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Interfacial state induced ultrasensitive ultraviolet light photodetector with resolved flux down to 85 photons per second

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Nano Research 2015年第4期8卷 1098-1107页

作者： Yong-Qiang yu lin-Bao luo Ming-Zheng Wang Bo Wang Long-Hui zeng Chun-Yan Wu Jian-Sheng Jie Jian-Wei liu li Wang Shu-Hong yu School of Electronic Science and Applied Physics Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices Hefei University of Technology Hefei Anhui 230009 China Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou Jiangsu 215123 China Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry University of Science and Technology of China Hefei 230026 China

We present an ultrasensitive ultraviolet （UV） detector based on a p-type ZnS nanoribbon （NR）/indium tin oxide （ITO） Schottky barrier diode （SBD）. The device exhibits a pseudo-photovoltaic behavior which can allow the SBD to detect UV light irradiation with incident power of 6 × 10^-17 W （-85 photons/s on the NR） at room temperature, with excellent reproducibility and stability. The corresponding detectivity and photoconductive gain are calculated to be 3.1 × 10^20 ***1/2.W^-1 and 6.6 × 10^5, respectively. It is found that the presence of the trapping states at the p-ZnS NWITO interface plays a crucial role in determining the ultrahigh sensitivity of this nanoSBDs. Based on our theoretical calculation, even ultra-low photon fluxes on the order of several tens of photons could induce a significant change in interface potential and consequently cause a large photocurrent variation. The present study provides new opportunities for developiphigh-performance optoelectronic devices in the future.

关键词： II-VI group detectivity Schottky barrier diode optoelectronic device interfacial states

STCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He Y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.li C.li D.Y.li F.li G.li G.li H.B.li H.li H.N.li H.J.li H.L.li J.M.li J.li L.li L.li L.Y.li N.li P.R.li R.H.li S.li T.li W.J.li X.li X.H.li X.Q.li X.H.li Y.li Y.Y.li Z.J.li H.liang J.H.liang Y.T.liang G.R.liao L.Z.liao Y.liao C.X.lin D.X.lin X.S.lin B.J.liu C.W.liu D.liu F.liu G.M.liu H.B.liu J.liu J.J.liu J.B.liu K.liu K.Y.liu K.liu L.liu Q.liu S.B.liu T.liu X.liu Y.W.liu Y.liu Y.L.liu Z.Q.liu Z.Y.liu Z.W.liu I.Logashenko Y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.luo T.luo X.F.luo Y.H.luo H.J.Lyu X.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

Efficient expansion of rare human circulating hematopoietic stem/progenitor cells in steady-state blood using a polypeptide-forming 3D culture

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Protein & Cell 2022年第11期13卷 808-824页

作者： yulin Xu Xiangjun zeng Mingming Zhang Binsheng Wang Xin Guo Wei Shan Shuyang Cai Qian luo Honghu li Xia li Xue li Hao Zhang limengmeng Wang yu lin lizhen liu Yanwei li Meng Zhang Xiaohong yu Pengxu Qian He Huang Bone Marrow Transplantation Center First Affiliated HospitalZhejiang University School of MedicineHangzhou 310012China liangzhu Laboratory Zhejiang University Medical CenterHangzhou 311121China Institute of Hematology Zhejiang UniversityHangzhou 310012China Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy Hangzhou 310012China Core Facilities Zhejiang University School of MedicineHangzhou 310012China Dr.li Dak Sum&Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang UniversityHangzhou 310012China

Although widely applied in treating hematopoietic malignancies,transplantation of hematopoietic stem/progenitor cells(HSPCs)is impeded by HSPC *** circulating HSPCs(cHSPCs)in steady-state blood could be used as an alternative source remains largely *** we develop a three-dimensional culture system(3DCS)including arginine,glycine,aspartate,and a series of ***-day culture of peripheral blood mononuclear cells(PBMNCs)in 3DCS led to 125-and 70-fold increase of the frequency and number of CD34+***,3DCS-expanded cHSPCs exhibited the similar reconstitution rate com-pared to CD34+HSPCs in bone ***,3DCS fabricated an immunomodulatory niche,secreting cytokines as TNF to support cHSPC survival and ***,3DCS could also promote the expansion of cHSPCs in patients who failed in HSPC *** 3DCS successfully expands rare cHSPCs,providing an alternative source for the HSPC therapy,particularly for the patients/donors who have failed in HSPC mobilization.

关键词： hematopoietic stem/progenitor cell transplantation peripheral blood mononuclear cells expansion mobilization three-dimensional culture selfrenewal and multilineage differentiation

沙丁鱼鱼鳞胶原蛋白肽的制备及其抗氧化活性研究

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食品安全质量检测学报 2024年第3期15卷 214-224页

作者：曾丽琴陈雅茹刘淑集张玉苍陈晓婷苏永昌罗联钰刘智禹福建农林大学食品科学学院闽台特色海洋食品加工及营养健康教育部工程研究中心福州350002 福建省水产研究所国家海水鱼类加工技术研发分中心(厦门)福建省海洋生物增养殖与高值化利用重点实验室福建省海洋生物资源开发利用协同创新中心厦门361013 集美大学食品与生物工程学院厦门361000 福建省深蓝生物科技有限公司福州350000

目的优化沙丁鱼(Sardinapilchardus)鱼鳞胶原蛋白肽的制备工艺和评价不同分子量大小胶原蛋白肽的抗氧化活性。方法以沙丁鱼鱼鳞为原料,通过酶工程结合单因素与响应面实验优化胶原蛋白肽制备工艺,采用超滤膜分级分离鱼鳞胶原蛋白肽,并通... 详细信息

目的优化沙丁鱼(Sardinapilchardus)鱼鳞胶原蛋白肽的制备工艺和评价不同分子量大小胶原蛋白肽的抗氧化活性。方法以沙丁鱼鱼鳞为原料,通过酶工程结合单因素与响应面实验优化胶原蛋白肽制备工艺,采用超滤膜分级分离鱼鳞胶原蛋白肽,并通过体外自由基化学体系分析对比不同分子量大小(10、5、1 kDa)的胶原蛋白肽的抗氧化活性。结果采用碱性蛋白酶进行酶解鱼鳞,胶原蛋白肽的得率最高;最优酶解工艺参数为:碱性蛋白酶加酶量7526 U/g、料液比1:20(g/mL)、pH 10.5、酶解温度67℃、酶解时间4 h,此条件下鱼鳞胶原蛋白肽得率最高,达43.44%±1.59%。通过超滤获得的分子量小于1k Da的鱼鳞胶原蛋白肽对1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基和羟基自由基(hydroxyl radical,·OH)的清除能力最强,其半抑制浓度(half maximal inhibitory concentration,IC_(50))分别为0.72 mg/mL和1.76 mg/mL;分子量为1~5 kDa的鱼鳞胶原蛋白肽对超氧阴离子自由基(superoxide radical,O^(2-)·)的清除效果最好,其IC50为1.45 mg/mL。结论碱性蛋白酶能够有效制备鱼鳞胶原蛋白肽,且小于1 kDa的鱼鳞胶原蛋白肽抗氧化活性最好。

关键词：沙丁鱼鱼鳞胶原蛋白肽蛋白酶膜分离抗氧化活性

Real-world investigation of the efficacy and safety of secukinumab for psoriasis treatment in a Chinese population

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Chinese Medical Journal 2021年第1期134卷 117-119页

作者： jing-Xin zeng Quan luo Ju Wen Xin Tian Xin Zhou Wei li Ya-Ping Tang San-Quan Zhang Wei-yu liu Hui-Lan Zhu Xi-Bao Zhang Department of Dermatology Guangdong Second Provincial General HospitalGuangzhouGuangdong 510317China Department of Dermatology Guangzhou Institute of DermatologyGuangzhouGuangdong 510095China

To the Editor:Psoriasis is a chronic inflammatory proliferative disease mediated by T lymphocytes under a multi-gene genetic background.[1]Moreover,its pathogenesis is not fully *** research shows that T cell-mediated immune inflammation plays a key role in the pathophysiology of psoriasis,and its most common downstream mediator,interleukin(IL)-17,is the primary effector cytokine in this *** is a high-affinitive,fully humanized,G1κmonoclonal antibody that can simultaneously block IL-17A from multiple sources.[2]In a global,core,phase III trial,secukinumab was confirmed to rapidly improve psoriasis symptoms;however,the efficacy of its use in Chinese population remains *** study was performed in a Chinese population for a period of 16 weeks to explore the efficacy and safety of secukinumab after its introduction in clinical settings in May 2019.

关键词： psoriasis secukinumab inflammation

Crucial control measures to contain China's first Delta variant outbreak

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National Science Review 2022年第4期9卷 41-50页

作者： Lei luo Zifeng Yang jingyi liang yu Ma Hui Wang Chitin Hon Mei Jiang Zhengshi lin Wenda Guan Zhitong Mai Yongming li Kailin Mai Zhiqi zeng Chuanmeizi Tu Jian Song Bin liu Yong liu Jianfeng He Huiyuan li Bosheng li Hang Dong yutian Miao Shujun Fan lirui Fan Xingyi liang Ke li Chun Chen Huihong Deng Zhicong Yang Nanshan Zhong Institute of Public Health Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases Department of Urban and Rural Planning Shunde Urban and Rural Planning Information Research Center Guangzhou Laboratory Bio-Island State Key Laboratory of Quality Research in Chinese Medicine Macau Institute for Applied Research in Medicine and HealthMacau University of Science and Technology Kingmed Virology Diagnostic & Translational Center Guangzhou Kingmed Center for Clinical Laboratory Co.Ltd State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory Healththe First Affiliated Hospital of Guangzhou Medical University Guangdong Center for Disease Control and Prevention Macau Institute of Systems Engineering Macau University of Science and Technology

The SARS-C oV-2 B.1.617.2(Delta) variant flared up in late May in Guangzhou,*** characteristics of Delta variant were analysed for 153 confirmed cases and two complete transmission chains with seven generations were fully presented.A rapid transmission occurred in five generations within10 *** basic reproduction number(R) was 3.60(95% confidence interval:2.50-5.30).After redefining the concept of close contact,the proportion of confirmed cases discovered from close contacts increased from 43% to 100%.With the usage of a yellow health code,the potential exposed individuals were self-motivated to take a nucleic acid test and regained public access with a negative testing *** the massive requirement of screening,novel facilities like makeshift inflatable laboratories were promptly set up as a vital supplement and 17 cases were found,with 1 *** dynamic adjustment of these three interventions resulted in the decline of Rt from 5.00 to 1.00 within 9 *** breaking the transmission chain and eliminating the transmission source through extending the scope of the close-contact tracing,health-code usage and mass testing,the Guangzhou D elta epidemic was effectively contained.

关键词： COVID-19 public health control measure close contact mass testing

Single-cell brain atlas of Parkinson's disease mouse model

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Journal of Genetics and Genomics 2021年第4期48卷 277-288页

作者： Jixing Zhong Gen Tang Jiacheng Zhu Weiying Wu Ge li Xiumei lin Langchao liang Chaochao Chai yuying zeng Feiyue Wang lihua luo Jiankang li Fang Chen Zhen Huang Xiuqing Zhang yu Zhang Hongde liu Xin Qiu Shengping Tang Dongsheng Chen School of Biological Science&Medical Engineering Southeast UniversityNanjing 210096China BGI-Shenzhen Shenzhen 518083China Shenzhen Children's Hospital Shenzhen 518083China BGI Education Center University of Chinese Academy of SciencesShenzhen 518083China Department of Neurobiology NHC and CAMS Key Laboratory of Medical NeurobiologySchool of Brain Science and Brian MedicineAnd the MOE Frontier Science Center for Brain Research and Brain-Machine IntegrationZhejiang University School of MedicineHangzhou 310012China Guangdong Provincial Key Laboratory of Laboratory Animals Guangdong Laboratory Animals Monitoring InstituteGuangzhouGuangdong 510663China MGI BGI-ShenzhenShenzhen 518083China life Science College Fujian Normal UniversityFuzhou 350108China Key Laboratory of Special Marine Bio-resources Sustainable Utilization of Fujian Province Fuzhou 350108China

Parkinson's disease(PD)is a neurodegenerative disease,leading to the impairment of movement *** pathogenesis has been largely investigated,either limited to bulk transcriptomic levels or at certain cell types,which failed to capture the cellular heterogeneity and intrinsic interplays among distinct cell ***,we report the application of single-nucleus RNA-seq on midbrain,striatum,and cerebellum of theα-syn-A53 T mouse,a well-established PD mouse model,and matched controls,generating the first single cell transcriptomic atlas for the PD model mouse brain composed of 46,174 individual ***,we comprehensively depicte the dysfunctions in PD pathology,covering the elevation of NF-k B activity,the alteration of ion channel components,the perturbation of protein homeostasis network,and the dysregulation of glutamatergic ***,we identify a variety of cell types closely associated with PD risk *** together,our study provides valuable resources to systematically dissect the molecular mechanism of PD pathogenesis at the single-cell resolution,which facilitates the development of novel approaches for diagnosis and therapies against PD.

关键词： Parkinson’s disease α-syn-A53T Single-nucleus RNA-Seq Pathogenesis Neuroinflammtion

Functional characterization of novel NPRL3 mutations identified in three families with focal epilepsy

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中国科学:生命科学英文版 2023年第9期66卷 2152-2166页

作者： Shiyue Du Sheng zeng li Song Hongying Ma Rui Chen Junyu luo Xu Wang Tingbin Ma Xuan Xu Hao Sun Ping Yi Jifeng Guo Yaling Huang Mugen liu Tao Wang Wei-Ping liao luoying Zhang jing yu liu Beisha Tang Key Laboratory of Molecular Biophysics of Ministry of Education College of Life Science and TechnologyHuazhong University of Science and Technology(HUST)Wuhan 430074China Department of Neurology Xiangya HospitalCentral South UniversityChangsha 410008China Department of Geriatrics The Second Xiangya HospitalCentral South UniversityChangsha 410011China National Reference Laboratory of Veterinary Drug Residues and MAO Key Laboratory for Detection of Veterinary Drug Residues Huazhong Agricultural UniversityWuhan 430070China Institute of Neuroscience State Key Laboratory of NeuroscienceCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Department of Neurology Union Hospital of HUSTWuhan 430022China Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of ChinaGuangzhou Medical UniversityGuangzhou 510260China Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan 430022China Key Laboratory of Hunan Province in Neurodegenerative Disorders Central South UniversityChangsha 410008China

Focal epilepsy accounts for 60% of all forms of epilepsy, but the pathogenic mechanism is not well understood. In this study,three novel mutations in NPRL3(nitrogen permease regulator-like 3), c.937_945del, c.1514dup C and 6,706-bp genomic DNA(g DNA) deletion, were identified in three families with focal epilepsy by linkage analysis, whole exome sequencing(WES) and Sanger sequencing. NPRL3 protein is a component of the GATOR1 complex, a major inhibitor of m TOR signaling. These mutations led to truncation of the NPRL3 protein and hampered the binding between NPRL3 and DEPDC5, which is another component of the GATOR1 complex. Consequently, the mutant proteins enhanced m TOR signaling in cultured cells, possibly due to impaired inhibition of m TORC1 by GATOR1. Knockdown of nprl3 in Drosophila resulted in epilepsy-like behavior and abnormal synaptic development. Taken together, these findings expand the genotypic spectrum of NPRL3-associated focal epilepsy and provide further insight into how NPRL3 mutations lead to epilepsy.

关键词： focal epilepsy NPRL3 GATOR1 mTOR abnormal synaptic development

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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