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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

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

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

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

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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

New Measurements for ^(8)he Excited States

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chinese Physics Letters 2012年第8期29卷 69-72页

作者： XIAO Jun YE Yan-Lin cAO Zhong-xin jiang Dong-xing ZheNG Tao hua Hui LI Zhi-huan LI Xiang-qing GE Yu-cheng LOU Jian-Ling PANG Dan-Yang LV Lin-Hui LI qi-Te qiAO Rui YOU Hai-bo cheN Rui-Jiu H.Sakurai H.Otsu M.Nishimura S.Sakaguchi H.Baba Y.Togano K.Yoneda LI chen WANG Shuo WANG he LI Kuo-Ang Y.Nakayama Y.Kondo S.deguchi Y.Satou K.H.Tshoo School of Physics and State key laboratory of Nuclear Physics and technology Peking UniversityBeijing 100871 RIKEN 2-1HirosawaWakoSaitama 351-0198Japan Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 department of Physics Tokyo Institute of TechnologyJapan School of Physics Seoul National UniversityKorea

Breakup reactions of the double borromean nucleus ^(8)he were measured at 82.3 MeV/u on cH2 and c *** coincident detection of two decaying neutrons and the high performance for neutron cross talk rejection are realized in this *** relative energy spectrum for ^(8)he was reconstructed with good *** spectrum exhibits a structure of two resonant peaks,one at an excitation energy of about 3.0 and the other at about 4.14 MeV,*** larger cross section for the first resonance is observed in comparison to the results reported previously.

关键词： experiment MeV/u spectrum

基于cSNS反角白光中子源的中子俘获反应截面测量技术研究

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物理学报 2021年第22期70卷 28-39页

作者：张奇玮栾广源任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉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

中子俘获反应截面数据在核天体物理研究、先进核能开发中具有非常重要的应用,由于缺乏合适的白光中子源和探测装置,国内在keV能区(1 eV-100 keV)中子俘获反应截面的实验数据几乎是空白.中国原子能科学研究院核数据重点实验室建造了国内... 详细信息

中子俘获反应截面数据在核天体物理研究、先进核能开发中具有非常重要的应用,由于缺乏合适的白光中子源和探测装置,国内在keV能区(1 eV-100 keV)中子俘获反应截面的实验数据几乎是空白.中国原子能科学研究院核数据重点实验室建造了国内第一台γ全吸收型探测装置,由40块BaF_(2)探测器单元组成厚度为15 cm,内半径为10 cm的BaF_(2)晶体球壳,共覆盖了95.2%的立体角.利用升级后的装置在中国散裂中子源的反角白光中子源上建立了中子俘获反应截面在线测量技术.在不规则的φ30 mm中子束斑的实验条件下,完成首次197Au中子俘获反应截面的在线测量,利用加和能谱和多重数分布扣除本底,反演飞行时间谱得到keV能区197Au中子俘获反应截面的实验数据.通过与ENDF评价数据库相关数据的比较,共振峰位置能够很好地吻合,从而验证了测量装置和测量技术的可靠性,为下一步高精度截面数据的获取奠定基础.

关键词： γ全吸收型探测装置中子俘获反应截面中国散裂中子源白光中子源