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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 2.2. 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

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 {2.‑Wen li Wei Xu Tao li Ze‑Bin lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun {2.‑Yu Tang Rong Zhang Han‑Tao {2. 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 {12. Rong {12. Shu‑Bin {12. 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 {2. 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 {2. 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 {2. 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-{2. 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 {2. of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China state key {2. 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 {2. 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

具有低噪声及高线性度的高性能MOCVD-SiN_(x)/AlN/GaN毫米波MIS-HEMTs

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红外与毫米波学报 2024年第2期43卷 200-206页

作者：袁静景冠军王建超汪柳高润华张一川姚毅旭魏珂李艳奎陈晓娟中国科学院微电子研究所高频高压器件与集成研发中心北京100029 中国科学院大学北京100029

文章在超薄势垒AlN/GaN异质结构上采用金属有机化学气相沉积(MOCVD)原位生长SiN_(x)栅介质,成功制备了高性能的SiN_(x)/AlN/GaN金属-绝缘体-半导体高电子迁移率晶体管(MIS-HEMTs)。深能级瞬态谱(DLTS)技术测试SiN_(x)/AlN的界面信息,显... 详细信息

文章在超薄势垒AlN/GaN异质结构上采用金属有机化学气相沉积(MOCVD)原位生长SiN_(x)栅介质,成功制备了高性能的SiN_(x)/AlN/GaN金属-绝缘体-半导体高电子迁移率晶体管(MIS-HEMTs)。深能级瞬态谱(DLTS)技术测试SiN_(x)/AlN的界面信息,显示其缺陷能级深度为0.2.6 eV,俘获截面为3.06×10^(-19)cm^(-2.,提取的界面态密度为10^(10)~10^(12.cm^(-2.eV^(-1),表明MOCVD原位生长的SiN_(x)可以有效降低界面态。同时器件表现出优越的直流、小信号和噪声性能。栅长为0.15μm的器件在2.V的栅极电压(Vgs)下具有2.2.A/mm的最大饱和输出电流,峰值跨导为506 mS/mm,最大电流截止频率(fT)和最大功率截止频率(fMAX)分别达到了65 GHz和12. GHz,40 GHz下的最小噪声系数(NFmin)为1.07 dB,增益为9.93 dB。Vds=6 V时对器件进行双音测试,器件的三阶交调输出功率(OIP3)为32.6 dBm,OIP3/Pdc达到11.2.dB。得益于高质量的SiN_(x)/AlN界面,SiN_(x)/AlN/GaN MISHEMT显示出了卓越的低噪声及高线性度,在毫米波领域具有一定的应用潜力。

关键词： SiN_(x)栅介质 MOCVD MIS-HEMTs 界面态低噪声线性度毫米波

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,1989–2.89 keV for this work)with a factor of 2..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^(2.)yr(90%C.L.),corresponding to the upper limits on the effective Majorana neutrino mass:2.7.5 eV.

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

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 {2. 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,2.15)and the Conceptual Design Report(CDR,2.18),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 2.2.-2.2.,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2.30s.

关键词： initiated exceeding precise

AMS Measurement of ^(53)Mn at CIAE

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Chinese Physics Letters 2011年第7期28卷 69-72页

作者： DONG ke-Jun HE Ming li chao-li HU Hao liu Guang-Shan CHEN Zhi-Gang li Zhen-Yu WU Shao-Yong liu jian-Cheng YOU Qu-Bo JIN Chun-Sheng wang xiang-gao SHEN Hong-Tao GUAN Yong-jing YUAN jian jianG Shan china Institute of Atomic Energy P.O.Box 275(50)Beijing 102413 College of Oceanography and environmental Science Xiamen UniversityXiamen 361005 College of Physics Science and technology Guangxi UniversityNanning 530004 College of Physics and technology Guangxi Normal UniversityGuilin 541004

The long-lived isotope ^(53)Mn cosmogenically produced in situ is a very useful indicator for geochronological dating.A new ^(53)Mn accelerator−mass-spectrometry(AMS)measurement method is developed based on the HI-13 Tandem Accelerator andΔE−Q3D detection system at china Institute of Atomic *** performance of ^(53)Cr isobar separation and suppression is tested by a series of ^(53)Mn standards and commercial MnO *** results show that theΔE−Q3D detection system brought about an overall suppression factor of more than 107 for the interfering isobar ^(53)Cr.

关键词： system separation Q3D

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 {2. 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 2.2. April 2. 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

Catheter ablation versus medical therapy for atrial fibrillation with prior stroke history:a prospective propensity score-matched cohort study

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Journal of Geriatric Cardiology 2023年第10期20卷 707-715,I0006页

作者： Wen-li DAI Zi-Xu ZHAO chao jianG {2. HE ke-Xin YAO Yu-Feng wang Ming-Yang gao Yi-Wei LAI jing-Rui ZHANG Ming-Xiao li Song ZUO Xue-Yuan GUO Ri-Bo TANG Song-Nan li Chen-Xi jianG Nian {2. De-Yong LONG Xin DU Cai-Hua SANG jian-zeng DONG Chang-Sheng MA Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityNational Clinical Research Center for Cardiovascular DiseasesBeijingChina Heart Health Research Center BeijingChina Department of Cardiovascular Medicine the First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina

BACKGROUND Patients with atrial fibrillation(AF)and prior stroke history have a high risk of cardiovascular events despite anticoagulation *** is unclear whether catheter ablation(CA)has further benefits in these *** AF patients with a previous history of stroke or systemic embolism(SE)from the prospective Chinese Atrial Fibrillation Registry study between August 2.11 and December 2.2. were included in the *** were matched in a 1:1 ratio to CA or medical treatment(MT)based on propensity *** primary outcome was a composite of all-cause death or ischemic stroke(IS)/*** During a total of 4.1±2.3 years of follow-up,the primary outcome occurred in 111 patients in the CA group(3.3 per 100 person-years)and in 2.9 patients in the MT group(5.7 per 100 person-years).The CA group had a lower risk of the primary outcome compared to the MT group[hazard ratio(HR)=0.59,95%CI:0.47–0.74,P1].There was a significant decreasing risk of all-cause mortality(HR=0.43,95%CI:0.31–0.61,P1),IS/SE(HR=0.73,95%CI:0.54–0.97,P=0.033),cardiovascular mortality(HR=0.32.95%CI:0.19–0.54,P1)and AF recurrence(HR=0.33,95%CI:0.30–0.37,P1)in the CA group compared to that in the MT *** analysis generated consistent results when adjusting for time-dependent usage of *** In AF patients with a prior stroke history,CA was associated with a lower combined risk of all-cause death or IS/*** clinical trials are warranted to confirm the benefits of CA in these patients.

关键词： prospective fibrillation matched