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中国实用内科杂志 2007年第S1期27卷 144-145页

作者： zhang xi chen xing-hua gao lei si ying-jian liu yao gao li cheng zhang peiyan kong

This work was funded from National Natural Science Foun-dation of China(No.39770335 and No.30070327)andChongqing Medical Key construction ***:Ob-jective To establish the experimental foundation for furtherstudying the... 详细信息

关键词： gene Experimental study of human umbilica cord blood stromal cells transfected with recombinant adenoviral vector co-expressing VCAM-1

The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： xiao-Yun Zhao Shao-lin xiong xiang-Yang Wen xin-Qiao li Ce Cai Shuo xiao Qi Luo Wen-xi Peng Dong-Ya Guo Zheng-hua An Ke Gong Jin-Yuan liao Yan-Qiu zhang Yue huang Lu li xing Wen Fei zhang Jing Duan chen-Wei Wang Dong-li Shi Peng zhang Qi-Bin Yi Chao-Yang li Yan-Bing Xu xiao-hua liang Ya-Qing liu Da-li zhang xi-lei Sun Fan zhang Gang chen huan-Yu Wang Sheng Yang xiao-Jing liu Min gao Mao-Shun li Jin-Zhou Wang xing Zhou Yi Zhao Wang-chen Xue Chao Zheng Jia-Cong liu xing-Bo Han Jin-ling Qi Jia huang Ke-Ke zhang Can chen xiong-Tao Yang Dong-Jie Hou Yu-Sa Wang Rui Qiao xiang Ma xiao-Bo li Ping Wang xin-ying Song li-Ming Song Shi-Jie Zheng Bing li Hong-Mei zhang Yue Zhu Wei chen jian-jian He Zhen zhang Jin Hou Hong-Jun Wang Yan-Chao Hao xiang-Yu Wang Zong-Yuan Yang Zhi-Long Wen Zhi Chang Yuan-Yuan Du Rui gao xiao-Fei Lan Yan-Guo li Gang li Xu-Fang li Fang-Jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan zhang Chao-Yue zhang cheng-Mo zhang Zhi-cheng Tang cheng cheng 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 School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

Searching for^(76)Ge neutrinoless double beta decay with the CDEX-1B experiment

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Chinese Physics C 2024年第10期48卷 11-22页

作者： Bing-Tao zhang Jun-Zheng Wang li-Tao Yang Qian Yue Ke-Jun Kang Yuan-Jing li Hai-Peng An C.Greeshma jian-Ping Chang Yun-huan chen jian-Ping cheng Wen-Han Dai Zhi Deng Chang-Hao Fang xin-Ping Geng Hui Gong Qiu-Ju Guo Xu-Yuan Guo li He Sheng-Ming He Jin-Wei Hu Han-xiong huang Tu-chen huang Hai-Tao Jia xi jiang S.Karmakar Hao-Bin li jian-Min li Jin li Qian-Yun li Ren-Ming-Jie li Xue-Qian li Yu-Lan li Yi-Fan liang Bin liao Fong-Kay lin Shin-Ted lin Jia-Xuan liu Shu-Kui liu Yan-Dong liu Yu liu Yuan-Yuan liu Zhong-Zhi liu Hao Ma Yu-Cai Mao Qi-Yuan Nie Jin-hua Ning Hui Pan Ning-Chun Qi Jie Ren xi-Chao Ruan Ze She Manoj Kumar singh Tian-xi Sun Chang-jian Tang Wei-You Tang Yang Tian Guang-Fu Wang li Wang Qing Wang Yu-Feng Wang Yun-xiang Wang Henry-Tsz-King Wong Shi-Yong Wu Yu-cheng Wu Hao-Yang xing Rui Xu Yin Xu Tao Xue Yu-Lu Yan Nan Yi Chun-Xu Yu Hai-Jun Yu jian-Feng Yue Ming Zeng Zhi Zeng Feng-Shou zhang lei zhang Zhen-hua zhang Zhen-Yu zhang Kang-Kang Zhao Ming-Gang Zhao Ji-Fang Zhou Zu-ying Zhou Jing-Jun Zhou Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084 Department of Physics Tsinghua UniversityBeijing 100084 Institute of Physics Academia SinicaTaipei 11529 NUCTECH Company Beijing 100084 YaLong River Hydropower Development Company Chengdu 610051 College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875 College of Physics Sichuan UniversityChengdu 610065 School of Physics Peking UniversityBeijing 100871 Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413 sino-French Institute of Nuclear and Technology Sun Yat-sen UniversityZhuhai 519082 School of Physics Nankai UniversityTianjin 300071 Department of Physics Banaras Hindu UniversityVaranasi 221005 Department of Physics Beijing Normal UniversityBeijing 100875

We operated a p-type point contact high purity germanium(PPCGe)detector(CDEX-1B,1.008 kg)in the China Jinping Underground Laboratory(CJPL)for 500.3 days to search for neutrinoless double beta(0νββ)decay of^(76)Ge.A total of 504.3 kg⋅day effective exposure data was *** anti-coincidence and the multi/single-site event(MSE/SSE)discrimination methods were used to suppress the background in the energy region of interest(ROI,1989–2089 keV for this work)with a factor of 23.A background level of 0.33 counts/(keV⋅kg⋅yr)was *** lower limit on the half life of^(76)Ge 0νββdecay was constrained as T_(1/2)^(0ν)>1.0×10^(23)yr(90%C.L.),corresponding to the upper limits on the effective Majorana neutrino mass:<3.2–7.5 eV.

关键词： neutrinoless double beta decay CDEX point-contact germanium detector ^(76)Ge

Transformation of Anaplastic Large Cell Lymphoma to High-grade Diffuse Large B-cell Ymphoma:Remission after Pegylated liposomal Doxorubicin and Rituximab Immunotherapy

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中国实用内科杂志 2007年第S1期27卷 74-75页

作者： gao lei chen xing-hua zhang xi PENG xian-gui gao li liu yao si ying-jian zhang cheng WANG Qing-yu

Summary:We demonstrate the usefulness of pegylated liposomal doxorubicin (PL-doxorubicin) combine with CD20 antibody Rituximab in a case of transformation of anaplastic large cell lymphoma (ALCL) to high-grade diffuse large B-cell lymphoma (B-DLCL).Case report:A 63-year-old woman suffering from anaplastic large cell lymphoma(stage Ⅳ a) since 2004 showed mediastinal relapse despite of 4 cyclesof chemotherapy following the

关键词： cell Cell Transformation of Anaplastic Large Cell Lymphoma to High-grade Diffuse Large B-cell Ymphoma high MTX

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

The Chromosome-Level Reference Genome of Tea Tree Unveils Recent Bursts of Nonautonomous LTR Retrotransposons in Driving Genome size Evolution

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Molecular Plant 2020年第7期13卷 935-938页

作者： Qun-Jie zhang Wei L i Kui li Hong Nan Cong Shi Yun zhang zhang-Yan Dai Yang-lei lin xiao-Lan Yang Yan Tong Dan zhang Cui Lu li-ying Feng chen-Feng Wang xiao-xin liu jian-An huang Wen-Kai jiang xing-hua Wang xing-Cai zhang Evan E.Eichler Zhong-hua liu and li-Zhi gao Institution of Genomics and Bioinformatics South China Agricultural UniversityGuangzhou 510642China Novogene Bioinformatics Institute Building 301Zone A10 Jiuxianqiao North RoadChaoyang DistrictBeijing 100083China School of life Sciences Nanjing UniversityNanjing 210023China Plant Germplasm and Genomics Center Kunming Institute of BotanyChinese Academy of SciencesKunming 650204China University of the Chinese Academy of Sciences Beijing 100039China Agro-biological Gene Research Center Guangdong Academy of Agricultural SciencesGuangzhou510640China Hunan Agricultural University Changsha 410128China Yunnan Pu’er Tea Tree Breeding Station No.212 Zhenxing AvenueSimao DistrictPu ErYunnan 665099China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Howard Hughes Medical Institute University of WashingtonSeattleWA 98195USA

Dear Editor,The tea tree Camellia sinensis,a member of the genus Camellia in the Theaceae family,includes two major cultivated varieties,*** ***(CSA\Assam type)and *** ***(CSS;Chinese type)(Ming and Bartholomew,2007).Due to the high economic importance of the tea tree,considerable efforts have been made to explore genetic basis of the biosynthesis of natural metabolites that determine health benefits and diverse tea flavors(Shi et al.,2011;li et al.,2011;li et al.,2015;xia et aL,2017;liu et al.,2019).

关键词： Evolution Tree Reference

Construction of Neotype Drug-Resistant Model mediated By Adhesion of LeukemicBone Marrow Stromal Cells and its Effection on Drug Resistance of Jurkat Cell lines

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中国实用内科杂志 2007年第S1期27卷 75-75页

作者： gao lei chen xing-hua zhang xi WANG Ji-gang PENG xian-gui gao li liu yao si ying-jian zhang cheng WANG Qing-yu

Abstract It has been discovered that the adhesion between tumor cells and surrounding microenvironment associates withdrug *** mechanism plays a pivotal role in drug resistance of hematological tumor *** cultured Jurkat celladhering with acute lymphocyte leukemia bone marrow stromalcells (BMSCs) radiated by 60Co to construct the model of

关键词： DNR BMSCs

Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng Zhao Dong li Shao-lin xiong Yan-Qiu zhang Yang Su Wei chen Yi Zhao xiao-Bo li Jia-Cong liu Wen-xi Peng Rui Qiao xin-Qiao li xiang-Yang Wen li-Ming Song Shi-Jie Zheng xin-ying Song xiao-Yun Zhao Yue huang Shuang-Nan zhang Shuo xiao Ce Cai Zheng-hua An Can chen Gang chen Wei chen Yan-Qi Du Min gao Ke Gong Dong-Ya Guo Zhi-Wei Guo jian-jian He Bin li Chao li Chao-Yang li Gang li jian-Hui li Lu li Qing-xin li Yan-Guo li Jing liang xiao-hua liang Jin-Yuan liao xiao-Jing liu Ya-Qing liu Qi Luo xiang Ma Bin Meng Ge Ou Dong-li Shi Jing-Yan Shi Gong-xing Sun xi-lei Sun You-li Tuo chen-Wei Wang Hui Wang Jin Wang Jin-Zhou Wang Ping Wang Wen-Shuai Wang Hong Wu Sheng-Lun xie Yan-Bing Xu Yu-Peng Xu Wang-chen Xue Sheng Yang Min yao jian-ying Ye Qi-Bin Yi Chao-Yue zhang Da-li zhang Fan zhang Fei zhang Hong-Mei zhang Kai zhang Peng zhang xiao-Lu zhang Zhen zhang Guo-ying Zhao Shi-Yi Zhao Chao Zheng xing Zhou Yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and Space Science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

急性白血病骨髓基质细胞Connexin 43的表达及细胞间通讯功能研究

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中国实验血液学杂志 2007年第4期15卷 679-682页

作者：刘耀张曦司英健高蕾高力陈幸华第三军医大学新桥医院血液科重庆400037

本研究探讨急性白血病和正常骨髓基质细胞中连接蛋白43(connexin 43, Cx43)的表达及细胞间隙连接通讯(gap junction intercellular communication, GJIC)功能的变化及二者细胞通讯功能之间的差异。体外培养正常及急性白血病骨髓基质细胞... 详细信息

本研究探讨急性白血病和正常骨髓基质细胞中连接蛋白43(connexin 43, Cx43)的表达及细胞间隙连接通讯(gap junction intercellular communication, GJIC)功能的变化及二者细胞通讯功能之间的差异。体外培养正常及急性白血病骨髓基质细胞,采用细胞免疫组织化学方法及计算机灰度检测观察二者之间Cx43表达的变化,采用细胞划痕染料传输技术比较两者之间GJIC功能的差异。结果显示,体外培养的急性白血病骨髓基质细胞Cx43的表达较正常骨髓基质细胞Cx43的表达明显减低,GJIC功能减弱。结论:急性白血病骨髓基质细胞间通讯功能较正常骨髓基质细胞明显减低。

关键词： Cx43 GJIC 急性白血病骨髓基质细胞

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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