Influence of P ion on Sr 2 B 5 O 9 Cl:Eu for TL dosimetry

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

doi:10.1016/j.nimb.2014.12.003

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…For the given phosphor with increase of γ‐ray irradiation TL peak is shifted around 10 °C on higher temperature side as high energy traps are formed and these are released at higher thermal energy . For Ba 3 Si 6 O 12 N 2 :Eu increase in radiation doses increases TL intensity which indicate that a large number of charge carriers are taking part in trapping, retrapping and recombination processes and thus resulted in different peak intensities for different doses . From Fig.…”

Section: Resultsmentioning

confidence: 89%

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Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

Fartode

Dhoble

2015

Luminescence

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Eu(2+)-doped Ba3Si6O12N2 phosphors were prepared successfully via a modified solid-state diffusion method. The phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence measurements. These phosphors were effectively excited at 355 nm and an intense emission peaking in the range 480 nm to 525 nm in the blue region was observed. The optimized dopant concentration was determined to be 1 mol% of Eu(2+) ion. The colour coordinates for phosphor were found to be (0.196, 0.326) in the blue region. This phosphor may find application for near-ultraviolet (NUV) excited lamp phosphors. The thermoluminescence study shows the complex glow curve. Trapping parameters (activation energy and frequency factor) were calculated for individual deconvoluted peaks by Chen's peak shape method, the initial rise method and the whole glow peak method.

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Section: Resultsmentioning

confidence: 89%

“…For a sample to be used in radiation dosimetry, their TL should be stable and should not fade upon storage after irradiation to ionizing radiations . For this study the sample was stored for a few days without taking any care to shield it from humidity and light.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

Fartode

Dhoble

2015

Luminescence

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“…The intensity of glow peak increases as the radiation dose rate increases, which indicates that more traps responsible for these glow peaks were occupied with the increase in dose rate. When thermal stimulation takes place, these traps release the charge carriers and recombine with their counterparts resulting in an increase in the TL intensity (39). Figure 16 shows the linear increase in the TL intensity up to 5 kGy, after which it reaches saturation as the dose rate increases.…”

Section: Linearity and Fadingmentioning

confidence: 99%

New UVA‐emitting BaAlBO₃F₂:Eu²⁺ phosphor with PL and TL properties for phototherapy lamp

Kunghatkar

Dhoble

Hemne³

2016

Luminescence

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We present a new phosphor material, BaAlBO F doped with Eu ions, having emission in the UVA region. The phosphor material is prepared by a simple wet chemical method. Phase confirmation was carried out using the Rietveld refinement program which shows that BaAlBO F :Eu has an hexagonal crystal system. Using a Fourier transform infrared spectroscopy graph, we studied the bond stretching present in the phosphor material. Photoluminescence (PL) characterization, carried out using a RF spectrofluorophotometer, shows two types of PL excitation and emission. Before reduction, emission is in the blue region at 431 nm; after reduction, excitation is at 258 nm and emission is at 361 nm, which is in the UVA region. Some thermoluminescence (TL) studies were carried out in this material for the first time, for example, determination of the trapping parameters, linearity, fading, glow curve convolution and deconvolution (GCCD) function for curve fitting and the T -T method for confirmation of the trapped centers in the TL glow peak. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore, borates activated with rare earth ions can also show emission in the visible spectral region and are controllable by doping with concentrations of rare earth and the alkaline-earth metal compositions. [4][5][6][7][8][9][10][11][12][13][14][15][16][17] Magnesium borate activated with Dy was reported by Kazanskaya et al as a promising material in this respect. Magnesium borate (MgB 4 O 7 :Dy) phosphor is a nearly tissue-equivalent material with an effective atomic number equal to 8.4 compared with 7.4 for water and soft biological tissues, so it is commonly used for medical dosimetry of ionizing radiation such as γ-rays and X-rays using the TL technique.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and thermoluminescence in Dy³⁺‐, Ce³⁺‐, and Tb³⁺‐activated MgB₄O₇ phosphor for dosimetry application

et al. 2022

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Samples of microcrystalline rare earth-doped magnesium borate materials were synthesized via modified solid-state diffusion and were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Photoluminescence (PL) results for the MgB 4 O 7 :Dy sample depicts blue emission that resulted from a 4 F 9/2 -6 H 15/2 transition that peaked at 484 nm, which was much stronger than the yellow emission arising due to the 4 F 9/2 -6 H 13/2 transition at 576 nm. From the emission spectra for MgB 4 O 7 :Tb, it seems that at higher concentrations of Tb 3+ ion, the green emission becomes strong and directly relates to the energy transfer from the 5 D 3 excited state to the 5 D 4 excited state through a cross-relaxation, whereas the blue emission is suppressed in MgB 4 O 7 phosphors. The thermoluminescence (TL) of the samples was measured immediately after irradiation and compared by TL curve with CaSO 4 :Dy. MgB 4 O 7 :Dy showed very good TL sensitivity for the desirable dosimetric curve at $218 C and the best glow curve structure. In comparison with the dosimetric peaks for MgB 4 O 7 :Ce and MgB 4 O 7 :Tb, the MgB 4 O 7 :Dy phosphor is equally sensitive to CaSO 4 :Dy. MgB 4 O 7 :Dy and MgB 4 O 7 :Tb showed linearity for a 1-5 kGy dose. The activation energies and frequency factors were also calculated for samples MgB 4 O 7 :RE (where RE = Dy, Tb, Ce) using the peak shape method.

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Influence of P ion on Sr 2 B 5 O 9 Cl:Eu for TL dosimetry

Cited by 9 publications

References 22 publications

Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

New UVA‐emitting BaAlBO₃F₂:Eu²⁺ phosphor with PL and TL properties for phototherapy lamp

Photoluminescence and thermoluminescence in Dy³⁺‐, Ce³⁺‐, and Tb³⁺‐activated MgB₄O₇ phosphor for dosimetry application

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Influence of P ion on Sr 2 B 5 O 9 Cl:Eu for TL dosimetry

Cited by 9 publications

References 22 publications

Synthesis and characterization of Ba3Si6O12N2:Eu2+ phosphor

Synthesis and characterization of Ba3Si6O12N2:Eu2+ phosphor

New UVA‐emitting BaAlBO3F2:Eu2+ phosphor with PL and TL properties for phototherapy lamp

Photoluminescence and thermoluminescence in Dy3+‐, Ce3+‐, and Tb3+‐activated MgB4O7 phosphor for dosimetry application

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Product

Resources

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Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

Synthesis and characterization of Ba₃Si₆O₁₂N₂:Eu²⁺ phosphor

New UVA‐emitting BaAlBO₃F₂:Eu²⁺ phosphor with PL and TL properties for phototherapy lamp

Photoluminescence and thermoluminescence in Dy³⁺‐, Ce³⁺‐, and Tb³⁺‐activated MgB₄O₇ phosphor for dosimetry application