Development of glass-ceramic scintillators for gamma-ray astronomy

Faoite, Daithí de; Hanlon, L.; Roberts, O. J.; Ulyanov, A.; McBreen, S.; Tobin, Isaac; Stanton, Kenneth T.

doi:10.1088/1742-6596/620/1/012002

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…Photoresponsive materials that transform highly energetic radiation into UV/vis photons easily detectable by conventional detectors are important for various applications such as high-energy physics, 1 medical imaging, 2 and nuclear industry. 3 The most important features of such materials are the efficiency of energy conversion, the luminescence decay time, the density, and the physical and chemical stabilities. 4 Whatever their nature, the currently used systems are limited by intrinsic drawbacks.…”

Section: ■ Introductionmentioning

confidence: 99%

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs

et al. 2019

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The design of high-performance energy-converting materials is an essential step for the development of sensors but the elaboration of the bulk materials currently used remains costly and difficult. Therefore, a different approach based on the self-assembly of nanoparticles has been explored. We report on the preparation by solvothermal synthesis of highly crystalline CeF 3 nanodiscs. Their surface modification by bisphosphonate ligands led to stable, highly concentrated, colloidal suspensions in water. Despite the low aspect ratio of the nanodiscs (~ 6), a liquid-crystalline nematic phase spontaneously appeared in these colloidal suspensions. Thanks to the paramagnetic character of the nanodiscs, the nematic phase was easily aligned by a weak (0.5 T) magnetic field, which provides a simple and convenient way of orienting all the nanodiscs in suspension in the same direction. Moreover, the more dilute, isotropic, suspensions displayed strong (electric and magnetic) field-induced orientation of the nanodiscs (Kerr and Cotton-Mouton effects), with fast enough response times to make them suitable for use in electro-optic devices. Furthermore, emission study showed a direct relation between fluorescence intensity and magnetic field induced orientation of the colloids. Finally, with their fast radiative recombination decay rates, the nanodiscs show luminescence properties that compare quite favourably with those of bulk CeF 3 . Therefore, these CeF 3 nanodiscs are very promising building blocks for the development and processing of photosensitive materials for sensor applications.

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Section: ■ Introductionmentioning

confidence: 99%

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs

et al. 2019

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“…The simultaneous occurrence of several types of RE-containing crystallites may take place during thermal treatments. In some cases their presence is detrimental because they lower glass transparency if their size exceeds few tens of nanometers [20]; moreover RE can be incorporated in a non-luminescent valence state (e.g. Ce 4+ , Tb 4+ ).…”

Section: Introductionmentioning

confidence: 99%

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Tratsiak

Korjik

Fedorov

et al. 2018

Journal of Alloys and Compounds

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Binary alkali-earth silicate glasses doped with Ce 3+ , Tb 3+ , and Dy 3+ were obtained by meltquenching technique and their photo-and radio-luminescence properties were investigated. The disordered structure of the glass is responsible for an inhomogeneous broadening of the electronic radiative 5d 1 energy level of Ce 3+ due to their localization in several positions with different surroundings, possessing a slightly different local ligand field. The influence of glass matrix composition on the Stokes shift as a function of ionic radius of the cation was shown. The radioluminescence spectral shapes were related to the simultaneous occurrence of emissions from all Ce 3+ configurations with relative weights proportional to their abundance in the glasses. The possibility of excitation of Ce 3+ in different localizations was demonstrated and confirmed by the systematic shift of emission from excitation. On the contrary, no shift was observed in the Tb 3+ and Dy 3+ doped glasses, thanks to the lower effect of ligand field on their radiative electronic levels.

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“…Галогениды металлов являются перспективными люминесцентными материалами, широко применяющимися в различных областях (от светодиодов до сцинтилляционных детекторов) [1][2][3]. Среди них иодиды щелочноземельных элементов, активированные ионами Eu 2+ , вызывают интерес благодаря относительно низкой стоимости, высокому световыходу (до 120 000 фотонов/МэВ) и оптимальному энергетическому разрешению (до 3 % при 662 кэВ).…”

Section: Introductionunclassified

Luminescent materials in the form of glass ceramic

Salamakha¹,

Трусова²,

Tratsiak³

2020

Journal of the Belarusian State University. Chemistry

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In this paper an original method for obtaining glass ceramic samples based on iodides of alkaline-earth elements activated by Eu2+ is proposed, their structural and spectral-luminescent properties are studied. The formation of glass ceramic samples containing both anhydrous iodides of alkaline-earth elements and crystalline hydrates of iodides of alkaline-earth element is confirmed by X-ray diffraction analysis when using in the synthesis process from 30 to 60 wt .% BaI2 : Eu2+, from 40 to 50 wt. % SrI2 : Eu2+ and 40 wt. % CaI2 : Eu2+. The possibility of adjusting the resulting color of glass ceramic samples emission (from blue to purple-red) by varying its composition is shown.

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Development of glass-ceramic scintillators for gamma-ray astronomy

Cited by 14 publications

References 23 publications

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Luminescent materials in the form of glass ceramic

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Development of glass-ceramic scintillators for gamma-ray astronomy

Cited by 14 publications

References 23 publications

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF3 Nanodiscs

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF3 Nanodiscs

Luminescent properties of binary MO-2SiO2 (M = Ca2+, Sr2+, Ba2+) glasses doped with Ce3+, Tb3+ and Dy3+

Luminescent materials in the form of glass ceramic

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Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs

Liquid-Crystalline Suspensions of Photosensitive Paramagnetic CeF₃ Nanodiscs