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SlBEL1. regulates flavonoid biosynthesis,thus fine-tuning auxin efflux to prevent premature fruit drop in tomato

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Journal of Integrative Plant Biology 2024年第4期66卷 749-770页

作者： Xiufen Dong Xianfeng Liu lina Cheng Ruizhen Li Si{1. Ge Sai {2. yue Cai Yang Liu Sida Meng Cai-Zhong Jiang Chun-lin Shi Tianlai Li Da{1. Fu Mingfang {1. tao Xu College of Horticulture Shenyang Agricultural UniversityShenyang 110866China Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province College of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory for Quality and Safety Control of Subtropical Fruits and Vegetables Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang ProvinceMinistry of Agriculture and Rural AffairsCollege of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory of Protected Horticulture of Ministry of Education Shenyang 110866China Crops Pathology and Genetic Research Unit United States Department of Agriculture Agricultural Research ServiceWashingtonDC 20250USA department of Plant Sciences University of CaliforniaDavisCA 95616USA ANGENOVO Oslo 0753Norway Laboratory of Fruit Biology College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Auxin regulates flower and fruit abscission,but how developmental signals mediate auxin transport in abscission remains ***,we reveal the role of the transcription factor BEL1.LIKE HOMEODOMAIN1.(SlBEL1.)in regulating auxin transport during abscission in tomato(Solanum lycopersicum).SlBEL1. is highly expressed in the fruit abscission zone,and its expression increases during fruit *** of SlBEL1. expression by RNA interference(RNAi)caused premature fruit drop at the breaker(Br)and 3d post-breaker(Br+3)stages of fruit *** and metabolome analysis of SlBEL1.-RNAi lines revealed impaired flavonoid biosynthesis and decreased levels of most flavonoids,especially quercetin,which functions as an auxin transport *** suggested that SlBEL1. prevents premature fruit abscission by modulating auxin efflux from fruits,which is crucial for the formation of an auxin response ***,quercetin treatment suppressed premature fruit drop in SlBEL1.-RNAi *** affinity purification sequencing(DAP-seq)analysis indicated that SlBEL1. induced expression of the transcription factor gene SlMYB1.1.by directly binding to its *** immunoprecipitation-quantitative polymerase chain reaction and electrophoretic mobility shift assay showed that *** MYELOBLASTOSIS VIRAL ONCOGENE HOMOLOG1.1.SlMYB1.1.induces the expression of the core flavonoid biosynthesis genes SlCHS1.SlCHI,SlF3H,and SlFLS by directly binding to their *** findings suggest that the SlBEL1.-SlMYB1.1.module modulates flavonoid biosynthesis to fine-tune auxin efflux from fruits and thus maintain an auxin response gradient in the pedicel,thereby preventing premature fruit drop.

关键词： abscission auxin flavonoid SlBEL1. tomato

Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-1. experiment

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Science china(Physics,Mechanics & Astronomy) 2024年第10期67卷 83-91页

作者： Zhenhua Zhang Litao Yang qian yue Kejun Kang Yuanjing Li Haipeng An Greeshma C. Jianping Chang Yunhua Chen Jianping Cheng Wenhan Dai Zhi Deng Changhao Fang Xinping Geng Hui Gong qiuju Guo tao Guo Xuyuan Guo Li He Shengming He Jinwei Hu Hanxiong Huang Tuchen Huang lin Jiang S.Karmakar Haubin Li Hanyu Li Jianmin Li Jin Li qianyun Li Renmingjie Li Xueqian Li Yulan Li Yifan Liang Bin Liao FongKay lin ShinTed lin Jiaxuan Liu Shukui Liu Yandong Liu Yu Liu Yuanyuan Liu Hao Ma Yucai Mao qiyuan Nie Jinhua Ning Hui Pan Ningchun qi Jie Ren Xichao Ruan Monoj Kumar Singh Tianxi Sun Changjian Tang Yang Tian Guangfu wang Junzheng wang Li wang qing wang Yufeng wang Yunxiang wang Henry Tsz-King Wong Shiyong Wu Yucheng Wu Haoyang Xing Rui Xu Yin Xu tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng yue Ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong Zhao Kangkang Zhao Minggang Zhao Jifang zhou Zuying zhou Jingjun Zhu CDEX Collaboration Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and department of {1. Physics Tsinghua UniversityBeijing 100084China department of Physics Tsinghua UniversityBeijing 100084China Institute of Physics Academia SinicaTaipei 11529China NUCTECH Company Beijing 100084China YaLong River Hydropower Development Company Chengdu 610051China College of Nuclear Science and technology Beijing Normal UniversityBeijing 100875China College of Physics Sichuan UniversityChengdu 610065China School of Physics Peking UniversityBeijing 100871China department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China Sino-French Institute of Nuclear and technology Sun Yet-sen UniversityZhuhai 519082China School of Physics Nankai UniversityTianjin 300071China department of Physics Banaras Hindu UniversityVaranasi 221005India department of Physics Beijing Normal UniversityBeijing 100875China 不详

Dark matter(DM)is a major constituent of the ***,no definite evidence of DM particles(denoted as“χ”)has been found in DM direct detection(DD)experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes(PBHs).We search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1.1.^(1.)to 7×1.^(1.)g under the current limits of PBH abundance *** {1.5.4 kg·day data obtained from the CDEX-1. experiment conducted in the china Jinping Underground Laboratory,we exclude theχ-electron(χ-e)elastic-scattering cross sectionσ_(χe)~5×1.^(-{1.)cm^({1.forχwith a mass■keV from our *** the higher radiation background but lower energy threshold(1.0 eV),CDEX-1. fills a part of the gap in the previous ***(m_(χ),σ_(χe))can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

关键词： CDEX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

GdFeCo/DyFeCo交换耦合两层薄膜磁化方向转变的研究

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物理学报 2004年第2期53卷 614-619页

作者：张约品王现英林更琪李震李佐宜沈德芳干福熹中国科学院上海光学精密机械研究所华中科技大学电子科学与技术系武汉430074

用磁控溅射法制备了GdFeCo DyFeCo交换耦合两层薄膜 ,对交换耦合两层薄膜变温磁化方向进行了研究 .结果表明读出层GdFeCo随温度上升从平面磁化转变成垂直磁化 ,转变过程中主要受饱和磁矩 (Ms)的影响 .在GdFeCo的补偿温度附近 ,读出层的... 详细信息

用磁控溅射法制备了GdFeCo DyFeCo交换耦合两层薄膜 ,对交换耦合两层薄膜变温磁化方向进行了研究 .结果表明读出层GdFeCo随温度上升从平面磁化转变成垂直磁化 ,转变过程中主要受饱和磁矩 (Ms)的影响 .在GdFeCo的补偿温度附近 ,读出层的磁化强度近于零 ,退磁场能减小 ,并在交换耦合的作用下 ,使读出层的磁化方向发生转变。

关键词：磁光记录交换耦合两层薄膜磁化方向转变磁控溅射法饱和磁矩补偿温度磁化强度中心孔磁超分辨效应

Study of the response of 1.B-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 Jing‑Wen Li Wei Xu tao Li Ze‑Bin lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑tao Jing 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 Liu Rong Liu Shu‑Bin Liu 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 Laboratory 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 {1. Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory 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 Laboratory 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.1.B-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 1. mol%1.B 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 1. 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 1.B-doped MCP Neutron response Wide-energy range neutrons

1.B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： qiang Li Li‑Jiao wang Jing‑Yu Tang Xiang‑Biao qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei Xu tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑qing Feng Rong Zhang Xiao‑Yang Sun qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao qi‑Ping Chen Yong‑Hao Chen Zeng‑qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin ling Kang Bo Li Gong Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng wang Peng‑Cheng wang Zhao‑Hui wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang lin‑Hao Zhang qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang yue Zhang Zhi‑Yong Zhang Zhi‑Hao zhou Ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China china Academy of {1. Physics Institute of Nuclear Physics and ChemistryMianyang 621900China 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 china Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional t{1.smission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI {2. has been sluggish since its inception in the 1.80s,particularly considering the limited studies analyzing the neutron energy {1.ge above *** white neutron source(Back-n)at the china Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy {1.ge from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 1.B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the t{1.smission images by their characteristic resonance peaks in the 1.1.0 eV energy {1.ge;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1.1.0 keV energy {1.ge can also be *** particular,results in the neutron energy {1.ge of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 1.B doped MCP detector White neutron source Sample nuclide identification

Measurement of solar pp neutrino flux using electron recoil data from PandaX-4T commissioning run

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Chinese Physics C 2024年第9期48卷 1-7,300页

作者： Xiaoying Lu Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Zhaokan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Lisheng Geng Karl Giboni Xuyuan Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Junting Huang zhou Huang Ruquan Hou Yu Hou Xiangdong Ji Yong{2. Ju Chenxiang Li Jiafu Li Mingchuan Li Shuaijie Li tao Li qing {2. Jianglai Liu Congcong Lu {2.gyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yajun Mao yue Meng Xuyang Ning Binyu Pang Ningchun qi Zhicheng qian Xiangxiang Ren Nasir Shaheed Xiaofeng Shang Xiyuan Shao Guofang Shen Manbin Shen {2. Si Wenliang Sun Yi tao Anqing wang Meng wang qiuhong wang Shaobo wang Siguang wang Wei wang Xiuli wang Xu wang zhou wang yuehuan Wei Mengmeng Wu Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Kaizhi Xiong Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Ying Yuan Zhe Yuan Youhui Yun Xinning Zeng Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang tao Zhang Wei Zhang Yang Zhang Yingxin Zhang Yuanyuan Zhang Li Zhao Jifang zhou Ning zhou Xiaopeng zhou Yubo zhou Zhizhen zhou Research Center for Particle Science and technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province Liangshan 615000China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear engineering and {1. Sun Yat-Sen UniversityZhuhai 519082China department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Beihang UniversityBeijing 102206China beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China department of Physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory 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 School of Physics Peking UniversityBeijing 100871Ch

The proton-proton(pp)fusion chain dominates the neutrino production in the *** uncertainty of the predicted pp neutrino flux is at the sub-percent level,whereas that of the best measurement is O(1.%).In this study,for the first time,we measure solar pp neutrinos in the electron recoil energy range from {1. to 1.4 keV using the PandaX-4T commissioning data with 0.63 tonne×year *** pp neutrino flux is determined as(8.0±3.9(stat)±1..0(syst))×1.1. s^(-1.cm^(-{1.,which is consistent with the Standard Solar Model and existing measurements,corresponding to an upper flux limit of {1..3×1.^(1.)s^(-1.cm^(-{1.at 90%C.L..

关键词： solar pp neutrino flux PandaX-4T electron recoil spectrum

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

Searching for^(76)Ge neutrinoless double beta decay with the CDEX-1. 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 {1. 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 {1. Li {1. qing {1. Yu-Feng {1. Yun-Xiang {1. 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 {21. Zu-Ying {21. Jing-Jun {21. Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and department of {1. 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-1.,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,1.89–{1.89 keV for this work)with a factor of {1..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.{1.^(0ν)>1.0×1.^({1.)yr(90%C.L.),corresponding to the upper limits on the effective Majorana neutrino mass:1.7.5 eV.

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

An in-plane low-noise accelerometer fabricated with an improved process flow

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2009年第10期10卷 1413-1420页

作者： Xu-dong ZHENG Zhong-he JIN yue-{1. {2. Wei-jun {1. Xiao-qi zhou department of Information Science and {1. {2. Zhejiang University Hangzhou 310027 China

We present a bulk micromachined in-plane capacitive accelerometer fabricated with an improved process flow,by etching only one-fifth of the wafer thickness at the back of the silicon while forming the bar-structure electrode for the sensing *** improved flow greatly lowers the footing effect during deep reactive ion etching(DRIE),and increases the proof mass by 54% compared to the traditional way,resulting in both improved device quality and a higher yield *** in the X direction is sensed capacitively by varying the overlapped area of a differential capacitor pair,which eliminates the nonlinear behavior by fixing the parallel-plate *** damping coefficient of the sensing motion is low due to the slide-film damping.A large proof mass is made using DRIE,which also ensures that dimensions of the spring beams in the Y and Z directions can be made large to lower cross axis coupling and increase the pull-in *** theoretical Brownian noise floor is 0.47 μg/Hz1.2.at room temperature and atmospheric *** tested frequency response of a prototype complies with the low damping design *** data for input acceleration from ?1.g to 1.g are recorded by a digital multimeter and show very good *** tested {2.dom bias of the prototype is 1.0 μg at an averaging time of around 6 s.

关键词： MEMS accelerometer, Deeo reactive ion etchin (DRIE), Footin effect, Canacitive sensing