Luminescence properties of Na3LuSi3O9:Ce3+ as a potential scintillator material

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102477-102480 ◽  
Author(s):  
Jianbang Zhou ◽  
Fengjuan Pan ◽  
Jiuping Zhong ◽  
Hongbin Liang ◽  
Qiang Su ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Luminescence Spectra ◽  
X Ray ◽  
Scintillator Material ◽  
Excited Luminescence

Comparison between the X-ray excited luminescence spectra of the Bi4Ge3O12 (BGO) and Na3Lu0.99Ce0.01Si3O9 powders.

Europium-doped Zn-Al-LDH intercalated with 4-biphenylcarboxylate anion and undoped Zn-Al-LDH intercalated with its anionic Eu(III) complex: Structural and UV or X-ray excited luminescence properties

2022 ◽  
Vol 124 ◽  
pp. 111703
Author(s):  
João Henrique Saska Romero ◽  
Gustavo Pereira Saito ◽  
Flávia Cagnin ◽  
Marco Aurélio Cebim ◽  
Marian Rosaly Davolos
Keyword(s):  
Luminescence Properties ◽  
X Ray ◽  
Complex Structural ◽  
Excited Luminescence

scholarly journals Unusual x-ray excited luminescence spectra of NiO suggest self-trapping of thed-dcharge-transfer exciton

2012 ◽  
Vol 86 (11) ◽  
Author(s):  
V. I. Sokolov ◽  
V. A. Pustovarov ◽  
V. N. Churmanov ◽  
V. Yu. Ivanov ◽  
N. B. Gruzdev ◽  
...  
Keyword(s):  
Luminescence Spectra ◽  
X Ray ◽  
Self Trapping ◽  
Excited Luminescence

Activation of Lead Fluoride Room Temperature Luminescence by Structural Modifications

1994 ◽  
Vol 348 ◽  
Author(s):  
D.L. Alov ◽  
A.V. Bazhenov ◽  
V.K. Egorov ◽  
G.A. Emelchenko ◽  
N.V. Klassen ◽  
...  
Keyword(s):  
Room Temperature ◽  
Structural Characteristics ◽  
Structural Defects ◽  
Luminescence Spectra ◽  
Lead Fluoride ◽  
Light Emitting ◽  
X Ray ◽  
Structural Modifications ◽  
Excited Luminescence ◽  
Room Temperature Luminescence

ABSTRACTThe connection of lead fluoride luminescence properties with its structural characteristics has been studied. Single crystals of the cubic and orthorombic phases, cubic and orthorombic powders, pressure compacted orthorombic ceramics, plastically deformed crystals were used. The photo- and X-ray excited luminescence spectra have been investigated. The experimental results have shown that the room temperature luminescence of lead fluoride can be accounted for local light emitting centers which are produced by the intrinsic structural defects in the orthorombic lead fluoride.

Effects of lutetium doping on the X-ray-excited luminescence properties of the tungstate Zn1−x Lu x WO4

2016 ◽  
Vol 43 (2) ◽  
pp. 885-899
Author(s):  
H. Ait Ahsaine ◽  
M. Zbair ◽  
M. Ezahri ◽  
A. Benlhachemi ◽  
B. Bakiz ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
X Ray ◽  
Excited Luminescence

scholarly journals X-Ray Excited Luminescence Spectroscopy and Imaging with NaGdF4:Eu and Tb

2020 ◽  
Author(s):  
Meenakshi Ranasinghe ◽  
Md Arifuzzaman ◽  
Apeksha C. Rajamanthrilage ◽  
Ashley Dickey ◽  
Joseph W. Kolis ◽  
...  
Keyword(s):  
High Temperature ◽  
Mri Contrast Agents ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Mri Contrast ◽  
X Ray ◽  
Optical Luminescence ◽  
Light Generation ◽  
Excited Luminescence ◽  
Hydrothermal Methods

<p>X-ray scintillating NaGdF<sub>4</sub>: Eu and Tb nanophosphors were synthesized via co-precipitate and hydrothermal methods, encapsulated with silica, functionalized with biotin, and characterized by X-ray excited optical luminescence spectroscopy and imaging. The nanophosphors synthesized by co-precipitate method were ~90 and ~106 nm in size, respectively; nanophosphors synthesized by hydrothermal method showed the highest luminescence intensity. Further, we investigated the effect of thermal annealing/calcination on the X-ray excited luminescence spectra and intensity. We observed, at high-temperature, NaGdF<sub>4</sub>: Eu@SiO<sub>2</sub> converts to NaGd<sub>9</sub>Si<sub>6</sub>O<sub>26</sub>: Eu which is also an X-ray scintillator. The particles generate light through tissue and can be selectively excited using a focused X-ray source for imaging and light generation applications. The particles also act as MRI contrast agents for multi-modal localization. </p>

scholarly journals X-Ray Excited Luminescence Spectroscopy and Imaging with NaGdF4:Eu and Tb

2020 ◽  
Author(s):  
Meenakshi Ranasinghe ◽  
Md Arifuzzaman ◽  
Apeksha C. Rajamanthrilage ◽  
Ashley Dickey ◽  
Joseph W. Kolis ◽  
...  
Keyword(s):  
High Temperature ◽  
Mri Contrast Agents ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Mri Contrast ◽  
X Ray ◽  
Optical Luminescence ◽  
Light Generation ◽  
Excited Luminescence ◽  
Hydrothermal Methods

<p>X-ray scintillating NaGdF<sub>4</sub>: Eu and Tb nanophosphors were synthesized via co-precipitate and hydrothermal methods, encapsulated with silica, functionalized with biotin, and characterized by X-ray excited optical luminescence spectroscopy and imaging. The nanophosphors synthesized by co-precipitate method were ~90 and ~106 nm in size, respectively; nanophosphors synthesized by hydrothermal method showed the highest luminescence intensity. Further, we investigated the effect of thermal annealing/calcination on the X-ray excited luminescence spectra and intensity. We observed, at high-temperature, NaGdF<sub>4</sub>: Eu@SiO<sub>2</sub> converts to NaGd<sub>9</sub>Si<sub>6</sub>O<sub>26</sub>: Eu which is also an X-ray scintillator. The particles generate light through tissue and can be selectively excited using a focused X-ray source for imaging and light generation applications. The particles also act as MRI contrast agents for multi-modal localization. </p>

Resonant Excitation Spectroscopy of Light-Emitting Silicon Nanostructures

1997 ◽  
Vol 486 ◽  
Author(s):  
Yoshihiko Kanemitsu ◽  
Shinji Okamoto
Keyword(s):  
Quantum Wells ◽  
Electronic Structures ◽  
Resonant Excitation ◽  
Luminescence Properties ◽  
Luminescence Spectra ◽  
Light Emitting ◽  
Si Nanocrystals ◽  
Crystalline Nature ◽  
Si Nanostructures ◽  
Excited Luminescence

AbstractWe have studied optical properties and electronic structures of zero-dimensional (OD) Si nanocrystals and two-dimensional (2D) Si quantum wells by means of resonant excitation spectroscopy. Resonantly excited luminescence spectra of 0D Si nanocrystals are sensitive to the surface structure. The size dependence of the photoluminescence (PL) properties and resonantly excited PL spectra of SiO2-capped Si nanocrystals indicate that excitons are localized at the interface between the c-Si and SiO2 surface layer. The TO-phonon related structure in resonantly excited luminescence is clearly observed in H-passivated Si nanocrystals. Hpassivated Si nanocrystals show their crystalline nature, while the oxidized Si nanocrystals show their disordered nature. Luminescence properties of Si/SiO2 nanocrystals are similar to those of Si/SiO2 quantum wells. The electronic structures and luminescence properties of Si nanostructures are discussed.

scholarly journals New Ca2.90(Me2+)0.10(PO4)2 β-tricalcium Phosphates with Me2+ = Mn, Ni, Cu: Synthesis, Crystal-Chemistry, and Luminescence Properties

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 288 ◽  
Author(s):  
Angela Altomare ◽  
Rosanna Rizzi ◽  
Manuela Rossi ◽  
Asmaa El Khouri ◽  
Mohammed Elaatmani ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Rietveld Method ◽  
Unit Cell ◽  
Luminescence Properties ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tricalcium Phosphates

C a 2.90 M e 0.10 2 + ( P O 4 ) 2 (with Me = Mn, Ni, Cu) β-tricalcium phosphate (TCP) powders were synthesized by solid-state reaction at T = 1200 °C and investigated by means of a combination of scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, and luminescence spectroscopy. SEM morphological analysis showed the run products to consist of sub spherical microcrystalline aggregates, while EDS semi-quantitative analysis confirmed the nominal Ca/Me composition. The unit cell and the space group were determined by X-ray powder diffraction data showing that all the compounds crystallize in the rhombohedral R3c whitlockite-type structure, with the following unit cell constants: a = b = 10.41014(19) Å, c = 37.2984(13) Å, and cell volume V = 3500.53(15) Å3 (Mn); a = b = 10.39447(10) Å, c = 37.2901(8) Å; V = 3489.22(9) Å3 (Ni); a = b = 10.40764(8) Å, c = 37.3158(6) Å, V = 3500.48(7) Å3 (Cu). The investigation was completed with the structural refinement by the Rietveld method. The FTIR spectra are similar to those of the end-member Ca β-tricalcium phosphate (TCP), in agreement with the structure determination, and show minor band shifts of the (PO4) modes with the increasing size of the replacing Me2+ cation. Luminescence spectra and decay curves revealed significant luminescence properties for Mn and Cu phases.

Crystal structure and luminescence properties of a novel promising phosphor Ba3ScB9O18

2007 ◽  
Vol 22 (4) ◽  
pp. 328-333 ◽  
Author(s):  
Gemei Cai ◽  
Ming He ◽  
X. L. Chen ◽  
W. Y. Wang ◽  
Y. F. Lou ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Emission Band ◽  
Light Yield ◽  
Green Emission ◽  
Structural Features ◽  
Luminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Green Emission Band ◽  
Excited Luminescence

A novel borate compound Ba3ScB9O18 has been synthesized by solid-state reaction and its structure has been determined and refined from powder X-ray diffraction data. This compound crystallizes in a hexagonal cell (space group P63/m) with lattice parameters a=7.1360(4) Å and c=16.5420(9) Å, and each unit cell contains two formulas. Its crystal structure is made up of planar B3O6 groups parallel to each other along the [001] direction, regular ScO6 octahedra, irregular BaO6 hexagons, and BaO9 polyhedra to form an analogue structure of Ba3YB9O18. DTA and TGA curves for Ba3ScB9O18 show that it is a chemically stable and congruent melting compound. Luminescence properties for Ba3ScB9O18 were investigated using fluorescence spectroscopy and X-ray excited luminescence measurements. Its emission spectrum upon UV excitation (330 nm) has exhibited a prominent blue-green emission band at about 490 nm, and its XEL spectra show an intense emission band in the range of 360 to 500 nm with peak center at 400 nm. The light yield of Ba3ScB9O18 powders is about 23% as large as that of BGO powders under the same measurement conditions. There seems to be a certain relationship between the scintillation properties and the structural features of Ba3ScB9O18.

Syntheses and X-ray excited luminescence properties of Ba3BP3O12 , BaBPO5 and Ba3BPO7

2006 ◽  
Vol 117 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Cheng-Jun Duan ◽  
Wei-Feng Li ◽  
Xue-Yan Wu ◽  
Hao-Hong Chen ◽  
Xin-Xin Yang ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
X Ray ◽  
Excited Luminescence
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