TL and EPR studies of CaSO4:Dy phosphor to investigate its efficacy in measurement of food irradiation dose at sub-ambient temperatures

Sanyal, Bhaskar; Natarajan, V.; Chawla, S.P.; Sharma, Arun

doi:10.1016/j.radmeas.2010.06.006

Cited by 36 publications

(14 citation statements)

References 18 publications

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“…Further, the TL results of the present work are compared with reported TL dosimetric properties of CaSO 4 :Dy 3+ (TLD-900). TLD-900 exhibits glow peak at high temperature (~494 K) with a weak shoulder at 415 K [52,53]. Y 2 O 3 exhibit a well resolved prominent TL glow peak at 383 K and weak one at 570 K. 383 K shows relatively high intensity, good stability and responds to γ-doses.…”

Section: Fadingmentioning

confidence: 99%

“…Y 2 O 3 exhibit a well resolved prominent TL glow peak at 383 K and weak one at 570 K. 383 K shows relatively high intensity, good stability and responds to γ-doses. Further, Y 2 O 3 shows the linearity in the γ-dose range 0.1-2.0 kGy where as CaSO 4 :Dy 3+ shows the linearity in the dose range 0.5-1.0 kGy [52]. However, a detailed investigation needs to be carried out on Y 2 O 3 for its suitability in radiation dosimetry.…”

Section: Fadingmentioning

confidence: 99%

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Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Nanocrystalline Y 2 O 3 is synthesized by solution combustion technique using urea and glycine as fuels. X-ray diffraction (XRD) pattern of as prepared sample shows amorphous nature while annealed samples show cubic nature. The average crystallite size is calculated using Scherrer's formula and is found to be in the range 14-30 nm for samples synthesized using urea and 15-20 nm for samples synthesized using glycine respectively. Field emission scanning electron microscopy (FE-SEM) image of 1173 K annealed Y 2 O 3 samples show well separated spherical shape particles and the average particle size is found to be in the range 28-35 nm. Fourier transformed infrared (FTIR) and Raman spectroscopy reveals a stretching of Y-O bond. Electron spin resonance (ESR) shows V − center, O 2 − and Y 2+ defects. A broad photoluminescence (PL) emission with peak at~386 nm is observed when the sample is excited with 252 nm. Thermoluminescence (TL) properties of γ-irradiated Y 2 O 3 nanopowder are studied at a heating rate of 5 K s −1 . The samples prepared by using urea show a prominent and well resolved peak at~383 K and a weak one at~570 K. It is also found that TL glow peak intensity (I m1 ) at~383 K increases with increase in γ-dose up to~6.0 kGy and then decreases with increase in dose. However, glycine used Y 2 O 3 shows a prominent TL glow with peaks at 396 K and 590 K. Among the fuels, urea used Y 2 O 3 shows simple and well resolved TL glows. This might be due to fuel and hence particle size effect. The kinetic parameters are calculated by Chen's glow curve peak shape method and results are discussed in detail.

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Section: Fadingmentioning

confidence: 99%

Section: Fadingmentioning

confidence: 99%

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The dose response of thermally stimulated luminescence from phosphors has been reported in literature for use in radiation processing applications. Sanyal, Natarajan, Chawla, and Sharma () showed that the pre‐irradiation thermal treatments of CaSO4:Dy made the phosphor suitable to measure absorbed dose in the range of 0.5–5 kGy with improved linear response. Majority of the TL phosphors exhibit either supra or sublinear dose responses in the dose range applicable for the radiation processing of food and can be considered as a suitable dosimeter if response can be reproduced with standard mathematical relation (ISO/ASTM 51956:(E)).…”

Section: Resultsmentioning

confidence: 99%

Dosimetric characterization of LiMgPO₄:Tb,B phosphor for its application in food irradiation

Menon

Singh

Kadam

et al. 2019

J Food Process Preserv

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Optically stimulated luminescence (OSL) intensity versus dose response of indigenously developed LiMgPO4:Tb,B (LMP) disks is linear in the range of 1 mGy–1 kGy. Currently, no other synthetic OSL phosphor is available, which covers such a large dose range. In order to assess the feasibility of using the phosphor in low‐dose food irradiation dosimetry (up to 1 kGy), dosimetric characterization of LMP‐based OSL dosimeter was carried out under both, gamma and electron beam irradiation. The doses estimated by LMP and routine dosimeters match well in the field trials. Hence, this phosphor has the potential to be used in phytosanitary application using radiation, where delivered doses are of the order of 0.01–1 kGy. Practical applications Food irradiation dosimetry, in India, is being carried out using chemical dosimeters such as Fricke, Ceric‐cerous sulphate, and Alanine‐electron paramagnetic resonance. The former two are liquid dosimeters kept in glass tubes and therefore need to be handled delicately during irradiation. The complex chemical preparation, sensitive to environmental conditions (temperature, humidity, etc.) and temperature changes, sensitive to UV radiation and the high sensitivity to impurities make these dosimetry systems inconvenient for routine applications. The OSL intensity versus dose response of indigenously developed LiMgPO4:Tb,B (LMP) has been observed to be linear up to 1 kGy. Apart from good dosimetric qualities, other qualities of the dosimeter system are quick readout, ease of handling, automated readout mechanisms, and integrity in harsh environments. The above‐discussed attributes make LMP‐based OSL dosimeter a potential candidate to carry out dosimetry during phytosanitary application of radiation in low‐dose range (0.01–1 kGy). This range includes irradiation of mangoes, onions, potatoes, etc.

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“…29 Most of the reports on dosimetric aspects of the solid-state systems in the literature discuss lower dose response within 1 kGy. In the case of thermally modified commercial CaSO 4 :Dy polycrystalline phosphor, a linear response has been reported in the dose range of 3-4 kGy.…”

Section: Methodsmentioning

confidence: 99%

Thermoluminescence features of alumina‐mixed borophosphate glasses with Tb³⁺ ions for dosimetric applications

Kalpana

Sanyal

Gandhi³

et al. 2016

Int J of Appl Glass Sci

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Amorphous barium borophosphate materials doped with small quantity of terbium ions and with the addition of some amounts of alumina were prepared. Thermoluminescence (TL) characteristics of these glasses were investigated after irradiating them with different doses of γ‐rays (in the range 0.5‐8.0 kGy). The TL emission exhibited a dosimetric peak at about 210°C. The TL output under this glow peak is observed to increase with the γ‐ray dose. For any fixed γ‐ray dose, the TL output is increased with increase in Al2O3 content up to 3.0 mol%, and beyond this concentration, quenching of TL is visualized. The dose response of TL output of these glasses exhibited linear behavior in the dose range 0.5‐4.0 kGy. The mechanisms responsible for TL emission and the variation of TL output with the concentration of Al2O3 are quantitatively discussed in terms of structural defects induced during γ‐ray irradiation. Finally, it is concluded that these glasses are potential materials for dosimetry applications in the dose range 0.5‐4.0 kGy.

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TL and EPR studies of CaSO4:Dy phosphor to investigate its efficacy in measurement of food irradiation dose at sub-ambient temperatures

Cited by 36 publications

References 18 publications

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Dosimetric characterization of LiMgPO₄:Tb,B phosphor for its application in food irradiation

Thermoluminescence features of alumina‐mixed borophosphate glasses with Tb³⁺ ions for dosimetric applications

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TL and EPR studies of CaSO4:Dy phosphor to investigate its efficacy in measurement of food irradiation dose at sub-ambient temperatures

Cited by 36 publications

References 18 publications

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Dosimetric characterization of LiMgPO4:Tb,B phosphor for its application in food irradiation

Thermoluminescence features of alumina‐mixed borophosphate glasses with Tb3+ ions for dosimetric applications

Contact Info

Product

Resources

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Dosimetric characterization of LiMgPO₄:Tb,B phosphor for its application in food irradiation

Thermoluminescence features of alumina‐mixed borophosphate glasses with Tb³⁺ ions for dosimetric applications