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大豆巢式关联作图(NAM)群体构建及花色和种皮色遗传分析

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作物学报 2024年第3期50卷 556-575页

作者：宋健熊亚俊陈伊洁徐瑞新刘康林郭庆元洪慧龙高华伟谷勇哲张丽娟郭勇阎哲刘章雄关荣霞李英慧王晓波郭兵福孙如建闫龙王好让姬月梅常汝镇王俊邱丽娟长江大学湖北荆州434025 中国农业科学院作物科学研究所/农作物基因资源与遗传改良国家重大科学工程/农业农村部北京大豆生物学重点实验室北京100081 安徽农业大学农学院安徽合肥230036 江西省农业科学院作物研究所江西南昌330200 呼伦贝尔市农业科学研究所内蒙古呼伦贝尔162650 农业农村部长江中游作物绿色高效生产重点实验室(部省共建)/长江大学农学院湖北荆州434025 河北省农林科学院粮油作物研究所河北石家庄050035 江苏徐怀地区徐州农业科学研究所江苏徐州210031 宁夏农林科学院作物研究所宁夏银川750021

巢式关联作图(Nested Association Mapping,NAM)群体在作物学遗传与育种研究中具有广泛的应用。本研究在前期大豆种质资源评价基础上,利用35份不同地区来源的代表性种质与中豆41(公共母本)杂交,构建了一套大豆NAM群体。PCA和聚类分析发... 详细信息

巢式关联作图(Nested Association Mapping,NAM)群体在作物学遗传与育种研究中具有广泛的应用。本研究在前期大豆种质资源评价基础上,利用35份不同地区来源的代表性种质与中豆41(公共母本)杂交,构建了一套大豆NAM群体。PCA和聚类分析发现,不同亲本组合的RIL群体基本聚在一起,显示出清晰的遗传结构。利用该NAM群体亲本间花色和种皮色具有显著差异的RIL群体进行全基因组关联分析,定位到1个主要位点qFC13-1与花色显著关联,该位点与W1位点重合;定位到12个位点与种皮色显著相关,其中9个位点为3种以上方法共定位,3个位点为2种方法共定位,包括4个已知位点和8个新位点。研究结果表明,构建的NAM群体适于进行大豆相关性状遗传分析,为大豆复杂性状的遗传解析和育种实践提供了良好的基础材料。

关键词：大豆 NAM群体花色种皮色遗传分析

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

胸骨下段小切口与全胸骨切口OPCABG术治疗三支病变血管通畅率对比

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中华胸心血管外科杂志 2018年第1期34卷 46-47页

作者：贾彦雄苏丕雄高杰刘岩张希涛顾松颜钧首都医科大学附属北京朝阳医院心外科 100020

与常规胸骨正中切口不停跳冠状动脉旁路移植术（ OP-CABG）相比,胸骨下段小切口OPCABG创伤小,可保持胸廓部分完整,成为冠状动脉三支血管病变主要手术方式之一[1-2]. CTCA在评估冠状动脉旁路移植术（CABG）移植血管通畅性上具有良好特异... 详细信息

与常规胸骨正中切口不停跳冠状动脉旁路移植术（ OP-CABG）相比,胸骨下段小切口OPCABG创伤小,可保持胸廓部分完整,成为冠状动脉三支血管病变主要手术方式之一[1-2]. CTCA在评估冠状动脉旁路移植术（CABG）移植血管通畅性上具有良好特异性及敏感性[3-4]. 本研究对两种不同切口OPCABG治疗冠状动脉三支血管病变术后2年移植血管通畅率进行随访,报道如下.

关键词：胸骨下段小切口 OPCABG 血管通畅率胸骨切口不停跳冠状动脉旁路移植术 CABG术三支病变治疗

腔镜获取大隐静脉在糖尿病患者心脏不停跳冠状动脉旁路移植术的应用

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中华胸心血管外科杂志 2016年第3期32卷 159-161页

作者：张希涛高杰刘岩顾松颜钧辛悦苏丕雄首都医科大学附属北京朝阳医院心外科 100020

目的探讨合并糖尿病（DM）患者心脏不停跳冠状动脉旁路移植手术（OPCAB）中应用腔镜（EVH）获取大隐静脉（SV）临床效果及相关并发症。方法2011年11月至2014年11月，序列对照分析合并DM患者行OPCAB339例的临床资料，其中采用EVH获取SV26... 详细信息

目的探讨合并糖尿病（DM）患者心脏不停跳冠状动脉旁路移植手术（OPCAB）中应用腔镜（EVH）获取大隐静脉（SV）临床效果及相关并发症。方法2011年11月至2014年11月，序列对照分析合并DM患者行OPCAB339例的临床资料，其中采用EVH获取SV269例，常规全程切开（CVH）获取SV70例，观察两组患者围手术期病死率、术中SV弃用率、术中大隐静脉旁路血管（SVG）血流量及PI值，术后切口感染、愈合不良、下肢局部血肿、下肢伤口疼痛等并发症发生率，CT冠状动脉造影随访两组部分患者近、中期SVG通畅率。结果围手术期死亡EVH组8例（2．4％），CVH组2例（2．9％）；术中SV弃用率EVH组3．9％，CVH组2．9％；术中SVG整个心动周期的平均血流量EVH组（17．36±11．24）ml／min，CVH组（17．11±8．37）ml／min；PI值EVH组2．78±2．37，CVH组2．22±2．17；术后切口感染率EVH组0，CVH组4．4％；刀口愈合不良率EVH组0．9％，CVH组8．8％；下肢局部血肿率EVH组5．7％，CVH组1．5％；术后3天疼痛视觉类比评分（VAS）EVH组0．53±1．7l，CVH组1．26±2．13；下肢麻木异常感率EVH组9．7％，CVH组22．1％；1周后下肢水肿率EVH组8．5％，CVH组19．1％。术后CT冠状动脉造影随访SVG通畅率，每年两组采用抽签法随机选择20例患者，EVH组60例107支SVG，CVH组60例112支SVG，通畅率分别为1年（91．4％对94．6％）、2年（83．3％对86．1％）、3年（72．2％对73．7％）。结论合并DM患者OPCAB术中应用EVH获取SVG不影响其近、中期通畅率，下肢并发症减少。

关键词：不停跳冠状动脉旁路移植术腔镜大隐静脉糖尿病

胸骨下段小切口和全胸骨切口OPCABG治疗三支血管病变对比研究

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中华胸心血管外科杂志 2016年第1期32卷 -页

作者：顾松苏丕雄刘岩张希涛颜钧安向光高杰辛悦 100020 首都医科大学附属北京朝阳医院心外科

目的对比研究胸骨下段'L'形小切口微创不停跳冠状动脉旁路移植手术(OPCABG)与常规OPCABG治疗冠心病三支病变的可行性、有效性和安全性.方法 2013年8月至12月期间160例冠状动脉三支血管病变患者,按区组随机化分组为经胸骨下段小切口OPC... 详细信息

目的对比研究胸骨下段'L'形小切口微创不停跳冠状动脉旁路移植手术(OPCABG)与常规OPCABG治疗冠心病三支病变的可行性、有效性和安全性.方法 2013年8月至12月期间160例冠状动脉三支血管病变患者,按区组随机化分组为经胸骨下段小切口OPCABG、全胸骨切口OPCABG两组,每组80例.由同一术者实施手术,术后随访.结果两组围手术期均无死亡,无术中中转体外循环.两组平均旁路血管数量、新发房颤例数差异无统计学意义(P＞0.05).与全胸骨切口组相比,胸骨下段小切口组的平均手术时间、左乳内动脉采集时间、气管插管时间、胸骨切口长度、ICU停留时间、住院天数等指标明显优于前者.另外,胸骨下段小切口组95.0％(76/80)保持了左侧胸膜的完整性,高于全胸骨切口组(75.0％,60/80).胸骨下段小切口组术后24 h心包纵隔引流量为(294.22±124.71) ml,明显少于全胸骨组(407.80±146.97) ml,差异有统计学意义(P=0.04).胸骨下段小切口组输血5例(6.3％),全胸骨组56例(70.0％).术后6个月所有患者均接受冠状动脉CT检查,两组各有4例大隐静脉旁路血管闭塞(6个月通畅率95.0％).随访12～ 16个月期间无患者死亡.结论经胸骨下段小切口OPCABG手术不增加手术病死率及并发症发生率,避免了全胸骨切开,具有脱机拔管早、ICU停留时间短、输血少、住院天数少、恢复快等优势.经胸骨下段小切口OPCABG手术治疗三支血管病变有良好的可行性、有效性及安全性,是微创冠脉旁路移植治疗三支血管病变的有效方法.

关键词：外科手术,微创性冠状动脉旁路移植术,非体外循环三支血管病变

肝素残留在非体外循环冠状动脉旁路移植术围手术期的利弊分析

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中华胸心血管外科杂志 2020年第3期36卷 180-184页

作者：郭大雷刘岩苏丕雄张希涛颜钧顾松高杰郭玉林辛悦王前伟首都医科大学附属北京朝阳医院心脏中心和高血压病研究北京市重点实验室 100020

目的分析非体外循环冠状动脉旁路移植术(OPCABG)术后肝素残留利弊,探讨OPCABG术中鱼精蛋白和肝素的最佳中和比。方法连续性纳入2018年7月至2019年1月112例行择期OPCABG患者,所有患者在手术当日入手术室前和术后返回ICU时检测普通血栓弹... 详细信息

目的分析非体外循环冠状动脉旁路移植术(OPCABG)术后肝素残留利弊,探讨OPCABG术中鱼精蛋白和肝素的最佳中和比。方法连续性纳入2018年7月至2019年1月112例行择期OPCABG患者,所有患者在手术当日入手术室前和术后返回ICU时检测普通血栓弹力图(TEG)、肝素酶纠正的血栓弹力图(hmTEG),同时检测活化凝血时间(ACT)等常规凝血指标。根据术后普通TEG、hmTEG、术后1h、2 h的ACT及术中ACT检测结果分为非肝素残留组(30例)、肝素残留1组(42例)和肝素残留2组(40例)。肝素残留1组:鱼精蛋白中和肝素后,ACT(最大值)高于术前ACT水平且不高于术前水平的20%。肝素残留2组:鱼精蛋白中和肝素后,ACT(最大值)高于术前20%。观察比较各组鱼精蛋白及肝素用量、鱼精蛋白与肝素总量之比、中和后ACT值、术后R值及R(CKH)值、术后12 h、48 h胸腔引流量和输血量、术后cTnI峰值、围手术期心肌梗死发生比例、二次开胸发生比例、急性肾功能不全及伤口愈合不良发生比例等。结果3组患者术前临床资料差异均无统计学意义(P>0.05)。相比肝素残留1组和2组,非肝素残留组的中和后ACT、术后R值减少,鱼精蛋白中和总量、鱼精蛋白/肝素、cTnI峰值升高,差异均有统计学意义(P0.05)。3组患者术后二次开胸止血、心肌梗死、急性肾功能不全、伤口愈合不良等不良事件发生比例、住ICU时间及R(CKH)值等指标比较,差异均无统计学意义(P>0.05)。结论OPCABG术后适度肝素残留初步提示具有心肌保护作用,不明显增加出血风险。大量肝素残留可影响患者凝血功能,导致出血倾向,增加失血量和输血量。鱼精蛋白中和肝素后ACT高于术前水平且不高于术前水平的20%是一种合理的做法,此时鱼精蛋白/肝素值约为2/3。

关键词：肝素鱼精蛋白冠状动脉旁路移植术,非体外循环血栓弹力图

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

Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-Wei yang Yong-Hao Chen Rong liu Bang-Jiao Ye jie Wen Hai-Rui guo Zi-jie Han Qi-Ping Chen Zhong-Wei Wen Wei-Li sun Han Yi xing-yan liu Tao Ye Jiang-Bo Bai Qi An jie Bao Yu Bao Ping Cao Hao-Lei Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing gao Xiao-Long gao Min-Hao gu Chang-Cai Han guo-Zhu He Yong-Cheng He yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-jie Jiang Han-Tao Jing Ling Kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li yang Li jie liu Shu-Bin liu Ze Long guang-Yuan Luan Chang-jun Ning Meng-Chen Niu Bin-Bin Qi jie Ren Xi-Chao Ruan Zhao-Hui song Kang sun Zhi-Jia sun Zhi-xin Tan Jing-Yu Tang xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Xiao-guang Wu Xuan Wu Li-Kun Xie Xiao-Yun yang Li Yu Tao Yu Yong-Ji Yu guo-Hui zhang Lin-Hao zhang Qi-Wei zhang Xian-Peng zhang Yu-Liang zhang Zhi-Yong zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch *** 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV ***^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV *** present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 232Th(n f)cross section Fast-fission ionization chamber Back-n white neutron source

Back-n white neutron source at CSNS and its applications

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Nuclear Science and Techniques 2021年第1期32卷 95-104页

作者： Jing-Yu Tang Qi An Jiang-Bo Bai jie Bao Yu Bao Ping Cao Hao-Lei Chen Qi-Ping Chen Yong-Hao Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing gao Xiao-Long gao Min-Hao gu Chang-Cai Han Zi-jie Han guo-Zhu He Yong-Cheng He yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-jie Jiang Han-Tao Jing Ling Kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li yang Li jie liu Rong liu Shu-Bin liu xing-yan liu Ze Long guang-Yuan Luan Chang-jun Ning Meng-Chen Niu Bin-Bin Qi jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui song Kang sun Zhi-Jia sun Zhi-xin Tan xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-guang Wu Xuan Wu Li-Kun Xie Xiao-Yun yang Yi-Wei yang Han Yi Li Yu Tao Yu Yong-Ji Yu guo-Hui zhang Lin-Hao zhang Qi-Wei zhang Xian-Peng zhang Yu-Liang zhang Zhi-Yong zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-jun Zhu 无 State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China The CSNS Back-n Collaboration

Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March *** Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the *** addition,the excellent energy spectrum spanning from 0.5 eV to 200 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the *** with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional *** article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn.

关键词： White neutron source Nuclear data measurements Experimental setups Neutron applications