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Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： qiang li li‑Jiao Wang Xiang‑Biao Qiu Jing‑Wen li Wei Xu Tao li Ze‑Bin lin Chang‑jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑yu Tang rong zhang han‑Tao Jing Bo mei Qi An Hao‑Fan Bai Jiang‑Bo Bai jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai han Zi‑jie han Guo‑Zhu He Yong‑Cheng He yang Hong Yi‑Wei Hu han‑Xiong huang Wei‑hua Jia Hao‑yu Jiang Wei Jiang Zhi‑jie Jiang zheng‑Yao Jin ling Kang Bo li Chao li Gong li Jia‑Wen li Xiao li yang li jie liu rong liu Shu‑Bin liu Guang‑yuan Luan Bin‑Bin Qi jie ren Zhi‑zhou ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu li‑Kun Xie Yi‑Wei yang han Yi Yong‑Ji yu Guo‑Hui zhang lin‑Hao zhang Mo‑han zhang Qi‑Wei zhang Xian‑Peng zhang yu‑liang zhang yue zhang Zhi‑Yong zhang Mao‑yuan Zhao Lu‑Ping zhou Zhi‑Hao zhou Ke‑jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-yu Tang Rui-Rui Fan qiang li Gong li Dong liu zheng-Yao Jin xing-Zhu Cui Tian-Xiang Chen Yi-Wei yang rong liu han Yi yang li Zhen yang Qi An Hao-Fan Bai Jiang-Bo Bai jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai han Zi-jie han Guo-Zhu He Yong-Cheng He yang Hong Yi-Wei Hu han-Xiong huang Wei-hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang ling Kang Bo li Chao li Jia-Wen li Xiao li jie liu Shu-Bin liu Guang-yuan Luan Chang-jun Ning Bin-Bin Qi jie ren Zhi-zhou ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-xin Tan li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu li-Kun Xie Yong-Ji yu Guo-Hui zhang lin-Hao zhang Mo-han zhang Qi-Wei zhang Xian-Peng zhang yu-liang zhang yue zhang Zhi-Yong zhang Mao-yuan Zhao Lu-Ping zhou Zhi-Hao zhou Ke-jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Frontiers in high entropy alloys and high entropy functional materials

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Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao zhang Wen huang Fu-jie yu Qi Zhao xin-Dong Zhu Tao Feng Yao Jiang Xiao-Ming li Xue-fei Miao He Zhu Si Lan Xue-Qian Wang Bao-Long Shen Zhe Jia Feng-Qi zhang Wei Wang Qi liu yang ren Xun-li Wang Xiao-Ya Cui Xiao-yang Wang Ya-Nan Chen Bing-Bing Fan Meng-Ru li Qi-Long Gao Jia-Ming Guo Zeng-Bao Jiao Zhi-Min Guo yu-Ping Zhao Qian yu Rui huang ling-Kun zhang Yi-Ping Lu Xu-Bo li huai-jun lin yan Ma Wei-Ming yang Zhi-hua Shen Hai-yan He Yong-Gang Sun Yong-Jiang huang De-Zhuang Wang Qing-Feng liu fei-yang Wang Hui liu Hong-Hui Wu li-qiang Wang yang Lu Nan Wang Tian-li Wang Wei-Bing liao Yi-han Wang yuan Wu yu-Zhen Yin jie Pan Yi zhang Qing Wang Jian-yang zhang Tao yang Yasir Sohail Jin-yu zhang hua Ji qiang li Wei-Di liu Zhi-Gang Chen Xiong-jun liu Wen Ma liang Mao Zhen-Duo Wu School of Materials Science and Engineering Nanjing University of Science and Technology Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and Engineering Southeast University Department of Physics City University of Hong Kong School of Materials Science and Engineering Tianjin University School of Physics and Microelectronics Zhengzhou University Department of Mechanical Engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Key Laboratory of Solidification Control and Digital Preparation Technology (liaoning Province) School of Materials Science and Engineering Dalian University of Technology Institute of Advanced Wear & Corrosion Resistance and Functional Materials Jinan University School of Mechanics and Civil Engineering China University of Mining and Technology School of Physical Sciences Great Bay University School of Materials Science andEngineering Harbin Institute of Technology State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Beijing Advanced Innovation Center for Materials Genome Engineering Research Institute for Carbon Neutrality University of Science and Technology Beijing Department of Mechanical Engineering The University of Hong Kong School of Computing Macquarie University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Institute of materials Shanghai University Department of Materials Science and Engineering C

Owing to their exceptional properties, high-entropy alloys(HEAs) and high-entropy materials have emerged as promising research areas and shown diverse applications. Here,the recent advances in the field are comprehensively reviewed,organized into five sections. The first section introduces the background of HEAs, covering their definition, significance,application prospects, basic properties, design principles, and microstructure. The subsequent section focuses on cutting-edge high-entropy structural materials, highlighting developments such as nanostructured alloys, grain boundary engineering,eutectic systems, cryogenic alloys, thin films, micro-nano-lattice structures, additive manufacturing, high entropy metallic glasses, nano-precipitate strengthened alloys, composition modulation, alloy fibers, and refractory systems. In the following section, the emphasis shifts to functional materials, exploring HEAs as catalysts, magneto-caloric materials, corrosion-resistant alloys, radiation-resistant alloys, hydrogen storage systems, and materials for biomedicine. Additionally, the review encompasses functional high-entropy materials outside the realm of alloys, including thermoelectric, quantum dots, nanooxide catalysts, energy storage materials, negative thermal expansion ceramics,and high-entropy wave absorption materials. The paper concludes with an outlook, discussing future directions and potential growth areas in the field. Through this comprehensive review,researchers, engineers, and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： Cutting-edge structural materials Cutting-edgefunctional materials High entropy alloys

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai yu Bai yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-jun Bi yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai yuchen Cai Haiying Cai huacheng Cai Lorenzo Calibbi junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang yue Chang Zhe Chang xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen hua-xing Chen Huirun Chen Jinhui Chen Ji-yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng huajie Cheng Shan Cheng Tongguang Cheng yunlong Chi Pietro Chimenti Wen han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-yun Dai xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

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深圳市新生儿脑卒中多中心现况调查

中国当代儿科杂志 2024年第5期26卷 450-455页

作者：时莉秀冯晋兴韦艳芳路欣茹张雨茜杨林颖何胜男陈佩娟韩静陈诚涂惠英余章斌黄进洁曾淑娟陈晚铃刘颖郭燕平毛姣玉李晓东张谦慎谢治利黄梅英晏昆山应尔雅陈俊王艳荣刘亚萍宋波刘华艳肖晓冬唐红王宇娜蔡茵莎龙琦许汉强王会战孙倩韩芳张瑞彪杨传忠窦蕾时会菊王瑞蒋萍无深圳市儿童医院新生儿科广东深圳518034 深圳市宝安区妇幼保健院新生儿科广东深圳518101 深圳市龙岗区妇幼保健院/汕头大学医学院龙岗妇幼临床学院新生儿科广东深圳518172 深圳市人民医院/暨南大学第二临床医学院/南方科技大学第一附属医院新生儿科广东深圳518020 深圳市龙岗中心医院/广州中医药大学深圳临床医学院新生儿科广东深圳518116 北京大学深圳医院新生儿科广东深圳518036 华中科技大学协和深圳医院新生儿科广东深圳518052 香港大学深圳医院新生儿科广东深圳518053 深圳市龙岗区人民医院新生儿科广东深圳518172 深圳市南山区妇幼保健院新生儿科广东深圳518067 深圳市第三人民医院新生儿科广东深圳518112 深圳市龙华区中心医院新生儿科广东深圳518110 深圳市盐田区人民医院新生儿科广东深圳518081 深圳远东妇产医院新生儿科广东深圳518002 深圳市第二人民医院新生儿科广东深圳518025 陆丰市人民医院新生儿科广东陆丰516500 惠阳三和医院新生儿科广东惠州518200 惠州市第三人民医院新生儿科广东惠州516100 深圳市妇幼保健院新生儿科广东深圳518028 南方科技大学医院新生儿科广东深圳518055 深圳市罗湖区人民医院新生儿科广东深圳518005 深圳新生儿数据协作网

目的总结深圳市新生儿脑卒中发病率、临床特征及预后等情况,提高脑卒中新生儿的早期诊治能力。方法由深圳市儿童医院牵头,收集2020年1月—2022年12月深圳新生儿数据协作网组织21家单位收治的新生儿脑卒中36例,分析深圳市新生儿脑卒中发... 详细信息

目的总结深圳市新生儿脑卒中发病率、临床特征及预后等情况,提高脑卒中新生儿的早期诊治能力。方法由深圳市儿童医院牵头,收集2020年1月—2022年12月深圳新生儿数据协作网组织21家单位收治的新生儿脑卒中36例,分析深圳市新生儿脑卒中发病率、临床特征、治疗、预后等情况。结果深圳市21家医院2020、2021、2022年新生儿脑卒中的发病率分别为1/15137、1/6060、1/7704。缺血性脑卒中占75%(27/36),男性患儿占64%(23/36)。86%(31/36)的患儿在生后3d内起病,53%(19/36)以惊厥起病。颅脑影像学结果显示,22例(61%)大脑左侧发生梗死,13例(36%)基底节梗死;12例完成磁共振血管成像检查,9例(75%)累及大脑中动脉。29例患儿完成脑电图检查,21例(72%)出现尖波,10例(34%)出现电发作。不同医院对症支持治疗不同。12例(33%)完善新生儿行为神经测定评分,平均得分(32±4)分。共随访27例患儿12月龄左右的预后情况,44%(12/27)的患儿预后良好。结论新生儿脑卒中主要为缺血性脑卒中,多以惊厥为首发症状,多累及大脑中动脉,脑电图多出现尖波,神经发育评分较低,以对症支持治疗为主,部分患儿预后不良。

关键词：脑卒中多中心研究新生儿

基于白光中子源的^(197)Au中子辐射俘获截面测量及共振参数分析

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物理学报 2024年第7期73卷 104-113页

作者：罗淏天张奇玮栾广源王晓宇邹翀任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉吴鸿毅顾旻皓余滔解立坤陈永浩安琪白怀勇鲍煜曹平陈昊磊陈琪萍陈裕凯陈朕崔增琪樊瑞睿封常青高可庆韩长材韩子杰何泳成洪杨黄蔚玲黄锡汝季筱璐吉旭阳蒋伟江浩雨姜智杰敬罕涛康玲康明涛李波李超李嘉雯李论李强李晓李样刘荣刘树彬刘星言穆奇丽宁常军齐斌斌任智洲宋英鹏宋朝晖孙虹孙康孙晓阳孙志嘉谭志新唐洪庆唐靖宇唐新懿田斌斌王丽娇王鹏程王琦王涛峰文杰温中伟吴青彪吴晓光吴煊羊奕伟易晗于莉于永积张国辉张林浩张显鹏张玉亮张志永赵豫斌周路平周祖英朱丹阳朱科军朱鹏朱兴华中国原子能科学研究院核数据重点实验室北京102413 中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803 核探测与核电子学国家重点实验室北京100049 中国科学技术大学近代物理系核探测与核电子学国家重点实验室合肥230026 北京大学物理学院核物理与核技术国家重点实验室北京100871 中国工程物理研究院核物理与化学研究所绵阳621900 西北核技术研究院西安710024 中国科学院大学北京100049 中国科学技术大学工程与应用物理系合肥230026 北京航空航天大学物理学院北京100083 华能山东石岛湾核电有限公司荣成264312

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室... 详细信息

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室建立了伽马全吸收装置(Gamma total absorption facility,GTAF),该装置用28块六棱BaF_(2)晶体和12块五棱BaF_(2)晶体构成了外径25 cm,内径10 cm的球壳,覆盖了95.2%的立体角.利用GTAF在中国散裂中子源Back-n束线上,测量了197Au(n,γ)的反应截面数据.测量数据通过能量筛选、PSD方法、晶体多重性筛选进行了初步本底扣除,随后结合对^(nat)C及空样品的测量数据对本底进行了分析及扣除,获得了197Au俘获反应的产额,利用SAMMY程序拟合得到了^(197)Au在1—100 e V的共振能量、中子共振宽度和伽马共振宽度参数.实验测量结果与ENDF/B-VIII.0数据库符合良好,其共振参数存在一定差异,分析原因可能与GTAF能量分辨率、Back-n的中子能谱测量精度、以及实验本底扣除方法相关,这也是下一步工作的重点.

关键词：中子辐射俘获截面共振参数白光中子源伽马全吸收装置

维普期刊数据库博看期刊

Diagnosis and Treatment of Cholangiocarcinoma: A Consensus from Surgical Specialists of China

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Journal of huazhong University of Science and Technology(Medical Sciences) 2014年第4期34卷 469-475页

作者： Jian-qiang Cai Shou-wang Cai Wen-ming Cong Min-shan Chen Ping Chen Xiao-ping Chen yan-ling Chen Yi-fa Chen Chao-liu Dai qiang huang Zhi-yong huang Bo Jiang Bin Jiang Ke-wei Jiang Bo li Zong-fangli li-jian liang Bin liu Hui-chun liu lian-xin liu Qing-guang liu rong liu Ying-bin liu Jian-guo Lu shi-chun Lu Yi Lu Yi-lei Mao Bin mei jun Niu Bao-gang Peng Xiao Qin yu-dong Qiu Guang-yi Wang Yao-don Wangg Zhi-ming Wang ren-hua Wan Ya-fu Wu Bao-cai xing Feng Xia Ge-liang Xu Jia-mei yang Xiao-fang yu Yong Zeng Yong-yi Zeng Bi-xiang zhang Bin-hao zhang Qi-yu zhang Shui-jun zhang Wan-guang zhang Yong-jie zhang Zhi-wei zhang Dong zhou Wei-ping zhou Cancer Institute and Hospital Chinese Academy of Medical Sciences Chinese PLA General Hospital Eastern Hepatobiliary Surgery Hospital of Second Military Medical University Sun Yat-sen University Cancer Center Daping Hospital of Third Military Medical University Tongji Hospital Tongji Medical CollegeHuazhong University of Science and Technology Fujian Medical University Union Hospital Shengjing Hospital of China Medical University Anhui Provincial Hospital Hunan Provincial People’s Hospital Taihe Hospital Affiliated to Hubei University of Medicine Peking University People’s Hospital West China Hospital Sichuan University The Second Affiliated Hospital of Xi’an Jiao Tong University The First Affiliated Hospital Sun Yat-sen University First Affiliated Hospital of Kunming Medical University The First Affiliated Hospital of Bengbu Medical College The First Affiliated Hospital of Harbin Medical University The First Affiliated Hospital of Xi’an Jiao Tong University xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Tangdu Hospital of Fourth Military Medical University Peking Union Medical College Hospital Qilu Hospital of Shandong University The First Affiliated Hospital of Guangxi Medical University Nanjing Drum Tower Hospital The First Affiliated Hospital of Jilin University Fujian Provincial Hospital Xiangya Hospital of Central South University The First Affiliated Hospital of Nanchang University Beijing Cancer Hospital Southwest Hospital of Third Military Medical University Shenzhen People’s Hospital The First Affiliated Hospital of Fujian Medical University The First Affiliated Hospital of Wenzhou Medical University The First Affiliated Hospital of zhengzhou University Fujian Provincial Cancer Hospital

Cholangiocarcinoma refers to malignant tumors that develop in epithelial lining of biliary system, and it is divided into two categories according to tumor location, intrahepatic cholangiocarcinoma （ICC） and extrahepatic cholangiocarcinoma （ECC）. ICC occurs from the epithelial cells of the intrahepatic bile duct, its branches and interlobular biliary tree; and ECC is divided into hilar cholangiocarcinoma and distal cholangiocarcinoma by the circumscription at the confluence of cystic duct and the common hepatic duct.

关键词： A Consensus from Surgical Specialists of China Diagnosis and Treatment of Cholangiocarcinoma

Timing analysis of the black hole candidate EXO 1846–031 with Insight-HXMT monitoring

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Research in Astronomy and Astrophysics 2021年第3期21卷 193-204页

作者： He-xin liu yue huang Guang-Cheng Xiao Qing-Cui Bu Jin-Lu Qu Shu zhang Shuang-Nan zhang Shu-mei Jia Fang-jun Lu Xiang Ma lian Tao Wei zhang li Chen li-Ming Song Ti-Pei li yu-Peng Xu Xue-Lei Cao Yong Chen Cong-Zhan liu Ce Cai Zhi Chang Gang Chen Tian-Xiang Chen Yi-Bao Chen yu-Peng Chen Wei Cui Wei-Wei Cui Jing-Kang Deng Yong-Wei Dong yuan-yuan Du Min-Xue Fu Guan-hua Gao He Gao Min Gao Ming-yu Ge yu-Dong Gu Ju Guan Cheng-Cheng Guo Da-Wei han Jia Huo Lu-hua Jiang Wei-Chun Jiang Jing Jin Yong-jie Jin ling-Da Kong Bing li Cheng-Kui li Gang li Mao-Shun li Wei li Xian li Xiao-Bo li Xu-Fang li yang-Guo li zheng-Wei li Xiao-hua liang Jing-yuan liao Bai-Sheng liu Guo-Qing liu Hong-Wei liu Xiao-Jing liu Yi-Nong liu Bo Lu Xue-Feng Lu Qi Luo Tao Luo Bin Meng Yi Nang Jian-Yin Nie Ge Ou Na Sai ren-Cheng Shang xin-Ying Song liang Sun Ying Tan You-li Tuo Chen Wang Guo-Feng Wang Juan Wang ling-jun Wang Weng-Shuai Wang yu-Sa Wang Xiang-yang Wen Bai-yang Wu Bo-Bing Wu mei Wu Shuo Xiao Shao-lin Xiong He Xu Jia-Wei yang Sheng yang yan-Ji yang Yi-jung yang Qi-Bin Yi Qian-Qing Yin yuan You Ai-mei zhang Cheng-Mo zhang Fan zhang Hong-mei zhang Juan zhang Tong zhang Wan-Chang zhang Wen-Zhao zhang Yi zhang Yi-fei zhang Yong-jie zhang yuan-hang zhang yue zhang Zhao zhang Zhi zhang Zi-liang zhang Hai-Sheng Zhao Xiao-Fan Zhao shi-jie zheng Yao-Guang zheng Deng-Ke zhou Jian-Feng zhou yu-Xuan Zhu ren-lin Zhuang yue Zhu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls Universität72076 TubingenGermany Department of Astronomy Beijing Normal UniversityBeijing 100088China Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China College of Physics Sciences&Technology Hebei UniversityBaoding 071002Hebei ProvinceChina

We present the observational results from a detailed timing analysis of the black hole candidate EXO 1846-031 during its outburst in 2019 with the observations of Insight-HXMT,NICER and *** outburst can be classified roughly into four different ***-C quasi-periodic oscillations(QPOs)observed by NICER(about 0.1-6 Hz)and Insight-HXMT(about 0.7-8 Hz)are also reported in this ***,we study various physical quantities related to QPO *** QPO rms-frequency relationship in the energy band 1-10 keV indicates that there is a turning pointing in frequency around2 Hz,which is similar to that of GRS 1915+105.A possible hypothesis for the relationship above may be related to the inclination of the source,which may require a high inclination to explain *** relationships between QPO frequency and QPO rms,hardness,total fractional rms and count rate have also been found in other transient sources,which can indicate that the origin of type-C QPOs is non-thermal.

关键词： X-ray binaries black hole candidate QPO EXO 1846–031

CO_2浓度升高对森林土壤微生物呼吸与根(际)呼吸的影响

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植物生态学报 2007年第3期31卷 386-393页

作者：周玉梅韩士杰郑俊强辛丽花张海森中国科学院沈阳应用生态研究所沈阳110016 沈阳农业大学沈阳110061

根呼吸与微生物呼吸的作用底物不同,二者对高浓度CO2的响应机理及敏感程度亦不同。在大气CO2浓度升高的背景下,精确区分根呼吸与微生物呼吸是构建森林生态系统碳循环模型和预测森林生态系统碳源/汇关系所必需的。根(际)呼吸与微生物呼... 详细信息

根呼吸与微生物呼吸的作用底物不同,二者对高浓度CO2的响应机理及敏感程度亦不同。在大气CO2浓度升高的背景下,精确区分根呼吸与微生物呼吸是构建森林生态系统碳循环模型和预测森林生态系统碳源/汇关系所必需的。根(际)呼吸与微生物呼吸对高浓度CO2的响应呈增加、降低或无明显变化等不同趋势,根(际)呼吸变化主要与根生物量明显相关,细根的作用大于粗根;土壤微生物呼吸变化存在较大的不确定性,微生物量和微生物活性与土壤微生物呼吸相关或不相关。根系统对高浓度CO2的响应会潜在地影响微生物的代谢底物,进而影响微生物呼吸强度。凡影响土壤总呼吸的生物与非生物因子都会直接或间接地影响根呼吸与土壤微生物呼吸。

关键词：高浓度CO2 土壤呼吸根际土壤微生物