A study of the fractionation dose on the radiation response of Harwell Red-Perspex PMMA dosimeter

Hosni, F.; Farah, K.; Mejri, A.; Khayat, Alain; Chtourou, R.; Hamzaoui, A.H.

doi:10.1016/j.nimb.2012.08.022

Cited by 12 publications

(5 citation statements)

References 11 publications

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“…Finally, the radiocatalytic activity of the synthesized samples was evaluated through the degradation of methylene blue (MB) in aqueous solution under gamma-ray irradiation at doses varying from 10 to 1500 Gy using the Tunisian Cobalt-60 radiation facility at a 80Gy/min dose rate [38,39]. This dose rate was determined by alanine dosimeters irradiated by the facility and returned to Aerial for dose rate assessment.…”

Section: Methodsmentioning

confidence: 99%

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Samet

March

Stéphan

et al. 2018

Journal of Alloys and Compounds

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We report on an experimental study aimed at optimizing the radiocatalytic properties of pure and copper-incorporated TiO 2 powders. This has been achieved by conducting crosschecked structural, optical and radiocatalytic studies. Structural and nanoscale analyses show evidence of internal doping by Cu 2+ in the TiO 2 lattice that leads to the reduction of the optical band gap down to 1.5 eV. The effect of gamma radiation on the radiocatalytic activity of these catalysts was studied by degradation of methylene blue as a model pollutant. It was found that the addition of Cu-doped TiO 2 (anatase) powders improves significantly the pollutant degradation, as compared to photocatalysis. The doping and the annealing temperature's impact on the structural, optical and radiocatalytic efficiencies are highlighted and correlated.

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Section: Methodsmentioning

confidence: 99%

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Samet

March

Stéphan

et al. 2018

Journal of Alloys and Compounds

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“…The applied irradiation doses were 14, 28, and 60 kGy with a dose rate of 80 Gy/min, corresponding respectively to 2h55mn, 5h50mn, 12h30mn time of irradiation. This dose rate was determined by alanine dosimeters irradiated by the facility and returned to aerial for dose rate assessment [30,31]. hour in darkness to reach adsorption equilibrium.…”

Section: Catalysts Preparationmentioning

confidence: 99%

Effect of gamma radiation on the photocatalytic properties of Cu doped titania nanoparticles

Samet

March

Brun

et al. 2018

Materials Research Bulletin

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The aim of this paper is to study the effect of gamma-rays on structural, physicochemical, optical and photocatalytic performance of TiO 2 nanoparticles doped with different concentrations of copper ranging from 0 to 6 at.%. The powders have been prepared by sol-gel technique and annealed at 400 °C. They were irradiated by gamma-rays with doses varying from 14 to 60 KGy. These investigations confirm the formation of anatase TiO 2 nanoparticles and Cu 2+ ion substitution for Ti 4+ sites within the TiO 2 structure. This study also shows that, once the TiO 2 structure is saturated with copper, a metallic copper segregation is formed at the crystallite surfaces. After gamma irradiation, samples present a crystalline core and a disordered shell structure as a result of the formation of oxygen vacancies. Such oxygen vacancies at the TiO 2 nanocrystal surface lead to a remarkable enhancement of the photocatalytic activity of Cu-doped TiO 2 catalysts.

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“…Consequently, the products receive their target dose in several stages and the absorbed dose measured can be influenced by the fractionation dose effects. It is therefore important that the effect of fractionation dose should be studied for good dosimetric accuracy (Hosni et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…It is therefore important that the effect of fractionation dose should be studied for good dosimetric accuracy (Hosni et al, 2012).…”

Section: Dose Fractionation Effectmentioning

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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A study of the fractionation dose on the radiation response of Harwell Red-Perspex PMMA dosimeter

Cited by 12 publications

References 11 publications

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Effect of gamma radiation on the photocatalytic properties of Cu doped titania nanoparticles

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

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A study of the fractionation dose on the radiation response of Harwell Red-Perspex PMMA dosimeter

Cited by 12 publications

References 11 publications

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Effect of gamma radiation on the photocatalytic properties of Cu doped titania nanoparticles

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

Contact Info

Product

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