. 2016

Luminescence

Self Cite

View full text Add to dashboard Cite

We compare the thermoluminescence (TL) behavior of Ce(3+) ion-activated LiCaAlF6 exposed to γ-rays and a carbon ion beam. The reported phosphor is synthesized using an in-house precipitation method with varying concentrations of activator ion and is characterized by X-ray diffraction (XRD) and TL. Rietveld refinement is performed to study the structural statistics. The TL glow curve consists of a prominent glow peak at 232°C with three shoulders at 115, 159 and 333°C when exposed to γ-rays from a (60) Co source. When exposed to a C(5+) ion beam, the TL glow curve consists of five peaks with peak temperatures near 156, 221, 250, 287 and 330°C, and is found to vary slightly with changing fluence. Glow curve convolution deconvolution (GCCD) functions are applied to the TL curves for complete analysis of the glow curve structure and TL traps. The order of kinetics (b), activation energy (E) and frequency factor are determined using Chen's peak shape method and theoretical curves are drawn using GCCD functions. A track interaction model (TIM) is used to explain the sublinearity/saturation at higher fluences. Ion beam parameters are analyzed using Monte-Carlo simulation-based SRIM-2013 code. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

“…Numerous applications of radiation in wide areas have motivated towards the development of radiation dosimetric materials according to the area of interest. Several luminescence based detectors (TLDs) were developed for the detection of radiation as well as quality control in radiation processing, and many novel dosimetric materials are still being researched . However, the saturation of TL response at high dose (above 1 kGy) of irradiation is a major concern for TL detectors like LiF:Mg,Cu,P, MgB 4 O 7 :Dy and CaSO 4 :Dy .…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of nanocrystalline Mg₂P₂O₇:Eu phosphor

et al. 2018

View full text Add to dashboard Cite

Thermoluminescence (TL) measurements were carried out on europium (Eu) doped magnesium pyrophosphate (Mg P O ) nanopowders using gamma irradiation in the dose range of 0.1 to 3 kGy. The powder samples were successfully synthesized by chemical co-precipitation synthesis route. The formation and crystallinity of the compound was confirmed by powder X-ray diffraction (PXRD) pattern. The estimated particle size was found to be in nanometer scale by using Debye Scherer's formula. A scanning electron microscopy (SEM) study was carried out for the morphological characteristics of as synthesized Mg P O :Eu phosphor. Photoluminescence (PL) study was carried out to confirm the presence of the rare-earth ion and its valence state. The TL analysis of synthesized samples were performed after the irradiation of Mg P O :Eu with cobalt-60 ( Co) gamma rays. The high and low intensity peaks of TL glow curve appeared at around 400 K, 450 K, 500 K and 596 K respectively. The appreciable shift in peak positions has been observed for different concentrations of Eu ion. The trapping parameters, namely activation energy (E), order of kinetics (b) and frequency factor (s) have been determined using thermal cleaning process, peak shape (Chen's) method and glow curve deconvolution (GCD) functions.

show abstract

Luminescence study of Dy or Ce activated LiCaBO₃ phosphor for γ‐ray and C⁵⁺ ion beam irradiation

Cited by 12 publications

References 20 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

Comparison of thermoluminescence characteristics in γ‐ray and C⁵⁺ ion beam‐irradiated LiCaAlF₆:Ce phosphor

Luminescence properties of nanocrystalline Mg₂P₂O₇:Eu phosphor

Contact Info

Product

Resources

About

Luminescence study of Dy or Ce activated LiCaBO3 phosphor for γ‐ray and C5+ ion beam irradiation

Cited by 12 publications

References 20 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

Comparison of thermoluminescence characteristics in γ‐ray and C5+ ion beam‐irradiated LiCaAlF6:Ce phosphor

Luminescence properties of nanocrystalline Mg2P2O7:Eu phosphor

Contact Info

Product

Resources

About

Luminescence study of Dy or Ce activated LiCaBO₃ phosphor for γ‐ray and C⁵⁺ ion beam irradiation

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

Comparison of thermoluminescence characteristics in γ‐ray and C⁵⁺ ion beam‐irradiated LiCaAlF₆:Ce phosphor

Luminescence properties of nanocrystalline Mg₂P₂O₇:Eu phosphor