Materials Advances
·
2023
·Vol. 4
·期 17
·3714-3723
·
IF 5
Lu Yao,Wanting Gui,Xunsheng Zhou,Chao Li,Shi Zhang,Jing Kui Zhao,Cai Lin Wang
All-inorganic lead-free perovskite scintillators have attracted wide applications in X-ray imaging recently due to their low cost, high resolution, and environmental friendliness. However, their potential application in thermal neutron detection has yet to be thoroughly explored. In this article, the properties of all-inorganic perovskite Cs3Cu2I5 scintillators for thermal neutron detection have been investigated. A simple synthesis process has been applied to produce Cs3Cu2I5 scintillators. The as-prepared Cs3Cu2I5 crystals exhibit intense blue emission with a photoluminescence quantum yield (PLQY) of 60.3%. A composite of 6LiF, Cs3Cu2I5, and poly(methyl methacrylate) (PMMA) has been utilized for thermal neutron detection, which has a light yield of about 28 000 photons per thermal neutron, four times that of a commercial 6Li-glass (GS20) scintillator (7000 photons per thermal neutron). Effective neutron-gamma-pulse-discrimination has been achieved using a network-dynamics digital filter, effectively separating thermal neutrons from gamma events. Our composite scintillators have a high thermal neutron absorption efficiency of about 60%. In addition, Cs3Cu2I5 crystals are more sensitive to X-ray irradiation compared to commercial Na-doped CsI scintillators. Our work provides a new strategy for large-scale perovskite-based thermal neutron detection and imaging.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2019
·Vol. 9
·期 10
·512
·
IF 2.061
Xiuhua Liu,Tonghua Zhu,Qingyuan Hu,Lan Dong,Zhaoyi Tan
9,10-diphenylanthracene (DPA) single crystal is a promising scintillator material for fast-neutron detection. Two centimetre-sized polymorph crystals of DPA were grown by melting and solution methods (DPA-Melt and DPA-Solution, respectively), and characterised by single-crystal X-ray diffraction, Raman spectroscopy, Fourier-transform infrared spectroscopy, fluorescence spectroscopy, UV-Vis absorbance spectroscopy, and thermogravimetric/differential scanning calorimetry. The DPA-Melt crystal possessed a P21/n structure, with excitation bands at approximately 331, 348, 367, and 387 nm, and the strongest emission wavelength at approximately 454 nm. On the other hand, the DPA-Solution crystal possessed a C2/c structure, with excitation bands at approximately 335, 353, 372, and 396 nm, and the strongest emission wavelength at approximately 468 nm. The two kinds of DPA crystals have the same molecular formula but different crystal structures, crystal lattice constants, and cell parameters. The theoretical density of the DPA-Solution crystal was 1.239 g/cm3, while that of the DPA-Melt crystal was 1.211 g/cm3. The two types of crystals exhibited the same melting point, but the thermal stability of the DPA-Solution crystal is better than that of the DPA-Melt crystal.Keywords:diphenylanthracene;polymorph;crystal structure;scintillator;neutron detection
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
·
2024
·
IF 1.9
Wanting Gui,Lu Yao,Xunsheng Zhou,Qi Wu,Chao Li,Shi Zhang,Yunfeng Zhan,Cai Lin Wang
Ag-based metal halide scintillators have recently attracted significant interest for X-ray imaging due to their high light yield and ultra-fast decay lifetime. These properties are advantageous for thermal neutron detection, yet their application in this area have not been thoroughly explored. In this article, we investigate the properties of Cu-doped Cs
2
AgI
3
metal halide scintillators for X-ray imaging and thermal neutron detection. A simple synthesis process was employed to produce Cu-doped Cs
2
AgI
3
scintillators. The as-prepared Cu-doped Cs
2
AgI
3
exhibited intense green emission with a photoluminescence quantum yield (PLQY) of 55 ± 2.7%. Cu-doped Cs
2
AgI
3
/PVDF plastic scintillation screen has been prepared and achieved a resolution of 5 lp/mm under X-ray radiation. A composite consisting of
6
LiF, Cu-doped Cs
2
AgI
3
, and Poly (methyl methacrylate) (PMMA) was utilized for thermal neutron detection, achieving a light yield of about 12,526±9 photons/thermal neutron, which is almost twice that of a commercial
6
Li-glass (GS20) scintillator (7000 photons/thermal neutron). Effective neutron-gamma pulse discrimination was achieved using a network dynamics digital filter, effectively separating thermal neutron events from gamma events.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2025
·
IF 1.5
Rui-Qiang Song,Chuang Liu,Yi-Yang Long,Ji-Feng Han,Jing Ren,Sen Qian
The development of low-cost and highly efficient thermal neutron detection materials to substitute the rare and expensive 3He gas is important for the area. Lithium-based glass (Li glass) is a promising candidate due to its simple fabrication process and low cost. This paper reports the optical properties and scintillation performance of a new Ce3+-doped Li glass, whose luminescence efficiency is significantly enhanced with a light yield of about 4770 ph/MeV, which is about 54% of that of BGO crystal, and the energy resolution is 14.5% for 662 keV gamma rays. The Ce3+-doped Li glass showed a high light yield of about 7058 ph/neutron, which is about 1.18 times that of the reference GS20 glass. The Ce3+ doped Li glass exhibits stronger gamma rays suppression capability compared to GS20 glass samples. Further optimizing the Ce3+ concentration and 6Li content is expected to achieve much superior neutron detection efficiency, positioning it as a promising alternative to 3He gas for efficient thermal neutron detection.
研究领域:
材料科学
·
核技术应用
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 24
·2212213
·
IF 29.4
Ziwan Du,Yuxuan Lai,Ruirong Bai,Bolun Wang,Qiang Zheng,Chuan Xu,Teng Lu,Jun Pei,Wei Li,Yu-Ning Wu,Kai Liu,Yun Liu,Engang Fu,Jing-Feng Li,Yigang Yang,Qian Li
Direct neutron detection based on semiconductor crystals holds promise to transform current neutron detector technologies and further boosts their widespread applications. It is, however, long impeded by the dearth of suitable materials in the form of sizeable bulk crystals. Here, high-quality centimeter-sized LiInP 2 Se 6 single crystals are developed using the Bridgman method and their structure and property characteristics are systematically investigated. The prototype detectors fabricated from the crystals demonstrate an energy resolution of 53.7% in response to α -particles generated from an 241 Am source and robust, well-defined response spectra to thermal neutrons that exhibit no polarization or degradation effects under prolonged neutron/ γ -ray irradiation. The primary mechanisms of Se-vacancy and In Li antisite defects in the carrier trapping process are also identified. Such insights are critical for further enhancing the energy resolution of LiInP 2 Se 6 bulk crystals toward the intrinsic level (≈8.6% as indicated by the chemical vapor transport-grown thin crystals). These results pave the way for practically adopting LiInP 2 Se 6 single crystals in new-generation solid-state neutron detectors.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Xunsheng Zhou,Binqing Zhao,Lu Yao,Wanting Gui,Longfei Chen,Chao Li,Shi Zhang,Cai Lin Wang
Eutectic scintillators with 6Li-containing thermal neutron absorbers are capable of efficient thermal neutron detection due to lamellar or rod-like optical waveguide structures formed by directional solidification. However, developing stable and bright eutectic scintillators with excellent neutron imaging capability remains a challenge. Here, the performance parameters for the scintillator have been substantially improved by the Al3+ codoping strategy in the LiF-CaF2:Eu2+ system. Due to the Al3+ codoping, the photoluminescence quantum yield (PLQY) is enhanced from 55% to 80%, the light yield is increased from 11,000 to 16,000 photons/thermal neutron, and the scintillation decay time is shortened by about 30 ns. It was shown that Al3+ codoping can effectively reduce the low-frequency shallow-energy level traps. Furthermore, large-sized (50 × 50 × 1.5 mm) translucent LiF-CaF2:Eu2+, Al3+ eutectic ceramics have been fabricated for an Anger-logic position-sensitive detector to realize two-dimensional (2D) thermal neutron detection. A codoped LiF-CaF2 eutectic scintillator provides a ∼1 mm spatial resolution and thermal neutron detection efficiency 16% higher than that of a commercial GS20 scintillator. This research paves the way for the application of large-area eutectic scintillators for efficient thermal neutron detection.
研究领域:
材料科学
·
核物理
·
光学
✓ 已验证
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 36
·2401992
·
IF 18.5
Dazhao Wang,Shiyu Zhang,Jingfei Chen,Degui Tu,Shichao Lv,Zheng Wei,Bin Tang,Zhijia Sun,Jianrong Qiu,Shifeng Zhou
The sensitive and rapid detection of thermal neutrons holds significant importance in various fields such as energy utilization, medical treatment, and national defense. However, the available thermal neutron scintillator is difficult to reach this target, mainly limited by the optical and scintillating performance. Herein, the in situ crystallization strategy of glass to construct scintillation glass composites for efficient thermal neutron detection is proposed. The congruent crystallization of the hybridized alkali earth silicate glass system may not only achieve high crystallinity, but also will keep the refractive indexing matching between the precipitated crystal and precursor glass phases. The prepared glass composites feature high luminescence efficiency, optical transmission and excellent neutron response properties. These factors collectively contribute to the robust neutron scintillation performance with a light output of ≈36 000 photons/neutron, which represents the highest value among glass-based scintillators. Moreover, the composite configuration brings about the additional function of thermal neutron and γ-ray discrimination. By using this composite scintillator, the neutron detector is constructed and demonstrates its application for detecting thermal neutron and distinguishing it from γ-ray in an online way. The studies prove that glass composites with high crystallinity are expected to be promising candidates for a new generation of multifunctional neutron detectors.
研究领域:
材料科学
·
核技术应用
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
·
2025
·
IF 1.9
Yingming Wang,Lingyan Xu,Lu Liang,Binghui Zhang,Zhentao Qin,Chongqi Liu,Lixiang Lian,Wei Zheng,Yanyan Lei,Qinzeng Hu,Shuai Song,Tao Wang,Wanqi Jie
Exploring organic single crystals that can reliably operate in high-temperature environments is crucial for advancing fast neutron detection in extreme conditions. In this study, large-sized (34 × 20 × 8 mm3) and high-quality 9,10-diphenylanthracene (DPA) single crystals were grown using a seed-assisted temperature-reduced crystallization method. The crystals showed strong thermal stability with a melting point of 252.4 °C. Under γ-ray excitation, the crystals demonstrated a high light yield of 25,776 photons/MeV with excellent linearity over a broad energy spectrum. Their radiation detection performance was systematically investigated under variable temperature conditions. Temperature-dependent pulse height spectrum revealed a steady increase in light output from -20 °C to 10 °C, followed by a significant decrease beyond 50 °C. However, the DPA detector retains 72.1% of its light output at 150 °C compared to 20 °C, demonstrating its excellent performance at high temperatures. Neutron/gamma pulse shape discrimination(PSD) was tested from −25 °C to 45 °C. At room temperature, the detector achieved a maximum figure of merit (FOM) of 3.82 at 2900 ± 100 keVee. Importantly, across the entire −25 °C to 45 °C range, the FOM remained above 1.5 for energies above 200 keVee, demonstrating stable PSD performance. These results collectively demonstrate the strong overall performance of DPA single crystals in both light yield and neutron/gamma discrimination. These findings underscore the great potential of DPA single crystals for fast neutron detection in high-temperature environments, establishing them as a valuable material for future applications in extreme conditions.
研究领域:
核医学
·
辐射探测
·
材料科学
·
核物理
·
仪器科学与技术
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2025
·
IF 4.1
Yingming Wang,Lingyan Xu,Lu Liang,Zhentao Qin,Zhuochen Cai,Kaifu Zhang,Chongqi Liu,Lixiang Lian,Wei Zheng,Yanyan Lei,Qinzeng Hu,Binbin Zhang,Tao Wang,Wanqi Jie
Organic scintillators occupy a significant niche in the realm of fast neutron detection. Nevertheless, the cultivation of large-sized and high-quality organic single crystals has persistently posed a formidable challenge. 9,10-diphenylanthracene (DPA) was chosen as a prospective material for fast neutron detection. The two-dimensional nucleation growth mechanism of DPA was revealed by detailed analysis of the microstructure of the crystal surface. By systematically optimising the growth parameters and processes, the nucleation and growth of DPA were effectively controlled, and centimetre-sized single crystal (27×20×7 mm 3 ) was successfully grown. The thermally activated fluorescence emission mechanism of DPA crystal was revealed using power-dependent and temperature-dependent photoluminescence spectroscopy. The fluorescence intensity increased with increasing temperature, suggesting its potential for neutron/gamma pulse shape screening (PSD) at high temperatures. High-quality crystal was prepared, achieving a FOM of 3.56, underscoring the potential of DPA as a superior material for fast neutron detection applications.
研究领域:
材料科学
·
核物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2021
·Vol. 14
·期 11
·3040
·
IF 3.623
Wei Zhang,Kaikai Wang,Xiaodan Hu,Xiaohong Zhang,Shuquan Chang,Haiqian Zhang
A shortage in the supply of3He used for thermal neutron detector makes researchers to find3He alternatives for developing new neutron detectors. Here, we prepared a neutron-sensitive composite liposome with tributyl borate and encapsulating with Fe3O4@oleic acid nanoparticles (Fe3O4@OA NPs), methylene blue (MB), or anti-albumin from bovine serum (anti-BSA). The tributyl borate compound was characterized by Fourier transform infrared spectroscopy (FT-IR). In addition, the morphology, element compositions, and magnetic properties of the composite liposome were investigated with transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM), respectively. The results indicated that a typical ellipsoidal magnetic liposome structure was obtained, and the lengths of the minor axis and major axis were 49 ± 1 nm and 87 ± 3 nm, respectively. Under thermal neutron irradiation, the structure of composite liposome was destroyed, and encapsulated reporter molecules were released, which was detected by ultraviolet–visible (UV–vis) spectroscopy and surface plasmon resonance (SPR) technology. The response of this sensor based on a destructive assay shows a good correlation with neutron doses. Besides, the sensor has a neutron to gamma-ray rejection ratio of 1568 at a thermal neutron flux rate of 135.6 n/cm2·s, which makes it a promising alternative to3He.Keywords:neutron detector;magnetic liposome;methylene blue (MB);anti-BSA;surface plasmon resonance
研究领域:
核物理
·
材料科学
·
纳米技术
·
辐射检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 25
·2209452
·
IF 29.4
Pei Li,Wei Cheng,Yifan Zhou,Dong Zhao,Jun Liu,Lingxi Li,Xiaoping Ouyang,Bo Liu,Wenbao Jia,Qiang Xu,Kostya (Ken) Ostrikov
State-of-the-art thermal neutron scintillation detectors rely on rare isotopes for neutron capture, lack stability and scalability of solid-state scintillation devices, and poorly discriminate between the neutron and gamma rays. The boron nitride (BN)-CsPbBr 3 perovskite nanocomposite aerogel scintillator enables discriminative detection of thermal neutrons, features the largest known size (9 cm across), the lowest density (0.17 g cm −3 ) among the existing scintillation materials, high BN (50%) perovskite (1%) contents, high optical transparency (85%), and excellent radiation stability. The new detection mechanism relies on thermal neutron capture by 10 B and effective energy transfer from the charged particles to visible-range scintillation photons between the densely packed BN and CsPbBr 3 nanocrystals. Low density minimizes the gamma ray response. The neutrons and gamma rays are discriminated by complete decoupling of the respective single pulses in time and intensity. These outcomes open new avenues for neutron detection in resource exploration, clean energy, environmental, aerospace, and homeland security applications.
研究领域:
材料科学
·
核物理学
·
辐射探测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）