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Journal of Materials science & Technology 2012年第7期28卷 666-672页

作者： s.q. deng z.p. xue y.h. yang q. yang y.l. liu Department of Chemistry Jinan University Guangzhou 510632 China

Well dispersed and homogeneous y2O2s：sm3＋ hollow submicrospheres were successfully achieved by a template- free solvothermal method combining with a postcalcining process. The crystalstructure and particle morphology were investigated by the X-ray diffraction （XRD）, Fourier transform infrared （FT-IR） spectra, scanning and transmission electron microscopy （sEM and TEM）, respectively. A possible growth mechanism was proposed to reveal the formation process. luminescence properties of the y202s：sm3＋ long-lasting phosphor were an- alyzed by measuring the excitation spectra, emission spectra, afterglow decay curve and thermoluminescence curve. The excitation spectra indicated that the phosphor could be excited effectively by the ultraviolet-light emitting diode （UV-lED） or blue lED, and the emission spectra showed that the phosphor could emit red light from 600 to 650 nm.

关键词： yttrium oxysulfide hollow submicrosphere luminescence long-lasting phosphor

Effects of chemical pressure on diluted magneticsemiconductor(Ba,K)(zn,Mn)_2As_2

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Chinese physics B 2019年第5期28卷 288-292页

作者： y peng s yu G q.zhao W M li J F zhao l p Cao X C Wang q.q.liu s J zhang R z yu z deng X h zhu C q.Jin College of Materials science & Engineering Sichuan University Beijing National laboratory for Condensed Matter physics and Institute of Physics Chinese Academy of Sciences school of physics University of Chinese Academy of Sciences Collaborative Innovation Center of q.antum Matter

Chemical pressure induced by iso-valent doping has been widely employed to tune physical properties of materials. In this work, we report effects of chemical pressure by substitution of sb or p into As on a recently discovered diluted magnetic semiconductor(Ba,K)(zn,Mn)_2 As_2, which has the record of reliable Curie temperature of 230 K due to independent charge and spin doping. sb and p are substituted into As-site to produce negative and positive chemical pressures, respectively.X-ray diffraction results demonstrate the successful chemical solution of dopants. Magnetic properties of both K-underdoped and K-optimal-doped samples are effectively tuned by sb-and p-doping. The hall effect measurements do not show decrease in carrier concentrations upon sb-and p-doping. Impressively, magnetoresistance is significantly improved from7% to 27% by only 10% p-doping, successfully extending potential application of(Ba,K)(zn,Mn)_2 As_2.

关键词： chemical pressure (Ba,K)(zn,Mn)2As2 diluted magnetic semiconductor iso-valent doping

Anisotropy of the Wear Behavior for Carbon Nanotube-Reinforced 6061Al Composites

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Acta Metallurgica sinica(English letters) 2023年第5期36卷 814-826页

作者： X.N.li J.F.zhang W.h.xue K.Ma p.y.l. z.y.l.u B.l.Xiao D.R.Ni q.z.Wang D.Wang z.y.Ma school of Materials science and Engineering University of Science and Technology of ChinaShenyang110016China shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Carbon nanotube(CNT)-reinforced 6061Al(CNT/6061Al)composites with directionally aligned CNT were fabricated,and their wear behavior was *** results indicate that the wear properties of CNT/6061Al composites exhibited a significant anisotropy.A certain CNT concentrations(1 wt%and 2 wt%)could effectively improve the wear resistance of CNT/6061Al composites along the CNT circumferential and CNT radial directions for the load transfer,grain refinement and self-lubrication effect of *** Brass{011}and{112}textures inhibited the load transfer effect of CNT along the CNT radial direction,resulting in a better wear resistance along CNT circumferential direction than CNT radial *** the CNT axial direction,the weak deformability of composites caused by the intensifyingfiber texture was the main reasons for the poor wear resistance of CNT/6061Al composites with increasing CNT concentration.

关键词： Carbon nanotube Metal matrix composite Wear Anisotropy

The lobster Eye Imager for Astronomy Onboard the sATech-01 satellite

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Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： z.X.ling X.J.sun C.zhang s.l.sun G.Jin s.N.zhang X.F.zhang J.B.Chang F.s.Chen y.F.Chen z.W.Cheng W.Fu y.X.han h.li J.F.li y.l. z.D.li p.R.liu y.h.lv X.h.Ma y.J.Tang C.B.Wang R.J.Xie y.l.xue A.l.yan q.zhang C.y.Bao h.B.Cai h.q.Cheng C.z.Cui y.F.Dai D.W.Fan h.B.hu J.W.hu M.h.huang z.q.Jia C.C.Jin D.y.l. J.q.li h.y.l.u M.J.liu y.l.u h.W.pan y.l.q.u M.sugizaki h.sun W.X.Wang y.l.Wang q.y.Wu X.p.Xu y.F.Xu h.N.yang X.yang B.zhang M.zhang W.D.zhang z.zhang D.h.zhao X.q.Cong B.W.Jiang l.h.li X.B.q.u J.N.sun D.T.su J.Wang C.Wu z.Xu X.M.yang s.K.zhang z.zhang N.zhang y.F.zhu h.y.Ban X.z.Bi z.M.Cai W.Chen X.Chen y.h.Chen y.Cui X.l.Duan z.G Feng y.Gao J.W.he T.he J.J.huang F.li J.s.li T.J.li T.T.li h.q.liu l.liu R.liu s.liu N.Meng q.shi A.T.sun y.M.Wang y.B.Wang h.C.Wu D.X Xu y.q.yang y.yang X.s.yu K.X.zhang y.l.zhang y.h.zhang y.T.zhang h.zhou X.C.zhu J.s.Cheng l.q.n l.Wang q.l.Wang M.Bai R.l.Gao z.Ji y.R.liu F.l.Ma y.J.shi J.su y.y.Tan J.z.Tong h.T.Xu C.B.xue G.F.xue W.yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Astronomy and space science University of Chinese Academy of SciencesBeijing 100049China shanghai Institute of Technical physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology Co. LTDNanjing 211106China Institute of high Energy physics Chinese Academy of SciencesBeijing 100049China science and Technology on low-light-level Night Vision laboratory Xi'an 710065China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National space science Center Chinese Academy of ScienceBeijing 100190China

The lobster Eye Imager for Astronomy.l.IA),a pathfinder of the Wide-field X-ray Telescope of the Einstein probe mission,was successfully.l.unched onboard the sATech-01 satellite of the Chinese Academy of sciences on2022 July *** this paper,we introduce the design and on-ground test results of the lEIA *** stateof-the-art Micro-pore Optics(MpO),a wide field of view of 346 sq.are degrees(18.6°×18.6°)of the X-ray imager is *** optical assembly composed of 36 MpO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(CMOs)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of FWhM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of lEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOs sensors for X-ray observation,and by optimizing the working setups of the instrumental *** addition,lEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

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.h. 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.h.ang 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.l.i E.levichev C.h.li C.li D.y.l. 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.l. 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.l. y.y.l. z.J.li h.liang J.h.liang y.T.liang G.R.liao l.z.liao y.l.ao 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.l.u K.liu l.liu q.liu s.B.liu T.liu X.liu y.W.liu y.l.u y.l.liu z.q.liu z.y.l.u z.W.liu I.logashenko y.l.ng C.G.lu J.X.lu N.lu q.F.lü y.l. y.l. 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.q. y.q.q. W.B.q.an y.q.an C.F.q.ao J.J.q.n J.J.q.n l.q.q.n X.s.q.n T.l.q.u 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.l.boratory 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 polytechniq.e 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 uniq.e 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

Geometrical reconstruction of fluorescence events observed by the lhAAsO experiment

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Chinese physics C 2021年第4期45卷 416-425页

作者： F.Aharonian q.An Axikegu l.X.Bai y.X.Bai y.W.Bao D.Bastieri X.J.Bi y.J.Bi h.Cai J.T.Cai z.Cao z.Cao J.Chang J.F.Chang X.C.Chang B.M.Chen J.Chen l.Chen l.Chen l.Chen M.J.Chen M.l.Chen q.h.Chen s.h.Chen s.z.Chen T.l.Chen X.l.Chen y.Chen N.Cheng y.D.Cheng s.W.Cui X.h.Cui y.D.Cui B.z.Dai h.l.Dai z.G.Dai Danzengluobu D.della Volpe B.DEtorre piazzoli X.J.Dong J.h.Fan y.z.Fan z.X.Fan J.Fang J.Fang C.F.Feng l.Feng s.h.Feng y.l.Feng B.Gao C.D.Gao q.Gao W.Gao M.M.Ge l.s.Geng G.h.Gong q.B.Gou M.h.Gu J.G.Guo X.l.Guo y.q.Guo y.y.Guo y.A.han h.h.he h.N.he J.C.he s.l.he X.B.he y.h. M.heller y.K.hor C.hou X.hou h.B.hu s.hu s.C.hu X.J.hu D.h.huang q.l.huang W.h.huang X.T.huang z.C.huang F.Ji X.l.Ji h.y.Jia K.Jiang z.J.Jiang C.Jin D.Kuleshov K.levochkin B.B.li C.li C.li F.li h.B.li h.C.li h.y.l. J.li K.li W.l.li X.li X.li X.R.li y.l. y.z.li z.li z.li E.W.liang y.F.liang s.J.lin B.liu C.liu D.liu h.liu h.D.liu J.liu J.l.liu J.l.liu J.s.liu J.y.l.u M.y.l.u R.y.l.u s.M.liu W.liu y.N.liu z.X.liu W.J.long R.lu h.K.lv B.q.Ma l.l.Ma X.h.Ma J.R.Mao A.Masood W.Mitthumsiri T.Montaruli y.C.Nan B.y..pang p.pattarakijwanich z.y.pei M.y.q. D.Ruffolo V.Rulev A.saiz l.shao O.shchegolev X.D.sheng J.R.shi h.C.song yu.V.stenkin V.stepanov q.N.sun X.N.sun z.B.sun p.h.T.Tam z.B.Tang W.W.Tian B.D.Wang C.Wang h.Wang h.G.Wang J.C.Wang J.s.Wang l.p.Wang l.y.Wang R.N.Wang W.Wang W.Wang X.G.Wang X.J.Wang X.y.Wang y.D.Wang y.J.Wang y.p.Wang z.Wang z.Wang z.h.Wang z.X.Wang D.M.Wei J.J.Wei y.J.Wei T.Wen C.y.Wu h.R.Wu s.Wu W.X.Wu X.F.Wu s.q.Xi J.Xia J.J.Xia G.M.Xiang G.Xiao h.B.Xiao G.G.Xin y.l.Xin y.Xing D.l.Xu R.X.Xu l.xue D.h.yan C.W.yang F.F.yang J.y.yang l.l.yang M.J.yang R.z.yang s.B.yang y.h.yao z.G.yao y.M.ye l.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.D.zeng T.X.zeng W.zeng z.K.zeng M.zha X.X.zhai B.B.zhang h.M.zhang h.y.zhang J.l.zhang J.W.zhang l.zhang l.zhang l.X.zhang p.F.zhang p.F.zhang R.zhang s.R.zhang s.s.zhang X.zhang X.p.zhang y.zhang y.zhang y.F.zhang y.l.zhang B.zhao J.zhao l.zhao l.z.zhao s.p.zhao F.zheng y.zheng B.zhou h.zhou J.N.zhou p Key.l.boratory of particle Astrophyics&Experimental physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduSichuanChina state Key.l.boratory of paricle Detection and Electronics China University of science and Technology of China HefeiAnhui 230026China Department of Engineering physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space science Center Chinese Academy of SciencesBeijing 100190China school of physics Peking UniversityBeijing 100871China Center for Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China school of physics and Astronomy&school of physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China school of physical science and Technology Guangxi UniversityNanningGuangxi 530004China hebei Normal University ShijiazhuangHebei 050024China school of physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China school of Astronomy and space science Nanjing UniversityNanjingJiangsu 210023China Key.l.boratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of Frontier and Interdisciplinary science Shandong UniversityQingdaoShandong 266237China Key.l.boratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao lee Institute&school of physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of physical science and Technology Southwest Jiaotong UniversityChengduSichuan 610031China College of physics Sichuan UniversityChengduSichuan 610065China Key.l.boratory of Cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China school of physics and technology Wuhan UniversityWuhanHubei 430072Ch

The lhAAsO-WFCTA experiment,which aims to observe cosmic rays in the sub-EeV range using the fluorescence techniq.e,uses a new generation of high-performance *** ensure that the experiment has ex-cellent detection capability associated with the measurement of the energy spectrum,the primary composition of cosmic rays,and so on,an accurate geometrical reconstruction of air-shower events is *** paper de-scribes the development and testing of geometrical reconstruction for stereo viewed events using the WFCTA(Wide Field of view Cherenkov/Fluorescence Telescope Array)*** approaches,which take full advantage ofthe WFCTA *** *** is the stereo-angular method,which uses the pointing of triggered sipMs in the shower trajectory,and the other is the stereo-timing method,which uses the triggering time of the fired *** results show that both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly better than the stereo-angular method because the resolution of the latter is slightly.l.mited by the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

Observation of the Crab Nebula with lhAAsO-KM2A−a performance study

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Chinese physics C 2021年第2期45卷 518-530页

作者： F.Aharonian q.An Axikegu l.X.Bai y.X.Bai y.W.Bao D.Bastieri X.J.Bi y.J.Bi h.Cai J.T.Cai z.Cao J.Chang J.F.Chang X.C.Chang B.M.Chen J.Chen l.Chen M.J.Chen M.l.Chen q.h.Chen s.h.Chen s.z.Chen T.l.Chen X.l.Chen y.Chen N.Cheng y.D.Cheng s.W.Cui X.h.Cui y.D.Cui B.z.Dai h.l.Dai z.G.Dai D.della Volpe B.D'Ettorre piazzoli X.J.Dong J.h.Fan y.z.Fan z.X.Fan J.Fang K.Fang C.F.Feng l.Feng s.h.Feng y.l.Feng B.Gao C.D.Gao q.Gao W.Gao M.M.Ge l.s.Geng G.h.Gong q.B.Gou M.h.Gu J.G.Guo X.l.Guo y.q.Guo y.y.Guo y.A.han h.h.he h.N.he J.C.he s.l.he X.B.he y.h. M.heller y.K.hor C.hou X.hou h.B.hu s.hu s.C.hu X.J.hu D.h.huang q.l.huang W.h.huang X.T.huang z.C.huang F.Ji X.l.Ji h.y.Jia K.Jiang z.J.Jiang C.Jin D.Kuleshov K.levochkin B.B.li C.li F.li h.B.li h.C.li h.y.l. J.li K.li W.l.li X.li X.R.li y.l. y.z.li z.li E.W.liang y.F.liang s.J.lin B.liu C.liu D.liu h.liu h.D.liu J.liu J.l.liu J.s.liu J.y.l.u M.y.l.u R.y.l.u s.M.liu W.liu y.N.liu z.X.liu W.J.long R.lu h.K.lv B.q.Ma l.l.Ma X.h.Ma J.R.Mao A.Masood W.Mitthumsiri T.Montaruli y.C.Nan B.y.pang p.pattarakijwanich z.y.pei M.y.q. D.Ruffolo V.Rulev A.sáiz l.shao O.shchegolev X.D.sheng J.R.shi h.C.song yu.V.stenkin V.stepanov q.N.sun X.N.sun z.B.sun p.h.T.Tam z.B.Tang W.W.Tian B.D.Wang C.Wang h.Wang h.G.Wang J.C.Wang J.s.Wang l.p.Wang l.y.Wang R.N.Wang W.Wang X.G.Wang X.J.Wang X.y.Wang y.D.Wang y.J.Wang y.p.Wang z.Wang z.h.Wang z.X.Wang D.M.Wei J.J.Wei y.J.Wei T.Wen C.y.Wu h.R.Wu s.Wu W.X.Wu X.F.Wu s.q.Xi J.Xia J.J.Xia G.M.Xiang G.Xiao h.B.Xiao G.G.Xin y.l.Xin y.Xing D.l.Xu R.X.Xu l.xue D.h.yan C.W.yang F.F.yang J.y.yang l.l.yang M.J.yang R.z.yang s.B.yang y.h.yao z.G.yao y.M.ye l.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.D.zeng T.X.zeng W.zeng z.K.zeng M.zha X.X.zhai B.B.zhang h.M.zhang h.y.zhang J.l.zhang J.W.zhang l.zhang l.X.zhang p.F.zhang p.p.zhang R.zhang s.R.zhang s.s.zhang X.zhang X.p.zhang y.zhang y.F.zhang y.l.zhang B.zhao J.zhao l.zhao l.z.zhao s.p.zhao F.zheng y.zheng B.zhou h.zhou J.N.zhou p.zhou R.zhou X.X.zhou C.G.zhu F.R.zhu h.zhu K.J.zhu X.zuo Key.l.boratory of particle Astrophyics&Experimental physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of Chinese Academy of sciences 100049 BeijingChina TIANFU Cosmic Ray Research Center ChengduSichuanChina state Key.l.boratory of particle Detection and Electronics China University of science and Technology of China 230026 HefeiAnhuiChina Department of Engineering physics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National space science Center Chinese Academy of Sciences100190 BeijingChina school of physics Peking University100871 BeijingChina Center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina school of physics and Astronomy&school of physics(Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina school of physical science and Technology Guangxi University530004 NanningGuangxiChina hebei Normal University 050024 ShijiazhuangHebeiChina school of physics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina school of Astronomy and space science Nanjing University210023 NanjingJiangsuChina Key.l.boratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of Frontier and Interdisciplinary science Shandong University266237 QingdaoShandongChina Key.l.boratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao lee Institute&school of physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina school of physical science and Technology&school of Information science and Technology Southwest Jiaotong University610031 ChengduSichuanChina College of physics Sichuan University610065 ChengduSichuanChina Key.l.boratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina school of physics and Tec

A sub-array of the large high Altitude Air shower Observatory.l.AAsO),KM2A is mainly designed to observe a large fraction of the northern sky to hunt for γ-ray sources at energies above 10 *** though the detector construction is still underway.h.lf of the KM2A array.h.s been operating stably since the end of *** this paper,we present the KM2A data analysis pipeline and the first observation of the Crab Nebula,a standard candle in very.h.gh energy γ-ray *** detect γ-ray signals from the Crab Nebula in both energy ranges of 10-100 TeV and>100 TeV with high significance,by analyzing the KM2A data of 136 live days between December 2019 and May *** the observations,we test the detector performance,including angular resolution,pointing accuracy and cosmic-ray background rejection *** energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm^(-2) s^(-1) TeV^(-1).It is consistent with previous measurements by other *** opens a new window of γ-ray astronomy above 0.1 peV through which new ultrahigh-energy γ-ray phenomena,such as cosmic peVatrons,might be discovered.

关键词： γ-ray Crab Nebula extensive air showers cosmic rays

study of BEsIII trigger efficiencies with the 2018 J/ψ data

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Chinese physics C 2021年第2期45卷 48-55页

作者： M.Ablikim M.N.Achasov p.Adlarson s.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An q.An X.h.Bai y.Bai O.Bakina R.Baldini Ferroli I.Balossino y.Ban K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms A.Bortone I.Boyko R.A.Briere h.Cai X.Cai A.Calcaterra G.F.Cao N.Cao s.A.Cetin J.F.Chang W.l.Chang G.Chelkov D.y.Chen G.Chen h.s.Chen M.l.Chen s.J.Chen X.R.Chen y.B.Chen z.J Chen W.s.Cheng G.Cibinetto F.Cossio X.F.Cui h.l.Dai X.C.Dai A.Dbeyssi R.E.de Boer D.Dedovich z.y.deng A.Denig I.Denysenko M.Destefanis F.De Mori y.Ding C.Dong J.Dong l.y.Dong M.y.Dong X.Dong s.X.Du y.l.Fan J.Fang s.s.Fang y.Fang R.Farinelli l.Fava F.Feldbauer G.Felici C.q.Feng J.h.Feng M.Fritsch C.D.Fu y.Gao y.Gao y.Gao y.G.Gao I.Garzia p.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen l.Gong W.X.Gong W.Gradl M.Greco l.M.Gu M.h.Gu s.Gu y.T.Gu C.y Guan A.q.Guo l.B.Guo R.p.Guo y.p.Guo A.Guskov T.T.han W.y.h.n X.q.hao F.A.harris h hüsken K.l.he F.h.heinsius C.h.heinz T.held y.K.heng C.herold M.himmelreich T.holtmann y.R.hou z.l.hou h.M.hu J.F.hu T.hu y.h. G.s.huang l.q.huang X.T.huang y.p.huang z.huang T.hussain W.Ikegami Andersson W.Imoehl M.Irshad s.Jaeger s.Janchiv q.Ji q.p.Ji X.B.Ji X.l.Ji h.B.Jiang X.s.Jiang J.B.Jiao z.Jiao s.Jin y.Jin T.Johansson N.Kalantar-Nayestanaki X.s.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz.p.Kiese R.Kiuchi R.Kliemt l.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kühn J.J.lane J.s.lange p.larin A.lavania l.lavezzi z.h.lei h.leithoff M.lellmann T.lenz C.li C.h.li Cheng li D.M.li F.li G.li h.li h.li h.B.li h.J.li J.l.li J.q.li J.s.li Ke li l.K.li lei li p.R.li s.y.l. W.D.li W.G.li X.h.li X.l.li z.y.l. h.liang h.liang h.liang y.F.liang y.T.liang l.z.liao J.libby C.X.lin B.J.liu C.X.liu D.liu F.h.liu Fang liu Feng liu h.B.liu h.M.liu huanhuan liu huihui liu J.B.liu J.l.liu J.y.l.u K.liu K.y.l.u Ke liu l.liu M.h.liu p.l.liu q.liu q.liu s.B.liu shuai liu T.liu W.M.liu X.liu y.l.u y.B.liu z.A.liu z.q.liu X.C.lou F.X.lu h.J.lu J.D.lu J.G.lu X.l.lu y.l. y.p.lu C.l.luo M.X.luo b p.W.luo T.luo X.l.luo s Institute of high Energy physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China GIBudker Institute of Nuclear physics sB RAs(BINp) Novosibirsk 630090Russia GsI helmholtzcentre for heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA (A)INFN laboratori Nazionali di Frascati I-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly (A)INFN sezione di Ferrara I-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Institute of Modern physics Lanzhou 730000China Institute of physics and Technology Peace Ave54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-liebig-Universitaet Giessen IIPhysikalisches InstitutHeinrich-Buff-Ring 16D-35392GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands lanzhou University Lanzhou 730000China liaoning Normal Unive

Using a dedicated data sample taken in 2018 on the J/ψpeak,we perform a detailed study of the trigger efficiencies of the BEsIII *** efficiencies are determined from three representative physics processes,namely Bhabha scattering,dimuon production and generic hadronic events with charged *** combined efficiency of all active triggers approaches 100%in most cases,with uncertainties small enough not to affect most physics analyses.

关键词： BEsIII trigger efficiency Bhabha dimuon hadronic events

Measurements of the center-of-mass energies of e^(+)e^(-)collisions at BEsIII

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Chinese physics C 2021年第10期45卷 7-15页

作者： M.Ablikim M.N.Achasov p.Adlarson s.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An q.An X.h.Bai y.Bai O.Bakina R.Baldini Ferroli I.Balossino y.Ban K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms A.Bortone I.Boyko R.A.Briere h.Cai X.Cai A.Calcaterra G.F.Cao N.Cao s.A.Cetin J.F.Chang W.l.Chang G.Chelkov D.y.Chen G.Chen h.s.Chen M.l.Chen s.J.Chen X.R.Chen y.B.Chen z.J.Chen W.s.Cheng G.Cibinetto F.Cossio X.F.Cui h.l.Dai X.C.Dai A.Dbeyssi R.E.de Boer D.Dedovich z.y.deng A.Denig I.Denysenko M.Destefanis F.De Mori y.Ding C.Dong J.Dong l.y.Dong M.y.Dong X.Dong s.X.Du y.l.Fan J.Fang s.s.Fang y.Fang R.Farinelli l.Fava F.Feldbauer G.Felici C.q.Feng J.h.Feng M.Fritsch C.D.Fu y.Gao y.Gao y.Gao y.G.Gao I.Garzia p.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen l.Gong W.X.Gong W.Gradl M.Greco l.M.Gu M.h.Gu y.T.Gu C.y Guan A.q.Guo l.B.Guo R.p.Guo y.p.Guo A.Guskov T.T.han W.y.h.n X.q.hao F.A.harris K.l.he F.h.heinsius C.h.heinz T.held y.K.heng C.herold M.himmelreich T.holtmann G.y.h.u y.R.hou z.l.hou h.M.hu J.F.hu T.hu y.h. G.s.huang l.q.huang X.T.huang y.p.huang z.huang T.hussain N husken W.Ikegami Andersson W.Imoehl M.Irshad s.Jaeger s.Janchiv q.Ji q.p.Ji X.B.Ji X.l.Ji y.y.Ji h.B.Jiang X.s.Jiang J.B.Jiao z.Jiao s.Jin y.Jin M.q.Jing T.Johansson N.Kalantar-Nayestanaki X.s.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz.p.Kiese R.Kiuchi R.Kliemt l.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kuhn J.J.lane J.s.lange p.larin A.lavania l.lavezzi z.h.lei h.leithoff M.lellmann T.lenz C.li C.h.li Cheng li D.M.li F.li G.li h.li h.li h.B.li h.J.li J.l.li J.q.li J.s.li Ke li l.K.li lei li p.R.li s.y.l. W.D.li W.G.li X.h.li X.l.li Xiaoyu li z.y.l. h.liang h.liang h.liang y.F.liang y.T.liang G.R.liao l. z. liao J.libby C.X.lin B.J.liu C.X.liu D.liu F.h.liu Fang liu Feng liu h.B.liu h.M.liu huanhuan liu huihui liu J.B.liu J.l.liu J.y.l.u K.liu K.y.l.u l.liu M.h.liu p.l.liu q.liu q.liu s.B.liu shuai liu T.liu W.M.liu X.liu y.l.u y.B.liu z.A.liu z.q.liu X.C.lou F.X.lu h.J.lu J.D.lu J.G.lu X.l.lu y.l. y.p.lu C.l.luo Institute of high Energy physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear physics sB RAs(BINp) Novosibirsk 630090Russia GsI helmholtzcentre for heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN sezione di Ferrara University of FerraraI-44122FerraraItaly 25Institute of Modern PhysicsLanzhou 730000China Institute of Modern physics Lanzhou 730000China Institute of physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-liebig-Universitaet Giessen II.Physikali

During the 2016-17 and 2018-19 running periods,the BEsIII experiment collected 7.5 fb of e^(+)e^(-)collision data at center-of-mass energies ranging from 4.13 to 4.44 *** data samples are primarily used for the study of excited charmonium and charmoniumlike *** analyzing the di-muon process e^(+)e^(-)→(γIsR=FsR)μ^(+)μ^(-),we measure the center-of-mass energies of the data samples with a precision of 0.6 *** a run-by-run study,we find that the center-of-mass energies were stable throughout most of the data-collection period.

关键词： center-of-mass energy e^(+)e^(-) annihilation BEsIII

Future physics programme of BEsⅢ

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Chinese physics C 2020年第4期44卷 I0001-I0004,1-102页

作者： M.Ablikim M.N.Achasov p.Adlarson s.Ahmed M.Albrecht M.Alekseev A.Amoroso F.F.An q.An y.Bai O.Bakina R.Baldini Ferroli y.Ban K.Begzsuren J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi J Biernat J.Bloms I.Boyko R.A.Briere l.Calibbi h.Cai X.Cai A.Calcaterra G.F.Cao N.Cao s.A.Cetin J.Chai J.F.Chang W.l.Chang J.Charles G.Chelkov Chen G.Chen h.s.Chen J.C.Chen M.l.Chen s.J.Chen y.B.Chen h.y.Cheng W.Cheng G.Cibinetto F.Cossio X.F.Cui h.l.Dai J.p.Dai X.C.Dai A.Dbeyssi D.Dedovich z.y.deng A.Denig Denysenko M.Destefanis s.Descotes-Genon F.De Mori y.Ding C.Dong J.Dong l.y.Dong M.y.Dong z.l.Dou s.X.Du s.I.Eidelman J.z.Fan J.Fang s.s.Fang y.Fang R.Farinelli l.Fava F.Feldbauer G.Felici C.q.Feng M.Fritsch C.D.Fu y.Fu q.Gao X.l.Gao y.Gao y.Gao y.G.Gao z.Gao B.Garillon I.Garzia E.M.Gersabeck A.Gilman K.Goetzen l.Gong W.X.Gong W.Gradl M.Greco l.M.Gu M.h.Gu y.T.Gu A.q.Guo F.K.Guo l.B.Guo R.p.Guo y.p.Guo A.Guskov s.han X.q.hao F.A.harris K.l.he F.h.heinsius T.held y.K.heng y.R.hou z.l.hou h.M.hu J.F.hu T.hu y.h. G.s.huang J.s.huang X.T.huang X.z.huang z.l.huang N.huesken T.hussain W.Ikegami Andersson W.Imoehl M.Irshad q.Ji q.p.Ji X.B.Ji X.l.Ji h.l.Jiang X.s.Jiang X.y.Jiang J.B.Jiao z.Jiao D.p.Jin s.Jin y.Jin T.Johansson N.Kalantar-Nayestanaki X.s.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk T.Khan A.Khoukaz.p.Kiese R.Kiuchi R.Kliemt l.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.Kurth M.G.Kurth W.Kuhn J.s.lange p.larin l.lavezzi h.leithoff T.lenz C.li Cheng li D.M.li F.li F.y.l. G.li h.B.li h.J.li J.C.li J.W.li Ke li l.K.li lei li p.l.li p.R.li q.y.l. W.D.li W.G.li X.h.li X.l.li X.N.li X.q.li z.B.li h.liang h.liang y.F.liang y.T.liang G.R.liao l.z.liao J.libby C.X.lin D.X.lin y.J.lin B.liu B.J.liu C.X.liu D.liu D.y.l.u F.h.liu Fang liu Feng liu h.B.liu h.M.liu huanhuan liu huihui liu J.B.liu J.y.l.u K.y.l.u Ke liu q.liu s.B.liu T.liu X.liu X.y.l.u y.B.liu z.A.liu zhiq.ng liu y.F.long X.C.lou h.J.lu J.D.lu J.G.lu y.l. y.p.lu C.l.luo M.X.luo p.W.luo T.luo X.l.luo s.lusso X.R.lyu F.C.Ma h.l.Ma l.l.Ma M.M.Ma q.M.Ma X.N.Ma X.X. Institute of high Energy physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear physics sB RAs(BINp) Novosibirsk 630090Russia GsI helmholtzcentre for heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN laboratori Nazionali di Frascati I-00044FrascatiItaly INFN sezione di Ferrara I-44122FerraraItaly Institute of physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands lanzhou University Lanzhou 730000China liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China peking University Beijing 100871China shandong University Jinan 250100China shanghai

There has recently been a dramatic renewal of interest in hadron spectroscopy and charm physics. This renaissance has been driven in part by the discovery of a plethora of charmonium-like Xyz states at BEsⅢ and B factories, and the observation of an intriguing proton-antiproton threshold enhancement and the possibly related X(1835) meson state at BEsⅢ, as well as the threshold measurements of charm mesons and charm baryons. We present a detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BEsⅢ during the remaining operation period of BEpCⅡ. This survey will help in the optimization of the data-taking plan over the coming years, and provides physics motivation for the possible upgrade of BEpCⅡ to higher luminosity.

关键词： meson hadron optimization