Synthesis of Eu3+ doped Gd2O3–HfO2 nanopowder for radiation detection

Ji-yang, Chen; Shi, Ying; Feng, Tao; Shi, Jianlin

doi:10.1016/j.jallcom.2004.07.075

Cited by 10 publications

(9 citation statements)

References 13 publications

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“…Compositions of AB 2 O 4 (A = Sr, Zn, Ca; B = Ga, In, Y) doped mostly with Mn 2+ , Cr 3+ , Eu 3+ , Tb 3+ , Eu 3+ or other rare earth ions can be mentioned, see e.g. [72,73] and references therein. Ternary sulfides are also frequently researched due to their lower energy gap with respect to oxides and thus the possibility of getting higher overall conversion efficiency.…”

Section: Powdersmentioning

confidence: 99%

Scintillation detectors for x-rays

Nikl

2006

Meas. Sci. Technol.

750

301

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Recent research in the field of phosphor and scintillator materials and related detectors is reviewed. After a historical introduction the fundamental issues are explained regarding the interaction of x-ray radiation with a solid state. Crucial parameters and characteristics important for the performance of these materials in applications, including the employed measurement methods, are described. Extended description of the materials currently in use or under intense study is given. Scintillation detector configurations are further briefly overviewed and selected applications are mentioned in more detail to provide an illustration.

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Section: Powdersmentioning

confidence: 99%

Scintillation detectors for x-rays

Nikl

2006

Meas. Sci. Technol.

750

301

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“…The blue emission in HfO 2 :Tb and HfO 2 :Eu nanotubes can also be attributed to the presence of defect states in HfO 2 . The green emission arises from the inner 4 f shell transitions of Tb 3+ ions, 27,28 and the red emission originates from the inner 4 f shell transitions of corresponding Eu 3+ ions incorporated inside the HfO 2 host matrix 29,30 . These RE 3+ emissions can be efficiently excited via the fundamental absorption of HfO 2 2,4 .…”

Section: Resultsmentioning

confidence: 99%

“…The green emission arises from the inner 4f shell transitions of Tb 31 ions, 27,28 and the red emission originates from the inner 4f shell transitions of corresponding Eu 31 ions incorporated inside the HfO 2 host matrix. 29,30 These RE 31 emissions can be efficiently excited via the fundamental absorption of HfO 2 . 2,4 In the PL spectrum of HfO 2 :Tb nanotubes, the four characteristic peaks centered at 492, 548, 590, and 624 nm can be assigned to the 5 D 4 -7 F 6 , 5 D 4 -7 F 5 , 5 D 4 -7 F 4 , and 5 D 4 -7 F 3 transitions of Tb 31 ions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and White Light Emission of Rare Earth‐Doped HfO₂ Nanotubes

Liu

Wang

et al. 2011

Journal of the American Ceramic Society

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Luminescent nanotubes based on rare earth (RE) (Eu, Tb)‐doped hafnia (HfO2) were prepared by radio frequency (RF) sputtering with electrospun polyvinylpyrolidone (PVP) nanofibers as templates. The nanotubes annealed at 500°C have a uniform structure with desired tubular morphologies. Various colors of photoluminescence (PL) could be easily obtained by tuning the concentrations of the RE ions in the HfO2 host. The Eu‐ and Tb‐codoped HfO2 (HfO2:Eu&Tb) nanotubes exhibited white light emissions under a 325 nm excitation. Good Commission International de I'Eclairage (CIE) coordinates (0.333, 0.323) and color temperature (Tc) (5465 K) were achieved in the HfO2:Eu&Tb nanotubes. Experimental evidence showed that the presence of blue emission originates from the defect states in HfO2 nanotubes, the green and the red emissions can be attributed to the inner 4f shell transitions of corresponding Tb3+ ions and Eu3+ ions in HfO2 shells, respectively. Compared with RE‐doped HfO2 films, the nanotube samples showed intense white light emissions, revealing that the HfO2:Eu&Tb nanotubes are an efficient white light‐emission material.

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“…Among them, scintillation ceramic is one of the most important types with high light yield, low afterglow, good chemical stability, and low cost. Scintillation ceramics, such as Gd 2 O 2 S: Pr, (Y,Gd) 2 O 3 : Eu, Gd 3 Ga 5 O 12 : Cr, have been developed for many years and used successfully in commercial X‐ray computed tomography (X‐CT) . Ceramic scintillators based on the composition Gd 2 O 2 S: Pr, Ce, F show an afterglow of 0.00005% after 4 ms, which is therefore the best detector material now available using in X‐CT.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gd₂O₂S: Pr, Ce, F Scintillation Ceramics by Pressureless Sintering in Nitrogen Atmosphere

Wang

Kou

et al. 2015

Int J Applied Ceramic Tech

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Gd 2 O 2 S: Pr, Ce, F ceramics with good scintillation properties were fabricated by pressureless sintering in nitrogen atmosphere. The effects of annealing temperature on the intensity of X-ray excited luminescence and light output were investigated. The light output strongly depends on the thickness of Gd 2 O 2 S: Pr, Ce, F ceramics. Thermoluminescence properties of the samples were studied after X-ray irradiation in the temperature range of 77-438 K.

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Synthesis of Eu3+ doped Gd2O3–HfO2 nanopowder for radiation detection

Cited by 10 publications

References 13 publications

Scintillation detectors for x-rays

Scintillation detectors for x-rays

Synthesis and White Light Emission of Rare Earth‐Doped HfO₂ Nanotubes

Fabrication of Gd₂O₂S: Pr, Ce, F Scintillation Ceramics by Pressureless Sintering in Nitrogen Atmosphere

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Synthesis of Eu3+ doped Gd2O3–HfO2 nanopowder for radiation detection

Cited by 10 publications

References 13 publications

Scintillation detectors for x-rays

Scintillation detectors for x-rays

Synthesis and White Light Emission of Rare Earth‐Doped HfO2 Nanotubes

Fabrication of Gd2O2S: Pr, Ce, F Scintillation Ceramics by Pressureless Sintering in Nitrogen Atmosphere

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Product

Resources

About

Synthesis and White Light Emission of Rare Earth‐Doped HfO₂ Nanotubes

Fabrication of Gd₂O₂S: Pr, Ce, F Scintillation Ceramics by Pressureless Sintering in Nitrogen Atmosphere