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Lattice Anchoring Stabilizesα-FAPbI3 Perovskite for High-Performance X-Ray Detectors 认领 引用 被引量：3
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作者 Yu-Hua Huang Su-Yan Zou +5 位作者 Cong-Yi Sheng Yu-Chuang Fang Xu-Dong Wang Wei Wei Wen-Guang Li Dai-Bin Kuang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期337-354,共18页
Formamidinium lead iodide(FAPbI3)perovskite exhibits an impressive X-ray absorption coefficient and a large carrier mobility-lifetime product(μτ),making it as a highly promising candidate for X-ray detection appl... Formamidinium lead iodide(FAPbI3)perovskite exhibits an impressive X-ray absorption coefficient and a large carrier mobility-lifetime product(μτ),making it as a highly promising candidate for X-ray detection application.However,the presence of larger FA+cation induces to an expansion of the Pb-I octahedral framework,which unfortunately affects both the stability and charge carrier mobility of the corresponding devices.To address this challenge,we develop a novel low-dimensional(HtrzT)PbI3 perovskite featuring a conjugated organic cation(1H-1,2,4-Triazole-3-thiol,HtrzT+)which matches well with theα-FAPbI3 lattices in two-dimensional plane.Benefiting from the matched lattice between(HtrzT)PbI3 andα-FAPbI3,the anchored lattice enhances the Pb-I bond strength and effectively mitigates the inherent tensile strain of theα-FAPbI3 crystal lattice.The X-ray detector based on(HtrzT)PbI3(1.0)/FAPbI3 device achieves a remarkable sensitivity up to 1.83×105μC Gyair−1 cm−2,along with a low detection limit of 27.6 nGyair s−1,attributed to the release of residual stress,and the enhancement in carrier mobility-lifetime product.Furthermore,the detector exhibits outstanding stability under X-ray irradiation with tolerating doses equivalent to nearly 1.17×106 chest imaging doses. 展开更多
关键词 α-FAPbI3perovskite Conjugated organic cation Lattice anchoring Phase stability X-ray detectors
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Effect of measurement reduction on synthetic aperture x-ray ghost imaging 认领 引用
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作者 Haipeng Zhang Jie Tang +4 位作者 Nixi Zhao Changzhe Zhao Jianwen Wu Zhongliang Li Tiqiao Xiao 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期457-465,共9页
The unique advantage of x-ray ghost imaging(XGI)is its potential in low dose radiology.One of the practical ways to reduce the radiation exposure is to reduce the measurements while remaining sufficient image quality.... The unique advantage of x-ray ghost imaging(XGI)is its potential in low dose radiology.One of the practical ways to reduce the radiation exposure is to reduce the measurements while remaining sufficient image quality.Synthetic aperture x-ray ghost imaging(SAXGI)is invented to achieve megapixel XGI with limited measurements,which is expected to implement XGI simultaneously with large field of view and low radiation exposure.In this paper,we experimentally investigate the effect of measurements reduction on the spatial resolution and image quality of SAXGI with standard sample and biomedical specimen.The results with a resolution chart demonstrated that at 360 measurements,SAXGI successfully retrieved the sample image of 1960×1960 pixels with spatial resolution of 4μm.With measurement reduction,the spatial resolution deteriorates but the sparser structures are still discernable.Even with measurements reduced to 10,a spatial resolution of 10μm can still be achieved by SAXGI.A biomedical sample of a fish specimen is employed to evaluate the method and the fish image of 2000×1000 pixels with an SSIM of 0.962 is reconstructed by SAXGI with 770measurements,corresponding to an accumulative exposure reduction of more than 2 times.With the measurements reduced to 10 which corresponds to 1/160 of the accumulative radiation exposure for conventional radiology,bulky structure like the fish skeleton can still be definitely discerned and the SSIM for the reconstructed image still retained 0.9179.Results of this paper demonstrate that measurements reduction is practicable for the radiation exposure reduction of the sample,which implicates that SAXGI with limited measurements is an efficient solution for low dose radiology. 展开更多
关键词 x-ray ghost imaging synthetic aperture x-ray imaging low dose radiology compressed sensing algorithm
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Tracing equatorward and poleward boundaries of the magnetospheric cusp from a simulated X-ray image 认领 引用
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作者 Xue Wang TianRan Sun +4 位作者 C.Philippe Escoubet Andy Read YiHong Guo Steve Sembay Chi Wang 《Earth and Planetary Physics》 EI CSCD 2026年第1期144-155,共12页
A large-scale view of the magnetospheric cusp is expected to be obtained by the Soft X-ray Imager(SXI)onboard the Solar wind Magnetosphere Ionosphere Link Explorer(SMILE).However,it is challenging to trace the three-d... A large-scale view of the magnetospheric cusp is expected to be obtained by the Soft X-ray Imager(SXI)onboard the Solar wind Magnetosphere Ionosphere Link Explorer(SMILE).However,it is challenging to trace the three-dimensional cusp boundary from a two-dimensional X-ray image because the detected X-ray signals will be integrated along the line of sight.In this work,a global magnetohydrodynamic code was used to simulate the X-ray images and photon count images,assuming an interplanetary magnetic field with a pure Bz component.The assumption of an elliptic cusp boundary at a given altitude was used to trace the equatorward and poleward boundaries of the cusp from a simulated X-ray image.The average discrepancy was less than 0.1 RE.To reduce the influence of instrument effects and cosmic X-ray backgrounds,image denoising was considered before applying the method above to SXI photon count images.The cusp boundaries were reasonably reconstructed from the noisy X-ray image. 展开更多
关键词 SMILE mission X-ray image cusp boundary
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Highly resistive lead-free perovskite ferroelectric enables self-driven X-ray detection with ultralow dose 认领 引用
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作者 Huawei Yang Jianbo Wu +11 位作者 Zeng-Kui Zhu Hang Li Panpan Yu Ying Zeng Qingran Ding Guirong Chen Lijun Xu Zhangtong Han Haiqing Zhong Yueying Wang Wenhui Wu Junhua Luo 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期746-751,共6页
Lead-free perovskite has become a shining pearl in the field of direct X-ray detection due to its nontoxicity and excellent optoelectronic properties.However,the high limit of detection(LoD)of X-ray detectors due to h... Lead-free perovskite has become a shining pearl in the field of direct X-ray detection due to its nontoxicity and excellent optoelectronic properties.However,the high limit of detection(LoD)of X-ray detectors due to high current noise caused by high operating voltages is a major challenge to overcome.Here,we utilized a zero-dimensional lead-free perovskite ferroelectric material(NMP)3Sb2Br9(1,NMP=Nmethylpyrrolidine)to achieve ultra-low Lo D self-driven X-ray detection.The self-driven detection mode without external bias has been proven to be an effective means of reducing Lo D due to its low current noise characteristics.Additionally,the zero-dimensional distinctive isolated framework results in a high resistivity of 1.39×1011Ωcm,which effectively reduces the current noise and suppresses ion migration.By further combining the ferroelectric-induced bulk photovoltaic effect,the 1-based detector achieves an ultra-low Lo D X-ray detection of 84.1 n Gyair/s under the self-driven mode,which represents a quite advanced level in the lead-free perovskite X-ray detection region.Our work successfully achieved ultra-low Lo D self-driven X-ray detection by combining ferroelectricity with high resistance,providing a promising avenue for the development of low Lo D X-ray detectors. 展开更多
关键词 Zero-dimensional perovskite Lead-free Ferroelectric Self-driven X-ray detection Low limit of detection
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Triplet exciton harvesting via TADF in hafnium chlorides array scintillator screen enables ultrahigh-resolution X-ray imaging 认领 引用
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作者 Jun'an Lai Yi Ye +9 位作者 Xu Liu Sijun Cao Shiji Zhou Wenxia Zhang Kang An Peng He Tingming Jiang Xiaosheng Tang Rui Zhou Dong Zhang 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第6期82-96,共15页
Indirect X-ray imaging is an indispensable non-destructive testing technology in the medical and industrial fields.However,its quality is restricted by the light output and optical crosstalk of the scintillation scree... Indirect X-ray imaging is an indispensable non-destructive testing technology in the medical and industrial fields.However,its quality is restricted by the light output and optical crosstalk of the scintillation screens.Herein,we report a series of hafnium-based organic-inorganic metal halides(OIMHs)with regulated organic cation chain lengths.The thermally activated delayed fluorescence(TADF)is demonstrated in these materials by their anti-thermal quenching luminescence characteristics,fitting of temperature-dependent photoluminescence decay lifetime,and a series of theoretical calculations.These represent non-luminescent triplet excitons that can be emitted by reverse intersystem crossing(RISC),thus improving the utilization rate of excitons and increasing the light output of scintillators.The highest performance of our reported hafnium-based OIMHS shows a light yield of 56563.31±1250 photons/MeV and detection limit of 23.86 nGyair/s.Moreover,the optical crosstalk is suppressed by developing silicon array scintillation screens,and an ultra-high spatial resolution of 31.41 lp/mm is achieved.These results offer insights into the luminescent mechanism of hafnium-based OIMHs and initiate a new paradigm for exciton-optical co-management for high-quality X-ray imaging. 展开更多
关键词 X-ray imaging metal halide scintillator thermally activated delayed fluorescence light management
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Physics-informed neural network for material identification via distortion-robust polychromatic x-ray attenuation correction in photon-counting detectors 认领 引用
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作者 Xin Yan Jie Zhang +5 位作者 Kai He Yiheng Liu Yuetong Zhao Gang Wang Xinlong Chang Youwei Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期396-405,共10页
Spectral distortions in photon-counting detectors(PCDs)fundamentally limit the quantitative accuracy of material identification.While machine learning is used for compensation,current data-driven methods often lack ph... Spectral distortions in photon-counting detectors(PCDs)fundamentally limit the quantitative accuracy of material identification.While machine learning is used for compensation,current data-driven methods often lack physical constraints,limiting their interpretability and reliability across varying conditions.To address this issue,we propose a physics-informed neural network(PINN)framework that explicitly embeds the Beer-Lambert law into the learning architecture.By integrating an explicit differential layer to extract high-order curvature features from distorted spectra,the model enables direct inference of the effective atomic number and areal density.This approach effectively leverages the Z-dependent non-linear profile of the photoelectric effect,even when explicit absorption edges are outside the primary detection window.Simulation results establish a high-precision benchmark for Zeffestimation in the target low-Z range(613),with an RMSE of 0.2111.Experimental validation on a CdZnTe-PCD further demonstrates that this accuracy improvement is preserved under realistic pulse pile-up and noise conditions,achieving an RMSE of 0.2457 and an R2of 0.9670.Compared with conventional physical correction methods(typically±0.5 error margin),the proposed framework provides improved precision,with 92.86%of Zeffestimation errors falling within±0.4,corresponding to an approximately 20%tighter error bound.These results confirm that the proposed framework effectively mitigates spectral distortion,providing a robust,calibration-free solution for precise material identification of low-Z materials in industrial non-destructive testing. 展开更多
关键词 physics-informed neural networks (PINNs) photon-counting detectors (PCDs) material identification x-ray imaging
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X-ray pulsar-based airborne clock error estimation using Gaussian process 认领 引用
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作者 Yusong WANG Yidi WANG +4 位作者 Kun JIANG Wenhai JIAO Minzhang SONG Liansheng LI Wei ZHENG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第4期541-550,共10页
In order to autonomously calibrate the airborne clocks of deep space explorers,this paper proposes an X-ray pulsar-based airborne clock error estimation method.A pulse phase propagation model incorporating the clock e... In order to autonomously calibrate the airborne clocks of deep space explorers,this paper proposes an X-ray pulsar-based airborne clock error estimation method.A pulse phase propagation model incorporating the clock error is derived.Given that both the clock noise and the pulsar timing noise are of power-law spectral densities,their combination is modeled as a Fractional Brownian Motion(FBM)with a fractional-order power spectral density.The clock error series is modeled as a Gaussian Process(GP)with a mean function in the form of 2-order polynomial and an FBM-based covariance function.Finally,the clock error and the hyperparameters of GP are fast estimated by an iterated estimation method.The proposed method is validated via the real clock error data of the G05 satellite in the Global Positioning System(GPS)and the real data of pulsars from the Neutron star Interior Composition ExploreR(NICER). 展开更多
关键词 Atomic clock Clock error estimation Fractional Brownian motion Gaussian process X-ray pulsar
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Comparative evaluation of single-mask and single-shot X-ray phase-contrast and dual-energy computed tomography analyses on soft-tissue phantom 认领 引用
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作者 Chang Li Xiao-Xuan Ren +6 位作者 Liang-Liang Lv Shu-Yi Sun Jian Zhang Yin-Qi Lei Xiao-Dong Pan Cui Zhang Gong-Ping Li 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第5期241-251,共11页
In clinical diagnosis,conventional X-ray absorption-contrast computed tomography(XACT)technology cannot effectively differentiate diseased tissues from the healthy ones.X-ray phase-contrast CT(XPCT)and dual-energy CT(... In clinical diagnosis,conventional X-ray absorption-contrast computed tomography(XACT)technology cannot effectively differentiate diseased tissues from the healthy ones.X-ray phase-contrast CT(XPCT)and dual-energy CT(DECT),emerging X-ray imaging technologies with superior diagnostic capabilities,address this issue through different principles.While both XPCT and DECT have advantages and disadvantages in medical applications,their systematic comparison is lacking.Using GEANT4 and MATLAB,in this study,we established an X-ray phase-contrast imaging(XPCI)model based on single-mask and single-shot edge illumination for fast XPCT imaging,comparing it with DECT on soft-tissue phantom.XACT served as a reference for comparison.The study introduces an evaluation system using statistical measures including absolute error,mean absolute error,structure similarity index measure,peak signal-to-noise ratio,and contrast-to-noise ratio.Results show XPCT images are superior to DECT.The XPCI model can be improved on existing medical CT for widespread medical application. 展开更多
关键词 Comparative evaluation X-ray phase-contrast CT Edge illumination Dual-energy CT GEANT4
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Application of X-ray computed tomography imaging in the digital modeling of asphalt mixtures:A state of the art review 认领 引用
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作者 Penghui Wen Zhentong Fan +3 位作者 Qian Chen Tengwang Ge Longting Ding Chaohui Wang 《Journal of Road Engineering》 EI CAS 2026年第2期332-363,共32页
To enhance the application value of CT technology in road engineering and offer significant technical support for digital characterization and visual examination of the microstructure of asphalt mixtures,the operation... To enhance the application value of CT technology in road engineering and offer significant technical support for digital characterization and visual examination of the microstructure of asphalt mixtures,the operational principles of X-ray CT and its applications related to the development of digital models for asphalt mixtures were introduced.The factors influencing the quality of CT images of asphalt mixtures have been systematically summarized,and the impact of various scanning process parameters on image quality was analyzed.The characteristics and application scope of CT image quality enhancement and threshold segmentation techniques were elucidated.The primary applications of X-ray CT in the context of digital models of asphalt mixtures were discussed,including phase analysis(encompassing air voids,aggregates,and additives),damage assessment(addressing freeze-thaw damage,mechanical damage,and crack healing),dimensional measurement(such as asphalt mortar thickness and pavement surface texture depth),and virtual experimentation(including finite element and discrete element methods).Additionally,the current state of research and the challenges associated with the use of X-ray CT in the analysis of the microstructure of asphalt mixtures were examined.This study serves as a valuable reference for future investigations into the application of X-ray CT in the digital characterization and analysis of asphalt mixtures. 展开更多
关键词 Road materials Asphalt mixtures X-ray CT Image processing Digital model Microstructure
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Ce3+-doped Sr0.84(Lu,Gd)0.16F2.16 glass-ceramics scintillators for high resolution X-ray imaging 认领 引用
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作者 Jiajia Guo Junyu Chen +4 位作者 Lianjie Li Abhishek Wadhwa Jincheng Du Xusheng Qiao Hai Guo 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第5期1435-1443,共9页
Glass scintillators have the advantages of low cost,simplified manufacturing,and high transparency,but their luminescent efficiency is limited due to high host phonon energy.To develop novel glass scintillator materia... Glass scintillators have the advantages of low cost,simplified manufacturing,and high transparency,but their luminescent efficiency is limited due to high host phonon energy.To develop novel glass scintillator materials,glass-ceramics(GC)is an effective route that combines the high efficiency of the crystalline phases and high transparency and easy processing of the glass matrix.This article explored the photoluminescent property and scintillating performance of GC scintillators based on Ce3+-doped Sr0.84(Lu,Gd)0.16F2.16 crystalline phases.Molecular dynamics simulations were employed to investigate the phase separation of oxyfluoride glass matrix,which helps to design GC materials with high performance.The X-ray excited luminescence(XEL)intensity of samples increases from 63%to 133%(as compared to industrial standard Bi4Ge3O12 crystals)by adjusting the concentrations of Gd3+and Ce3+ions and thermal treatment temperature profiles.The optimal sample with high transmittance(exceeds 73%in visible region),short lifetime(60 ns),excellent thermal stability(93%at 423 K),satisfactory resistant irradiation stability and high spatial resolution(20 lp/mm)for X-ray imaging is obtained.Above results demonstrate that Ce3+-doped Sr0.84(Lu,Gd)0.16F2.16 GC scintillators have potential for practical applications in X-ray imaging field. 展开更多
关键词 Ce3+ion Scintillators X-ray imaging Glass-ceramics Molecular dynamics simulation Rare earths
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Charge transport manipulation of lead-free perovskite A3Sb2X9 single crystal for stable and sensitive x-ray detection 认领 引用
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作者 Jiacheng Pi Lei Zhao +9 位作者 Ruixin Shi Binxia Jia Depeng Chu Ziyang Feng Yaohui Li Mingyue Wei Jiangshan Feng Yunxia Zhang ShengzhongLiu Yucheng Liu 《InfoMat》 SCIE CSCD 2026年第8期64-75,共12页
Compared with three-dimensional(3D)perovskites,low-dimensional perov-skites can effectively enhance device stability and reduce leakage current due to the shielding effect of A-site cations and high resistivity,thus s... Compared with three-dimensional(3D)perovskites,low-dimensional perov-skites can effectively enhance device stability and reduce leakage current due to the shielding effect of A-site cations and high resistivity,thus showing broad application prospects in the field of high-energy radiation detection.In this study,high-quality lead-free A3Sb2X9 type single crystals(SCs)with large size are grown via a solution method.The manipulation mechanism of charge transport in these low-dimensional perovskite SCs by ion radius,coordination ability,and charge distribution characteristics is systematically investigated.Furthermore,the collaborative optimization mechanism of x-ray detection per-formance through crystal structure design and charge transport performance manipulation is elaborately revealed,which provides an important foundation for designing high-quality and low-toxicity perovskite SCs to achieve high signal-to-noise ratio(SNR)x-ray detectors.Therefore,under the premise of maintaining superior stability and high resistivity,the optimized lead-free low-dimensional perovskite SCs achieve comparable detection performance to that of lead-based perovskites.Specifically,the fabricated SC x-ray detectors exhibit high resistivity(1011Ωcm),largeμτproduct(7.9×10-3 cm2 V-1),high detec-tion sensitivity(3073μC Gy-1 cm-2),ultra-low detection limit(0.37 nGy s-1),and negligible dark current drift(6.8-10-8 nA cm-1 s-1 V-1).This rare combination of superior properties enables the SC detector to achieve high-resolution(7.5 lp mm-1)x-ray imaging. 展开更多
关键词 A3Sb2X9 perovskite carrier transport lead-free single crystal x-ray detection
Exceptional one-dimensional hybrid lead halide for high-performance X-ray detection through hydrogen bond enhanced charge transport 认领 引用 被引量：1
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作者 Xue-Na Tang Qingshun Fan +2 位作者 Guang-Ning Liu Cuncheng Li Zhihua Sun 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第6期624-629,共6页
The immense potential of one-dimensional(1D)hybrid lead halide perovskites(HLHPs)in single crystal X-ray detection is hindered by their relatively low charge transport abilities and needle-like morphology.Alloying mix... The immense potential of one-dimensional(1D)hybrid lead halide perovskites(HLHPs)in single crystal X-ray detection is hindered by their relatively low charge transport abilities and needle-like morphology.Alloying mixed cations in 1D HLHP is expected to realize superior charge mobility and large single crystals.Herein,we report a 1D HLHP of(ATZ)(EA)4Pb3I11(1)with thiazol-2-aminium(ATZ)+and ethanaminium(EA)+as the mixed cations,demonstrating an exceptional 1D HLHP for high-performance X-ray detector.The H…I hydrogen bonds with a fraction of 69.7%are stronger than those in 1D HLHPs containing solely(ATZ)+or(EA)+cations.The single crystal of 1 posesses remarkable semiconducting properties,including a high resistivity(1.94×1011Ωcm)and a large mobility-lifetime product(2.22×10−4cm2/V),which contribute to the outstanding X-ray detection,manifested by a high sensitivity of 1356μC Gyair−1cm−2and an ultra-low dark current drift of 5.01×10−8nA cm-1 s−1V−1. 展开更多
关键词 Lead halide Inorganic-organic hybrid Hydrogen bonds Mixed cation X-ray detection
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Flexible two-dimensional uranium-organic framework with upgraded radiation resistant for X-ray imaging 认领 引用
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作者 Jueqiong Wang Liwei Cheng +15 位作者 Yang Yang Dewen He Yingtong Fan Zhiwei Li Junhao Lu Yumin Wang Jia Lei Zhiyong Peng Aiping Jin Dan Zhou Zhizai Li Shuaihua Wang Lixi Chen Yaxing Wang Yanlong Wang Shuao Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第5期354-358,共5页
The intrinsic scintillation property of uranium has recently endowed this heaviest naturally occurring element with new opportunities for X-ray radiation detection and visualization.However,the low radiation stability... The intrinsic scintillation property of uranium has recently endowed this heaviest naturally occurring element with new opportunities for X-ray radiation detection and visualization.However,the low radiation stability of most uranium compounds hinders their practical application,particularly in X-ray imaging.Here,we presented a flexible two-dimensional uranium-organic framework(UOF,SCU-334)as an air-stable scintillating material for X-ray detection and,for the first time,a systematic investigation of X-ray imaging in UOFs.Following continuous high dose rate X-ray irradiation exceeding 50 Gy,which equals thousands of chest X-ray diagnoses,SCU-334 retains over 90%of its initial performance,representing a significant improvement over previously reported scintillating UOFs.The upgraded radiation resistance of SCU-334 is attributed to its flexible structure that dissipates energy more efficiently under high-energy particle bombardment through conformation fluctuation and relaxation.This work offers a promising approach to improve the radiation resistance of uranium-based scintillators. 展开更多
关键词 Uranium Metal-organic framework X-ray excited luminescence X-ray irradiation stability X-ray imaging
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Response estimation and evaluation of direct-conversion dual-layer perovskite X-ray detectors:a numerical study with a cascaded signal model 认领 引用
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作者 Han Cui Yu-Hang Tan +7 位作者 Xin Zhang Hao-Di Wu Ting Su Jiong-Tao Zhu Hai-Rong Zheng Dong Liang Xiang-Ming Sun Yong-Shuai Ge 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第2期156-168,共13页
This study aims to investigate the responses of a perovskite-based direct-conversion dual-layer flat-panel detector(DL-FPD)numerically.To this end,the X-ray sensitivity,spatial resolution quantified by the modulation ... This study aims to investigate the responses of a perovskite-based direct-conversion dual-layer flat-panel detector(DL-FPD)numerically.To this end,the X-ray sensitivity,spatial resolution quantified by the modulation transfer function(MTF),and detective quantum efficiency(DQE)of the DL-FPD are evaluated numerically using a linear cascade model.In addition,both the single-crystal(SC)and polycrystalline(PC)structures of MAPbI3are investigated,along with various other key parameters such as the material thickness,electric field strength,X-ray beam spectrum,and electronic readout noise.The results demonstrate that SC perovskite consistently exhibits better performance than PC perovskite owing to fewer material defects.Increasing the layer thickness may decrease the MTF,but can also enhance the sensitivity and DQE.Moreover,appropriately increasing the external electric field within the material can improve the sensitivity,MTF,and DQE.Finally,reducing the electronic readout noise can significantly enhance the DQE for low-dose imaging.This study demonstrates the potential of high-quality dual-energy X-ray imaging using direct-conversion perovskite DL-FPDs. 展开更多
关键词 X-ray imaging Dual-layer flat-panel detector Perovskite X-ray detector
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Impacts of X-ray energy and beam size on CD-SAXS measurement precision 认领 引用
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作者 Xu-Yang Qin Bing Guo +7 位作者 Nan Pan Xin-Hao Gao Shu-Min Yang Chun-Xia Hong Ying Wang Xiu-Hong Li Chun-Ming Yang Feng-Gang Bian 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第4期65-78,共14页
With the development of the semiconductor industry below the 7 nm scale,critical dimension small-angle X-ray scattering(CD-SAXS)has emerged as a powerful tool for quantitatively measuring nanoscale deviations.In this ... With the development of the semiconductor industry below the 7 nm scale,critical dimension small-angle X-ray scattering(CD-SAXS)has emerged as a powerful tool for quantitatively measuring nanoscale deviations.In this study,the effects of X-ray beam size and photon energy on the accuracy of critical dimension measurements were investigated.Critical dimensions measured using beams with different spot sizes showed different deviations from the expected values.Beam sizes that were either too large or too small did not improve confidence intervals.As the incident energy increased,the X-ray transmission rate increased,while the scattering cross section decreased,resulting in a gradual decrease in the signal-to-noise ratio of the diffraction peaks,which reduced the accuracy of the CD-SAXS measurements.An optimal accuracy was obtained at 12 keV with a smaller beam size.Using an effective trapezoid model,the results yielded an average pitch of 100.4±0.2 nm,width of 49.8±0.2 nm,height of 130.0±0.2 nm,and a sidewall angle below 1.1°±0.1°.These results provide crucial guidance for the future development of CD-SAXS laboratories and the construction of X-ray machines as well as robust support for research in related fields. 展开更多
关键词 Critical dimension small-angle X-ray scattering Nonlinear fitting Beam size X-ray energy Chip
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One-dimensional(C12H12N)3Cu3I6for high-performance direct X-ray detection 认领 引用
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作者 Pan Gao Qingzheng Kong +8 位作者 Ying Sun Qian Ma Qi Wang Zeyu Guo Ledi Li Bingbing Li Jingwei Xu Xiaomei Jiang Zhaolai Chen 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2026年第1期61-67,共7页
X-ray detectors,as crucial elements in medical imaging and industrial fields,can be categorized into direct and indirect types.Direct detectors,which directly convert X-ray photons into electrical signals,exhibit high... X-ray detectors,as crucial elements in medical imaging and industrial fields,can be categorized into direct and indirect types.Direct detectors,which directly convert X-ray photons into electrical signals,exhibit high sensitivity and low detection limits,enabling the capture of high-resolution images and reducing radiation exposure to patients.Organic copper halides,recognized as potential active materials for X-ray detection,have been widely explored in the indirect scintillation field but remain under-explored in direct X-ray detector applications.In this work,(C12H12N)3Cu3I6is demonstrated as an efficient semiconductor for direct X-ray detection with excellent stability.A lateral-structured X-ray detector was fabricated with gold electrodes,which exhibits a maximum sensitivity of 1464.14μC·Gy-1·cm-2,a lowest detection limit of 19.8 nGy·s-1,a high on-off ratio of 2140,and an excellent operational stability of retaining 96%performance after 600 s continuous X-ray radiation.Furthermore,the detector successfully imaged a 0.1 mm“F”-shaped lead sheet,validating its capacity for X-ray imaging.This study highlights the potential of(C12H12N)3Cu3I6as a promising semiconductor for high-performance direct X-ray detection,expanding the application scope of organic copper halides in this critical field. 展开更多
关键词 Organic copper halides One-dimensional structure X-ray detection X-ray imaging
Three-dimensional characterization of intermetallic compound formation in magnesium alloys with micro X-ray computed tomography 认领 引用
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作者 SUN Wei HU Xiao-juan +5 位作者 DENG Yang-chao YANG Yang YAO Hu ZHANG Yong-hong ZHANG Rui-feng ZENG Guang 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第1期160-174,共15页
This comprehensive study investigates the formation and evolution of intermetallic compounds during the solidification process of magnesium alloys using advanced micro X-ray computed tomography.By analyzing both commo... This comprehensive study investigates the formation and evolution of intermetallic compounds during the solidification process of magnesium alloys using advanced micro X-ray computed tomography.By analyzing both common industrial Mg-Al-Zn alloys and a novel rare earth-containing Mg-Ni-Gd-Y alloy,we aim to characterize the nucleation,growth,and distribution of Al-Mn and eutectic intermetallics across various stages of solidification.The non destructive imaging technique employed in this research provides high-resolution,three-dimensional insights into the microstructural development,allowing for a detailed examination of the morphology,spatial arrangement,and interconnectivity of intermetallic phases.This approach overcomes limitations of traditional two-dimensional metallographic methods,offering a more comprehensive understanding of the complex three-dimensional structures formed during solidification. 展开更多
关键词 magnesium alloy X-ray computed tomography solidification intermetallics defects
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Orthogonal Stimulus-Responsive Ca3Ga2Ge3O12:Pr3+for Real-Time X-Ray Dosimetry and Dynamic Information Encryption 认领 引用
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作者 Qi Chen Wenqiang Wang +8 位作者 Ping Liu Weifang Bu Yang Yue Yifan Shang Feixiang Xiong Ting Wang Xiangke Niu Zhiqiang Li Xue Yu 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期422-429,共8页
Multimodal luminescent materials are crucial for advanced information encryption,real-time dosimetry,and high-resolution bioimaging,yet integrating orthogonal stimulus-responsiveness into a single-component system is ... Multimodal luminescent materials are crucial for advanced information encryption,real-time dosimetry,and high-resolution bioimaging,yet integrating orthogonal stimulus-responsiveness into a single-component system is challenging.Herein,we report a Pr3+-doped Ca3Ga2Ge3O12(CGGO:Pr3+)garnet phosphor that exhibits orthogonally addressable luminescence under ultraviolet(UV)light,X-ray radiation,and thermal stimulation.This phosphor demonstrates dual spectrally distinct emissions with relative intensities that can be precisely modulated by varying the excitation wavelength or ambient temperature,enabling color tuning from blue to orange.Furthermore,time-resolved multi-color afterglow after UV or X-ray pre-excitation,along with thermally stimulated luminescence,provides complementary readout channels.Notably,CGGO:Pr3+exhibits dose-rate-and temperature-dependent color evolution(from blue-white to orange-white)under concurrent UV and X-ray irradiation,facilitating real-time naked-eye monitoring of both X-ray dose rate and temperature.By leveraging these orthogonal response modes,we demonstrate visual real-time X-ray dose and temperature detection,high-security X-ray imaging,and 3D-encrypted quick response codes.This study establishes CGGO:Pr3+as a versatile single-component platform for orthogonal stimuli-responsive applications,advancing the fields of dynamic information encryption and instantaneous X-ray dose-rate visualization. 展开更多
关键词 dynamic information encryption orthogonal stimulus-responsiveness X-ray dosimetry
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Hue-changing luminescence and near-ultraviolet/X-ray dual excitation properties of GdTaO4 multi-doped with Eu3+,Er3+ and Tm3+ 认领 引用
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作者 Seonghun Choi Sangwon Wi +2 位作者 Nguyen Duc Ton Hongjoo Kim Yunsang Lee 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期47-55,共9页
In this study,we investigated novel luminescence properties of GdTaO4,a material with high density and high effective atomic number,doped singly and triply with Eu3+,Er3+,and Tm3+(GTO:RE,RE=Eu,Er,and Tm).S... In this study,we investigated novel luminescence properties of GdTaO4,a material with high density and high effective atomic number,doped singly and triply with Eu3+,Er3+,and Tm3+(GTO:RE,RE=Eu,Er,and Tm).Single-doped samples,GTO:Eu,GTO:Er,and GTO:Tm,exhibit distinct red,green,and blue color emissions with high purity,respectively.For the tr iple-doped samples,we obtain a high tunability of emission color depending on the excitation wavelength.The emission hue changes in the order of bluepurple-cyan-white-yellow-green-magenta with the increase in the excitation wavelength in the nearultraviolet(NUV)range.Furthermore,we observe a significant X-ray-excited luminescence for GTO:RE.Our findings suggest that GTO:RE can be a multimodal phosphor providing versatile luminescence properties,such as the colorful emission hue change and dual excitation luminescence under both NUV and X-ray excitations. 展开更多
关键词 Rare earths GdTa04 Photoluminescence X-ray luminescence
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Enhancement strategies for light yield and spatial resolution of perovskite scintillators in indirect X-ray detection 认领 引用
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作者 Rui Liu Chengxu Lin +6 位作者 Zhiyong Liu Chenyu Li Shuang Xi Minggao Zhang Xingyue Liu Guanglan Liao Tielin Shi 《ENGINEERING Mechanical Engineering》 SCIE CAS CSCD 2026年第1期5-28,共24页
Thanks to the high quantum efficiency,large migration lifetime,excellent X-ray absorption capability,and ease of crystal growth,perovskite scintillators have received widespread attention in recent years and have beco... Thanks to the high quantum efficiency,large migration lifetime,excellent X-ray absorption capability,and ease of crystal growth,perovskite scintillators have received widespread attention in recent years and have become highly competitive X-ray detection scintillators.Compared with traditional inorganic scintillators,the tunable structure and diverse chemical composition of perovskite scintillators are unique advantages in optimizing their scintillation performance.Fully understanding the relationship between scintillation characteristics with structure and chemical composition of perovskite scintillators is the key to achieve high-sensitivity detection and high-resolution imaging.The latest progress and future prospect of key performance indicators such as light yield and spatial resolution in perovskite X-ray indirect detection and imaging are reviewed herein.First,the basic principles of X-ray indirect detection and the key performance parameters of X-ray indirect detectors are discussed.Then,the methods to improve the light yield of perovskite scintillators are discussed from the aspects of the characteristics of perovskite materials themselves,the introduction of ion doping to adjust the perovskite structure,and the improvement of scintillation preparation processes.We further discuss how to suppress fluorescence crosstalk to improve the spatial resolution of X-ray imaging from the aspects of material size,scintillation preparation process,and scintillation structure.Finally,we emphasize the challenges that current perovskite scintillators still face and provide prospects for their future development. 展开更多
关键词 perovskite scintillator indirect X-ray detection light yield spatial resolution enhancement strategy
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