Synthesis and scintillation properties of nano Gd2O3(Eu) scintillator for high resolution X-ray imaging applications

Cha, Bokyung; Lee, Seungjun; Muralidharan, P.; Kim, Jong-Yul; Kim, Do Kyung; Lee, Dong-Hyoung; Yun, Jong-Il; Cho, Gyuseong

doi:10.1016/j.nima.2009.10.171

Cited by 18 publications

(4 citation statements)

References 5 publications

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“…Figure 1a shows that the optical transmittance of the samples as a function of wavelength decrease with increasing scintillator filler content, as increasing filler concentration leads to light dispersion and decreased optical transparency of the films. The main emission peak of the Gd2O3:Eu 3+ is observed at ≈ 611 nm and is related to the red emission transition of Eu 3+ under X-ray radiation [15,22]. Figure 2b shows the optical transmittance as a function of Gd2O3:Eu 3+ content, at a wavelength of 611nm.…”

Section: Resultsmentioning

confidence: 99%

“…Traditional indirect X-ray detectors are limited by the scintillators critical properties such as efficiency, response time, light yield, surface roughness and for large area applications, low flexibility and cost [13,14]. Flexible nanocomposites have been prepared for the development of indirect radiation detectors by dispersing scintillating nanoparticles within a polymer matrix [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Stretchable scintillator composites for indirect X-ray detectors

Oliveira

Correia

Francesko

et al. 2018

Composites Part B: Engineering

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Flexible and stretchable materials are increasingly being investigated for future technological platforms, polymer based materials being the most suitable candidates for those emerging technologies. This work reports on polymer based scintillator composites based on the thermoplastic elastomer Styrene-Ethylene/Butadiene-Styrene (SEBS) and Gd2O3:Eu 3+ scintillator nanoparticles, to form a polymer-based flexible and stretchable material for X-ray indirect detectors. Further, visible light yield under X-ray irradiation was improved by the inclusion of 2,5 dipheniloxazol (PPO) and (1,4-bis (2-(5-phenioxazolil))-benzol (POPOP) within the polymer matrix. Together with high levels of stretchability, with deformations up to 100%, the films exhibit suitable performance with low mechanical hysteresis (less than 1.5 MJ/m 3 for cycles up to 100% of strain) and reproducibly such as a scintillator material for the conversion of X-ray radiation into visible radiation. The decrease of just ~13% of the X-ray radiation into visible light upon stretching up to 100% is attributed to a reduction of the effective filler concentration and proves the suitability of the developed materials for large area and stretchable X-ray radiation detectors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stretchable scintillator composites for indirect X-ray detectors

Oliveira

Correia

Francesko

et al. 2018

Composites Part B: Engineering

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show abstract

“…Furthermore, a Czerny-Turner spectrometer and intensified charge coupled device camera as well as Nd:YAG laser with 266nm excitation were used for photo-luminescence (PL) and decay time measurement. A relative light output of all fabricated samples was measured using a lens-coupled CCD camera (Andor DV-434) and X-ray source (LISTEM, BRS-2) with 4.3mm spot size and inherent 0.8mm Al filter [4].…”

Section: Methodsmentioning

confidence: 99%

“…It has been reported that the scintillator with nanocrystalline and submicron-sized powder unlike conventional screen with micro-crystalline phosphor shows somewhat different optical, structural properties in luminescence and image resolution, and so on. In this work, Lu 2 O 3 :Eu scintillators with nano particles were synthesized by using simple precipitation process, and their scintillation characteristics were investigated as a function of various calcination temperature of the synthesized powder in heat-treatment [3,4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and scintillation characterization of nanocrystalline Lu₂O₃(Eu) powder for high-resolution X-ray imaging detectors

K.¹,

Yong²,

Lee³

et al. 2012

J. Inst.

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Lu 2 O 3 :Eu(C Eu :5mol%) powder scintillators with nanocrystalline structures were successfully synthesized via a precipitation method and subsequent calcination treatment as a conversion material for X-ray imaging detectors. In this work, a homogeneous precipitation process was carried out using DEA(diethanolamine) as a precipitant to prepare nanocrystalline Eu-doped Gd 2 O 3 powders. The microstructures, crystal structure and scintillation properties such as luminescent spectra, decay time and light intensity were measured as a function of calcination temperature in heat-treatment of the synthesized powder. The sample prepared at 1200 ˚C calcination temperature showed the highest light intensity. And the scintillator showed a strong red emission light at near 611nm under photo-and X-ray luminescence for its potential X-ray imaging detector applications. KEYWORDS: X-ray detectors; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators); Scintillators and scintillating fibres and light guides; X-ray radiography and digital radiography (DR)

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Self‐Assembled Colloidal Photonic Structures for Directional Radioluminescence of Gd and Ta Oxide Scintillators

Strassberg,

Nakanishi,

Shamaev

et al. 2024

Advanced Optical Materials

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Radiation detection is being revolutionized by integrating photonic elements into scintillators. In this study, a scalable and cost‐effective method is proposed to achieve tuneable emission enhancement across the visible spectrum by colloidal self‐assembly of photonic crystals on scintillator surfaces. This concept is demonstrated for Eu3+/Tb3+‐doped Gd and Ta oxides. Widely available and affordable colloidal nanospheres of SiO2 or polymethyl methacrylate are self‐assembled on these scintillators. The size of the nanospheres is carefully optimized to match the desired emission lines of Eu3+/Tb3+. The result is homogeneous and closely‐packed structures with clear photonic bandgap in the visible range. Under X‐ray excitation, the scintillators covered with the photonic layers exhibit enhanced light extraction in the direction perpendicular to the surface, compared to isotropic emission in the bare scintillator. Such scintillation directionality, when optically matched with a proper detector, will result in higher efficiency of the overall detection system. Moreover, X‐ray imaging demonstrates an enhancement of 25% in system resolution of the scintillator supplemented with the photonic layer compared to unmodified scintillators. The proposed method is scintillator‐ and nanosphere‐agnostic, thus offering a promising versatile approach for directing the scintillation light toward a photodetector and increasing detection system performance, including high‐resolution imaging applications.

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Synthesis and scintillation properties of nano Gd2O3(Eu) scintillator for high resolution X-ray imaging applications

Cited by 18 publications

References 5 publications

Stretchable scintillator composites for indirect X-ray detectors

Stretchable scintillator composites for indirect X-ray detectors

Synthesis and scintillation characterization of nanocrystalline Lu₂O₃(Eu) powder for high-resolution X-ray imaging detectors

Self‐Assembled Colloidal Photonic Structures for Directional Radioluminescence of Gd and Ta Oxide Scintillators

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Synthesis and scintillation properties of nano Gd2O3(Eu) scintillator for high resolution X-ray imaging applications

Cited by 18 publications

References 5 publications

Stretchable scintillator composites for indirect X-ray detectors

Stretchable scintillator composites for indirect X-ray detectors

Synthesis and scintillation characterization of nanocrystalline Lu2O3(Eu) powder for high-resolution X-ray imaging detectors

Self‐Assembled Colloidal Photonic Structures for Directional Radioluminescence of Gd and Ta Oxide Scintillators

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Synthesis and scintillation characterization of nanocrystalline Lu₂O₃(Eu) powder for high-resolution X-ray imaging detectors