A5069808739- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Atomic and Subatomic Physics Research
- Nuclear materials and radiation effects
- Medical Imaging Techniques and Applications
- Crystal Structures and Properties
- Terahertz technology and applications
- Nuclear Physics and Applications
- Semiconductor Quantum Structures and Devices
- Advanced Semiconductor Detectors and Materials
- Solid-state spectroscopy and crystallography
- Radioactive contamination and transfer
- Semiconductor Lasers and Optical Devices
- Quantum Dots Synthesis And Properties
- Particle Detector Development and Performance
- Nanowire Synthesis and Applications
- X-ray Diffraction in Crystallography
- Solid State Laser Technologies
- Advanced X-ray and CT Imaging
- Air Quality and Health Impacts
- Crystallography and Radiation Phenomena
- RNA Interference and Gene Delivery
- Cholinesterase and Neurodegenerative Diseases
- Fullerene Chemistry and Applications
- Menopause: Health Impacts and Treatments
Shanghai Institute of Ceramics
2015-2025
Chinese Academy of Sciences
2015-2025
University of Chinese Academy of Sciences
2020-2024
Taiyuan University of Technology
2024
Shanghai University
2024
Fudan University
2009-2020
Huashan Hospital
2009-2020
Soochow University
2014
First Affiliated Hospital of Soochow University
2014
University of California, San Diego
2011
In this paper, we investigate the temperature dependence of luminescence characteristics highly efficient cerium-doped scintillator, lutetium-yttrium orthosilicate Lu2(1−x)Y2xSiO5:Ce3+. The photoluminescence excitation and emission spectra have been measured in a broad range. Ce1 Ce2 decay times shows onset time decrease at about 300 K. This observation demonstrates that unlike so far reported, center is not substantially quenched until room temperature. 5d1 excited-state ionization both...
Simultaneous improvement in afterglow, light yield and energy resolution CsI:Tl-based scintillators paves the way to its application computer tomography high-speed imaging.
Single-crystal lutetium yttrium oxyorthosilicate doped by cerium (LYSO:Ce) has been widely adopted as a scintillator material for radiation detection. The demands from nuclear medical imaging, well high-energy physics, are calling ever-increasing scintillation properties. Here, Al3+ codoping of LYSO:Ce is realized the first time, and series LYSO:Ce,xAl (x = 0, 0.3, 0.6, 1.0 atom %) crystals successfully grown micro-pulling down (μ-PD) method. It found that at x 0.6 %, overall properties...
The development of scintillation materials often requires significant efforts in defect engineering. A quick screening approach the possible dopant elements is urgently needed. Lu 2 SiO 5 (LSO) a material with wide applications nuclear medicine, public security, and high‐energy physics. Ca doping Al have been demonstrated to enhance properties Ce‐doped LSO. To further carry out such an approach, it expected use first‐principles calculations assist Unfortunately, direct calculation formation...
Abstract Aims To investigate the association between parity and risk of incident dementia in women. Methods We pooled baseline follow-up data for community-dwelling women aged 60 or older from six population-based, prospective cohort studies four European two Asian countries. investigated using Cox proportional hazards regression models adjusted age, educational level, hypertension, diabetes mellitus cohort, with additional analysis by subtype (Alzheimer (AD) non-Alzheimer (NAD)). Results Of...
Cerium-doped yttrium oxyorthosilicate (YSO:Ce) scintillation crystals are widely used in mixed radiation field detection, radioactive isotope monitoring, and other fields due to their excellent properties low cost. However, the poor coincidence time resolution severely limits further promotion. In order resolve this problem, work first designed conducted research on Ni2+-codoped YSO:Ce crystals, a series of YSO:Ce,xNi (x = 0, 0.3, 0.6, 1.5 atom %) were grown using Czochralski method. It is...
Cerium-doped lutetium pyrosilicate Lu2Si2O7:Ce3+ (LPS:Ce) single crystal samples grown via Czochralski method were annealed under air and H2 atmospheres from 350to1600°C. The x-ray excited luminescence spectra UV as well thermal stimulated measured. It was found that the efficiency after annealing in at 1400°C significantly enhanced compared to unannealed samples. This phenomenon suggested be caused by existence of some oxygen vacancies LPS:Ce crystals, these can effectively eliminated means...
Cerium-doped lutetium oxyorthosilicate Lu <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> SiO xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> :Ce crystal is a well-known scintillator with an excellent figure-of-merit. In this paper, air annealing was used to further improve its scintillation properties. The samples cut from Czochralski grown crystals were annealed in atmosphere at 1400°C for 10 h. Based on the analysis of difference...
To improve particle detectors in physics research and PET scanners medicine, for example, better scintillators are sought. In this study, researchers succeed creating a ceramic that is free of defect-induced host luminescence. combined ``defect engineering'' ``band-gap approach, the detrimental influence lattice defects significantly reduced, by simultaneously lowering concentration point shifting their energy levels. Thanks to efficient scintillator material with high density, light yield,...
Lu0.8Sc0.2BO3:Ce powders doped with different forms of cerium [CeF3, CeO2 or Ce(NO3)3] were synthesized by solid-state methods under conditions (carbon powders, nitrogen air) and studied a combination X-ray excited luminescence spectra, optical diffuse reflectance fluorescence decay curves absorption near edge spectroscopy. The spectra confirmed the Ce3+/Ce4+ ratios in samples interest. Based on Ce LIII-edge XANES we finally concluded that differences scintillation intensities interest...
Large‐sized Gd 3 Al 2.3 Ga 2.7 O 12 :Ce single crystals are grown by the Czochralski method. The distribution of and at octahedral (oct‐, 6‐oxygen‐coordinated) tetrahedral (tet‐, 4‐oxygen‐coordinated) sites in crystal is studied. Rietveld refinement used to analyze site occupation Ga. results show that ions with a larger radius than prefer occupy more compact sites. Density functional theory calculations energy for ion lower 5 crystal, whereas case opposite. Slater rules estimate effective...
Gd3(Al,Ga)5O12:Ce (GAGG:Ce) crystal is considered as one of the most efficient scintillators for nuclear medicine imaging devices and γ detection applications due to its high light yield (58,000 ph./MeV), excellent energy resolution (4.9%@662 keV), density (6.63 g/cm3). With introduction time-of-flight techniques, are required have a faster scintillation decay time higher yield. An strategy accelerating process GAGG:Ce mainly through codoping low valence ions such Ca2+. However, mechanism...