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JLab库仑求和规则测试实验量能器性能分析

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中国科学技术大学学报 2010年第3期40卷 226-230页

作者：阎新虎叶云秀吕海江蒋一沈激陈子瑜中国科学技术大学近代物理系安徽合肥230026

对6块CsI和NaI晶体组成的量能器(CSR晶体)在美国JLab Hall A实验装置上进行性能测试.0.4～3.6 GeV能量的电子束入射到不同靶(4He,12C,56Fe和208Pb)上,在散射角90°和120°上测量散射电子的能量.进而对CSR晶体以及Hall A原有的铅玻璃量... 详细信息

对6块CsI和NaI晶体组成的量能器(CSR晶体)在美国JLab Hall A实验装置上进行性能测试.0.4～3.6 GeV能量的电子束入射到不同靶(4He,12C,56Fe和208Pb)上,在散射角90°和120°上测量散射电子的能量.进而对CSR晶体以及Hall A原有的铅玻璃量能器进行能量刻度并求得它们的能量分辨率,得出CSR晶体的能量分辨率比铅玻璃的分辨率平均好4倍多,能更好地区分所要的散射电子和要去除的背景电子.由此JLab Hall A的库仑求和规则实验将选用CsI或NaI晶体替代原有的铅玻璃量能器.

关键词： CSR 刻度能量分辨率

JLab Hall-A库仑求和规则实验中气体契仑柯夫探测器刻度和截断效率研究(英文)

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中国科学技术大学学报 2013年第6期43卷 480-485页

作者：闫新虎叶云秀吕海江蒋峰建朱鹏佳石瑛黄山学院物理系安徽黄山245041 中国科学技术大学近代物理系安徽合肥230026

在库仑求和实验中,主要用JLab Hall-A里左臂和右臂上的气体契仑柯夫探测器区分背景粒子,它可以有效地从好电子样本中分离出主要背景粒子π.气体契仑柯夫探测器已经被很好地刻度,其中的10个球面镜道都已被刻度到统一值200.通过对该探测... 详细信息

在库仑求和实验中,主要用JLab Hall-A里左臂和右臂上的气体契仑柯夫探测器区分背景粒子,它可以有效地从好电子样本中分离出主要背景粒子π.气体契仑柯夫探测器已经被很好地刻度,其中的10个球面镜道都已被刻度到统一值200.通过对该探测器信号的刻度修正,电子截断效率和π粒子拒绝效率的研究,即便在低动量区间,电子的截断效率和π的拒绝效率也分别好于99%和98.5%.经过刻度修正和效率分析后的气体契仑柯夫探测器可以为库仑求和实验的截面计算提供优秀的粒子鉴别效率.

关键词：库仑求和规则刻度截断效率 π拒绝

JLab Hall-A上CSR实验的铅玻璃量能器刻度与效率分析(英文)

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中国科学技术大学学报 2014年第3期44卷 217-220页

作者：闫新虎叶云秀吕海江蒋峰建朱鹏佳石瑛黄山学院物理系安徽黄山245021 中国科学技术大学近代物理系安徽合肥230026

JLab的A大厅里的高分辨谱仪安装了双层的铅玻璃量能器,用来做粒子鉴别分析.2008年初我们在美国的JLab获取了全部的CSR实验数据,这里采用了ROOT分析软件里的Fumili拟合方法和准弹性散射数据对位于高分辨谱仪上的量能器进行刻度.因为实验... 详细信息

JLab的A大厅里的高分辨谱仪安装了双层的铅玻璃量能器,用来做粒子鉴别分析.2008年初我们在美国的JLab获取了全部的CSR实验数据,这里采用了ROOT分析软件里的Fumili拟合方法和准弹性散射数据对位于高分辨谱仪上的量能器进行刻度.因为实验过程中硬件高压设置的变化,需要对CSR实验数据进行不同的对应的刻度.刻度结果表明此刻度修正是合适的.散射电子动量为1 GeV时,铅玻璃量能器对该能量粒子的最好分辨率为0.048 GeV.电子效率和pion介子拒绝度可以分别达到99.3%和99.8%.

关键词：铅玻璃量能器分辨率刻度截断效率

Electron-ion collider in China

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Frontiers of physics 2021年第6期16卷 1-78页

作者： Daniele PAnderle Valerio Bertone Xu Cao Lei Chang Ningbo Chang Gu Chen Xurong Chen Zhuojun Chen Zhufang Cui Lingyun Dai Weitian Deng Minghui Ding Xu Feng Chang Gong Longcheng Gui Feng-Kun Guo Chengdong Han Jun He Tie-Jiun Hou Hongxia Huang Yin Huang KrešImir KumeričKi LPKaptari Demin Li Hengne Li Minxiang Li Xueqian Li Yutie Liang Zuotang Liang Chen Liu Chuan Liu Guoming Liu Jie Liu Liuming Liu Xiang Liu Tianbo Liu Xiaofeng Luo Zhun Lyu Boqiang Ma Fu Ma Jianping Ma Yugang Ma Lijun Mao Cédric Mezrag HervéMoutarde Jialun Ping Sixue Qin Hang Ren Craig DRoberts Juan Rojo Guodong Shen Chao Shi Qintao Song Hao Sun PawełSznajder Enke Wang Fan Wang Qian Wang Rong Wang Ruiru Wang Taofeng Wang Wei Wang Xiaoyu Wang Xiaoyun Wang Jiajun Wu Xinggang Wu Lei Xia Bowen Xiao Guoqing Xiao Ju-Jun Xie Yaping Xie Hongxi Xing Hushan Xu Nu Xu Shusheng Xu Mengshi yan Wenbiao yan Wencheng yan xinhu yan Jiancheng yang Yi-Bo yang Zhi yang Deliang Yao Zhihong Ye Peilin Yin C-PYuan Wenlong Zhan Jianhui Zhang Jinlong Zhang Pengming Zhang Yifei Zhang Chao-Hsi Chang Zhenyu Zhang Hongwei Zhao Kuang-Ta Chao Qiang Zhao Yuxiang Zhao Zhengguo Zhao Liang Zheng Jian Zhou Xiang Zhou Xiaorong Zhou Bingsong Zou Liping Zou Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China IRFU CEAUniversitéParis-SaclayF-91191 Gif-sur-YvetteFrance Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Nankai University Tianjin 300071China Xinyang Normal University Xinyang 464000China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Hunan University Changsha 410082China Nanjing University Nanjing 210093China Huazhong University of Science and Technology Wuhan 430074China European Centre for Theoretical Studies in Nuclear Physics and Related Areas(ECT*)and Fondazione Bruno Kessler Villa TambosiStrada delle Tabarelle 286I-38123 Villazzano(TN)Italy School of Physics Peking UniversityBeijing 100871China Hunan Normal University Changsha 410081China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Nanjing Normal University Nanjing 210023China Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Southwest Jiaotong University Chengdu 610000China Department of Physics Faculty of ScienceUniversity of ZagrebBijenička c.3210000 ZagrebCroatia Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchDubna 141980Russia School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Lanzhou University Lanzhou 730000China Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China School of Physics Southeast UniversityNanjing 211189China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Depa

Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as *** a future high energy nuclear physics project,an Electron-ion collider in China(EicC)has been *** will be constructed based on an upgraded heavy-ion accelerator,High Intensity heavy-ion Accelerator Facility(HIAF)which is currently under construction,together with a new electron *** proposed collider will provide highly polarized electrons(with a po-larization of 80%)and protons(with a polarization of 70%)with variable center of mass energies from 15 to 20 GeV and the luminosity of(2–3)×1033 cm^(−2)·s^(−1).Polarized deuterons and Helium-3,as well as unpolarized ion beams from Carbon to Uranium,will be also available at the *** main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region,including 3D tomography of nucleon;the partonic structure of nuclei and the parton interaction with the nuclear environment;the exotic states,especially those with heavy flavor quark *** addition,issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the *** order to achieve the above-mentioned physics goals,a hermetical detector system will be constructed with cutting-edge *** document is the result of collective contributions and valuable inputs from experts across the *** EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United *** success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in China.

关键词： electron ion collider nucleon structure nucleon mass exotic hadronic states quantum chromodynamics 3D-tomography helicity transverse momentum dependent parton distribution generalized parton distribution energy recovery linac polarization spin rotator

Experimental Study on Gold Dissolution from Hosting Minerals of the Hadamengou Gold Deposit and the Implications

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Acta Geologica Sinica(English Edition) 2008年第4期82卷 762-768页

作者： LI Qiangzhi yan Fengzeng WANG xinhu Gold Headquarter of the Chinese Army Police Force Beijing 100102 China

The Hadamengou gold deposit is located in western part of the northern margin of the North China craton. It is a hydrothermal deposit related to alkaline magmatism. Dissolution of Au, Fe from pyrite and iron oxide （including magnetite and hematite） individual minerals in the three main types of ore shows： in iron oxides （magnetite and hematite）, Au and Fe were dissolved simultaneously and their solubilities are positively correlated, which means Au is mainly chemical-bonded （lattice gold） and/or colloidal-adsorbed in iron oxides; while in pyrite, on the contrary, Au dissolution obviously lags behind Fe and the solubility of Au shows negative relationship with that of Fe, which indicates Au is mainly hosted as grains of elemental gold （or native gold） within pyrite. Previous studies revealed that the Hadamengou gold deposit is characterized by intensive K-feldspathization and holds high content of iron oxides occasionally replaced by sulfides, which was caused by oxidizing K-enriched alkaline fluids under a stretching geodynamic setting. These geological features, together with the high Au-content in iron oxides, comparable with that of the Olympic Dam deposit in South Australia, suggest that this deposit is the first example of iron oxide-type gold deposits in China.

关键词： Hadamengou gold deposit gold-bearing iron oxides iron oxide-type gold deposit,dissolution experiment North China craton

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库仑求和实验关于核介质中核子性质的研究

黄山学院学报 2014年第3期16卷 10-12页

作者：闫新虎张燕飞蒋峰建叶剑锋黄山学院信息工程学院安徽黄山245041

电子-核子散射实验中,通过对散射截面的纵向和横向响应函数的提取,可以分离出短程效应,而这也需要通过消除pion介子交换的影响来起作用,pion介子交换的贡献不仅在长程相互作用中起主要作用,同样在短程相互作用中也起主要作用。库仑求和... 详细信息

电子-核子散射实验中,通过对散射截面的纵向和横向响应函数的提取,可以分离出短程效应,而这也需要通过消除pion介子交换的影响来起作用,pion介子交换的贡献不仅在长程相互作用中起主要作用,同样在短程相互作用中也起主要作用。库仑求和实验可以研究核介质中核子的性质,核内核子的动量分布和核子-核子相互作用,特别对核内短程核子-核子相互关联会有更深入的理解。

关键词：库仑求和核介质效应核子-核子短程关联

Comparison between two types of＂Scheuermann disease-like people＂： thoracolumbar disc herniation patients and healthy volunteers with radiological signs of Scheuermann＇s disease

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Chinese Medical Journal 2014年第22期127卷 3862-3866页

作者： Guo xinhu Chen Zhongqiang Liu Ning Guo Zhaoqing Qi Qiang Li Weishi Zeng yan Sun Chuiguo Department of Orthopaedics Peking University Third HospitalBeijing 100191 China Massachusetts General Hospital Department of Orthopaedic SurgerySpine Service Boston MA USA

Background Scheuermann＇s disease （SD） is a spinal disorder and includes both a classic form and an atypical ***,its existence among the general population as well as the disc disease patients is *** of our previous studies showed that about 18％ of the hospital staff members meet the SD *** the other hand,another study has demonstrated that 95.2％ of the symptomatic thoracolumbar disc herniation （STLDH） patients meet the SD criteria,which suggests that STLDH is very likely a special form of *** purpose of this study was to discriminate the factors contributing to the development of STLDH by comparing STLDH patients with the healthy SD-like hospital staff *** This is a retrospective study including 33 STLDH patients who met the SD criteria and 30 SD-like hospital staff *** STLDH group was chosen from a group of patients who underwent surgery after a diagnosis of STLDH （T10/11-L1/2） at our hospital between June 2007 and June ***-like hospital staff members were chosen from a database created in 2007,which contained a lumbar MR and low back pain （LBP） questionnaire of 188 hospital staff *** demographic and radiologic characteristics were compared between *** There was no statistical difference in sex,age,and height between the two *** STLDH patients had higher body weight,boby mass index,and thoracolumbar kyphotic angle than SD-like hospital staff *** addition,STLDH patients had more levels of Schmorl＇s nodes （3.5±1.7 vs.2.0±1.9,t=3.364,P=0.001） and irregular endplateson （4.0±1.9 vs.2.7±1.9,t=2.667,P=0.010） compared to the SD-like hospital staff *** Higher body weight,higher body mass index,larger thoracolumbar kyphosis,and more Schmorl＇s nodes and irregular endplates on MR may be associated with the development of STLDH in ＂SD-like people.＂

关键词： intervertebral disc herniation Scheuermann disease Schmorl's nodethoracic vertebrae

鄂尔多斯盆地中东部本溪组致密砂岩储层特征及有利层段优选

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西安科技大学学报 2023年第1期43卷 109-118页

作者：黄道军李新虎刘燕张辉中国石油长庆油田分公司勘探开发研究院陕西西安710018 西安科技大学地质与环境学院陕西西安710054

鄂尔多斯盆地中东部本溪组发育厚层含气的致密砂岩储层,开展其储层特征及有利层段研究,对于深化鄂尔多斯盆地中东部本溪组储层地质认识和有利勘探层段选择具有重要的理论和指导意义。基于岩石薄片、X射线衍射、扫描电镜等分析测试以及... 详细信息

鄂尔多斯盆地中东部本溪组发育厚层含气的致密砂岩储层,开展其储层特征及有利层段研究,对于深化鄂尔多斯盆地中东部本溪组储层地质认识和有利勘探层段选择具有重要的理论和指导意义。基于岩石薄片、X射线衍射、扫描电镜等分析测试以及常规压汞、常规物性、核磁共振等多种岩石物理分析,综合开展了储层岩石学、孔隙结构、物性、含气性特征研究;结合烃源岩品质以及储层可压性、气测曲线特征开展有利层段优选。结果表明:鄂尔多斯盆地中东部本溪组砂岩以石英砂岩和岩屑石英砂岩为主,储集空间以原生粒间孔和次生溶孔为主;砂岩具有低孔、低渗、颗粒偏细等特点,属高排驱压力-微喉道型和物性较差的致密砂岩储层。储层具有高杨氏模量、低泊松比、石英等脆性矿物含量较高的特点,使储层易压裂改造;下伏于8号煤层且发育良好的致密砂岩储层为本溪组重要的气层,邻近灰岩的上覆致密砂岩储层含水性增强。研究成果为鄂尔多斯盆地中东部本溪组致密砂岩气的规模勘探与效益开发提供地质依据。

关键词：致密砂岩储层特征有利层段本溪组鄂尔多斯盆地

后路腰椎椎体间融合术后cage移位的危险因素分析及处理策略

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中国脊柱脊髓杂志 2022年第1期32卷 42-49页

作者：郭新虎孟妍齐强李危石郭昭庆曾岩孙垂国陈仲强北京大学第三医院骨科北京市100191

目的:探讨开放后路腰椎椎体间融合术后cage移位的发生率、相关危险因素及其处理对策。方法:回顾性分析2016年1月~2017年12月在我院骨科腰椎专业组行开放后路腰椎椎体间融合手术的970例患者,男423例,女547例;年龄14~87岁(56.8±12.5岁)... 详细信息

目的:探讨开放后路腰椎椎体间融合术后cage移位的发生率、相关危险因素及其处理对策。方法:回顾性分析2016年1月~2017年12月在我院骨科腰椎专业组行开放后路腰椎椎体间融合手术的970例患者,男423例,女547例;年龄14~87岁(56.8±12.5岁)。随访时腰椎侧位X线片上cage后缘标记线位置较术后首次测量时移动大于3mm判定为cage移位,纳入cage移位组。在无cage移位的患者中随机抽取100例作为对照组。统计并比较两组患者的一般资料[年龄、性别、体重指数(body mass index,BMI)]、皮下腰椎指数(subcutaneous lumbar spine index,SLSI)、术中出血量、术前和术后腰椎前凸角(lumbar lordosis,LL)、术前和术后平均椎间高度(mean disc hight,MDH)、术前和术后椎间隙后缘高度(posterior disc height,PHD)、术前和术后椎间隙活动度(range of motion,ROM)、有无终板损伤、有无骨质疏松、螺钉置入深度、椎间隙形态、有无螺钉松动、cage置入深度等。对单因素分析有统计学意义的参数进行Logistic回归分析以寻找cage移位的独立危险因素。结果:随访6~66个月(43.4±18.2个月),共21例(2.16%)患者22枚cage术后出现移位。cage移位组的年龄、术前及术后MDH、术后ROM、男性患者比例、骨质疏松患者比例、合并螺钉松动比例、梨形椎间隙比例均大于对照组(P0.05)。Logistic回归分析显示螺钉松动(OR=5.020,95%CI 1.026~24.564,P=0.046)、骨质疏松(OR=8.116,95%CI 1.503~43.841,P=0.015)及梨形椎间隙(OR=28.031,95%CI 1.850~424.748,P=0.016)是cage移位的独立危险因素。cage移位患者中有12例(1.24%)cage后移进入椎管,其中8例无明显症状,行保守治疗,末次随访(平均52.4±7.6个月)时椎体间已融合,3例(0.31%)伴明显腰痛和(或)下肢痛,保守治疗无效,行翻修手术后症状缓解,1例有腰痛及臀部疼痛,建议行翻修手术但患者拒绝,随访55个月,cage移位未进展且椎间已融合。结论:骨质疏松、梨形椎间隙及螺钉松动是后路腰椎椎体间融合术后cage移位的独立危险因素;对于cage移位但无明显症状患者可行保守治疗及密切随访,对于有明显神经症状或不稳定者应行翻修手术治疗。

关键词：腰椎椎间融合术椎间融合器并发症翻修术