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Opportunities for production and property research of neutron-rich nuclei around N=126 at HIAF

Nuclear Science and Techniques 2024年第6期35卷 101-113页

作者： Shao-Bo Ma Li-Na Sheng Xue-Heng Zhang Shi-Tao Wang Kai-Long Wang Chun-Wang Ma Hool-Jin Ong Zhi-yu Sun Shu-Wen Tang yu-hong yu Xin-Tong Du Xiao-Bao Wei Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China University of Chinese Academy of Sciences Beijing 100049China College of Physics Henan Normal UniversityXinxiang 453007China Institute of Nuclear Science and Technology Henan Academy of ScienceZhengzhou 450046China Joint-Department for Nuclear Physics Lanzhou University and Institute of Modern PhysicsLanzhou 730000China Research Center for Nuclear Physics Osaka UniversityOsaka 567-0047Japan RIKEN Nishina Center Saitama 351-0198Japan Northwest Normal University Lanzhou 730070China

The study of nuclide production and its properties in the N=126 neutron-rich region is prevalent in nuclear physics and astrophysics *** upcoming High-energy FRagment Separator(HFRS)at the High-Intensity heavy-ion Accelerator Facility(HIAF),an in-flight separator at relativistic energies,is characterized by high beam intensity,large ion-optical acceptance,high magnetic rigidity,and high momentum resolution *** provides an opportunity to study the production and properties of neutron-rich nuclei around N=*** this paper,an experimental scheme is proposed to produce neutron-rich nuclei around N=126 and simultaneously measure their mass and lifetime based on the HFRS separator;the feasibility of this scheme is evaluated through *** results show that under the high-resolution optical mode,many new neutron-rich nuclei approaching the r-process abundance peak around A=195 can be produced for the first time,and many nuclei with unknown masses and lifetimes can be produced with high *** the time-of-flight corrected by the measured dispersive position and energy loss information,the cocktails produced from 208 Pb fragmentation can be unambiguously ***,the masses of some neutron-rich nuclei near N=126 can be measured with high precision using the time-of-flight magnetic rigidity *** indicates that the HIAF-HFRS facility has the potential for the production and property research of neutron-rich nuclei around N=126,which is of great significance for expanding the chart of nuclides,developing nuclear theories,and understanding the origin of heavy elements in the universe.

关键词： HFRS Fragmentation Neutron-rich nuclei around N=126 Mass measurement Lifetime

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基于BCPO发光材料近紫外有机发光二极管的电致发光效率与稳定性

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物理学报 2024年第4期73卷 263-271页

作者：任兴于宏宇张勇西南大学物理科学与技术学院微纳结构光电子学重庆市重点实验室重庆400715

近十年来,制备近紫外有机发光二极管成为有机电子学领域的研究热点之一.但是当器件的电致发光波长延伸到400 nm以下后,对器件中各功能层的材料选择提出了更高要求.本实验中,以宽带隙小分子材料BCPO(bis-4-(N-carbazolyl)phenyl)phenylph... 详细信息

近十年来,制备近紫外有机发光二极管成为有机电子学领域的研究热点之一.但是当器件的电致发光波长延伸到400 nm以下后,对器件中各功能层的材料选择提出了更高要求.本实验中,以宽带隙小分子材料BCPO(bis-4-(N-carbazolyl)phenyl)phenylphosphine oxide)为发光层,基于BCPO的发射光谱确定了电子传输材料和空穴传输材料,制备了电致发光峰位波长在384 nm附近的近紫外有机发光二极管.在最佳的器件结构下,器件的最大外量子效率达到2.98%,最大辐射功率达到38.2 mW/cm^(2).电致发光谱中波长在400 nm以下的近紫外光占比为57%.结果表明器件在恒压模式下展示了良好的稳定性,此外,对影响器件稳定性的多个关键因素给予了深入的分析.

关键词：有机发光二极管近紫外光辐射功率外量子效率

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“技防+监督”防控公立医院廉政风险的相关问题探讨

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医院管理论坛 2024年第4期41卷 48-51页

作者：余波余宏玉福建医科大学肿瘤临床医学院/福建省肿瘤医院

为了深入了解某省属公立医院关键重点岗位的廉政风险防控监督情况,通过问卷调查、结构化访谈等方法,全面分析了当前监督工作中存在的问题与挑战,提出了以“技防+监督”方式强化廉政风险防控的重要意义及相应解决方案。调研选取某省属公... 详细信息

为了深入了解某省属公立医院关键重点岗位的廉政风险防控监督情况,通过问卷调查、结构化访谈等方法,全面分析了当前监督工作中存在的问题与挑战,提出了以“技防+监督”方式强化廉政风险防控的重要意义及相应解决方案。调研选取某省属公立医院的多个关键重点岗位员工作为调查对象,通过设计问卷和开展结构化访谈,收集了大量第一手资料。调研发现公立医院在廉政风险防控监督方面存在监督部门缺乏信息技术人才,监督工作的制度化、标准化程度有待提高,信息泄露、篡改等风险不容忽视。调研提出“完善制度,摸清底数,统一科学谋划;排查词库,精准聚焦,强化节点管控;梳理流程,制定表单,稳步推进联网;嵌入系统,规范运行,实现风险防控”的规范化、标准化管理解决方案,护航公立医院高质量发展。

关键词：公立医院廉政风险防控技防手段监督

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浅析广东省阳山县大坪矿区Ⅳ号蚀变带特征

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世界有色金属 2024年第11期 97-99页

作者：于红玉广东省有色金属地质局九四〇队广东清远511520

广东省阳山县大坪铅锌多金属矿区位于广东省清远市,大地构造位置位于湘粤坳褶带NW侧,郴州-怀集断裂带的E侧,四会-吴川断裂带的W侧,大东山-贵东断裂的S部。通过结合《广东省清远市阳山县大坪铅锌多金属矿普查报告》、《1∶20万阳山幅》... 详细信息

广东省阳山县大坪铅锌多金属矿区位于广东省清远市,大地构造位置位于湘粤坳褶带NW侧,郴州-怀集断裂带的E侧,四会-吴川断裂带的W侧,大东山-贵东断裂的S部。通过结合《广东省清远市阳山县大坪铅锌多金属矿普查报告》、《1∶20万阳山幅》区域地质志及野外调查工作中的一些认识,研究Ⅳ号蚀变带特征及空间产出状态,并讨论Ⅳ号蚀变带形成过程及可能的成矿前景。

关键词： Ⅳ号蚀变带蚀变带产状断层改造作用

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清远市铁山脚-寨仔铜铅锌多金属矿普查区找矿潜力

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云南地质 2024年第3期43卷 351-355页

作者：胡韶华于红玉广东省有色金属地质局九四〇队广东清远511520

普查区岩体接触带长5km,物化探异常强度高,范围广,矽卡岩、大理岩化角岩化遍布,已知矿点有观音山铁铜矿床点、寨仔铁矿点、老虎头铅锌矿点,综合条件指示区域具有较好的成矿热源和成矿物质来源,具有较好的热液型多金属矿找矿前景。

关键词：热液型多金属矿找矿前景铁山脚-寨仔铜铅锌普查区广东清远

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A Mild and Efficient Procedure for the Preparation of Chromone-2-carboxylates

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Chinese Chemical Letters 2006年第8期17卷 1005-1008页

作者： Juan hong yu yu She YANG Ru yun JI State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 201203

A mild and efficient procedure to build up various chromone-2-carboxylates was developed. Condensation of diverse 2-hydroxyacetophones with tetr-butyl oxalate in the presence of sodium ethoxide could be accomplished rapidly under mild condition. Cyclodehydration was carried out to achieve chromone-2-carboxylates in one-pot with impressive yield. Advantages over conventional methods with diethyl oxalate were observed in yield and reaction time.

关键词： Chromone-2-carboxylates tea-butyl ethyl oxalate diethyl oxalate.

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A versatile test bench for photomultiplier tube characterization and its application in the DAMPE-PSD

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Nuclear Science and Techniques 2016年第3期27卷 145-152页

作者： Yong Zhou Zhi-yu Sun yu-hong yu Yong-Jie Zhang Fang Fang Jun-Ling Chen Bi-Tao Hu Institute of Modern Physics Chinese Academy of Sciences509 Nanchang RoadLanzhou 730000China School of Nuclear Science and Technology Lanzhou University222 South Tianshui RoadLanzhou 730000China Graduate University of the Chinese Academy of Sciences 19A Yuquan RoadBeijing 100049China

Performance characterization for massive photomultiplier tubes(PMTs) is a frequently encountered procedure in large nuclear and particle *** facilitate this work,a dedicated test bench system has been developed at the Institute of Modern Physics,Chinese Academy of *** two-dimensional photocathode position scanning capability is an intrinsic function of the test bench,and up to 25 PMTs,with the diameter smaller than 2",can be tested *** parameters of the light source pulses can be adjusted in a wide range,thus making it suitable for various characteristics *** test bench system is highly automated with all the controlling operations integrated into a single ***,the hardware platform is extensible which allows complex testing schemes,and the modularity in the software design makes the migration from one testing configuration to another light-weight and *** these features make the test bench versatile and reusable in different *** has been first used in the construction of the Plastic Scintillator Detector(PSD) of DArk Matter Particle Explorer(DAMPE),and a total of 570 Hamamatsu R4443 tubes were tested *** performance was verified and the testing results are also reported in this article.

关键词：试验台架系统光电倍增管通用性特性性能试验台中国科学院院士测试方案粒子探测器

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Review and perspective of materials for flexible solar cells

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Materials Reports(Energy) 2021年第1期1卷 45-68页

作者： Xiaoyue Li Peicheng Li Zhongbin Wu Deying Luo hong-yu yu Zheng-hong Lu Department of Physics Center for Optoelectronics Engineering ResearchYunnan UniversityKunming650091PR China Department of Materials Science and Engineering University of TorontoTorontoOntarioM5G 3E4Canada School of Microelectronics Southern University of Science and TechnologyShenzhen518055PR China

Thin-film flexible solar cells are lightweight and mechanically *** with rapidly advancing battery technology,flexible solar panels are expected to create niche products that require lightweight,mechanical flexibility,and moldability into complex shapes,such as roof-panel for electric automobiles,foldable umbrellas,camping tents,*** this paper,we provide a comprehensive assessment of relevant materials suitable for making flexible solar *** materials reviewed include metals,ceramics,glasses,and *** active materials,we focus primarily on emerging new semiconductors including small organic donor/acceptor molecules,conjugated donor/acceptor polymers,and organometal halide *** electrode materials,transparent conducting oxides,thin metal films/nanowires,nanocarbons,and conducting polymers are *** also discuss the merits,weaknesses,and future perspectives of these materials for developing next-generation flexible photovoltaics.

关键词： Flexible solar cells Substrates Electrodes Organic semiconductors Polymers Perovskites Silicon

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Two new flavonoid diglycosides from Cephalotaxus sinensis

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Chinese Chemical Letters 2007年第7期18卷 837-839页

作者： Wei Li Rong Ji Dai yu hong yu Liang Li Wei Wei Meng yu Lin Deng School of Life Science and Technology Beijing Institute of Technology Beijing 100081 China

Two new acetylated flavonoid diglycosides, scutellarein-5-O-[α-L-rhamnopyranosyl-（1 → 4）-β-D-6-O-acetylglucopyranoside]（1）, apigenin-5-O-[α-L-rhamnopyranosyl-（1→ 2）-β-D-3,6-di-O-acetylglucopyranoside] （2）, were isolated from the leaves of Cephalotaxus sinensis. Their structures were determined by chemical and spectroscopic methods including HR-FAB-MS,^1H-^1H COSY, HSQC and HMBC experiments.

关键词： Cephalotaxus sinensis (Rehd et Wile) Li Flavonoid diglycosides Scutellarein-5-O-[α-L-rhamnopyranosyl-(1→ 4)-β-D-6-O-acetylglucopyranoside] Apigenin-5-O-[α-L-rhamnopyranosyl-(1 → 2)-β-D-3,6-di-O-acetylglucopyranoside]

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Modeling,simulations,and optimizations of gallium oxide on gallium-nitride Schottky barrier diodes

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Chinese Physics B 2021年第2期30卷 457-461页

作者： Tao Fang Ling-Qi Li Guang-Rui Xia hong-yu yu School of Microelectronics Southern University of Science and TechnologyShenzhen 518055China Department of Materials Engineering the University of British ColumbiaVancouverBritish ColumbiaV6T1Z4Canada

With technology computer-aided design(TCAD)simulation software,we design a new structure of gallium oxide on gallium-nitride Schottky barrier diode(SBD).The parameters of gallium oxide are defined as new material parameters in the material library,and the SBD turn-on and breakdown behavior are *** simulation results reveal that this new structure has a larger turn-on current than Ga2O3 SBD and a larger breakdown voltage than Ga N ***,to solve the lattice mismatch problem in the real epitaxy,we add a Zn O layer as a transition *** simulations show that the device still has good properties after adding this layer.

关键词： technology computer-aided design(TCAD) gallium oxide(Ga2O3) gallium nitride(GaN) Schottky barrier diode(SBD)

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