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物理学报 2003年第6期52卷 1340-1345页

作者：吴双清曾瑜蔡勖闫沐霖中国科学技术大学交叉学科理论研究中心合肥230026 中国科学院高能物理研究所北京100039 华中师范大学粒子物理研究所武汉430079

利用推广的乌龟坐标变换法研究了作变加速直线运动的Kinnersley黑洞中Weyl中微子的量子热效应 ,导出了局部的事件视界面方程和Hawking温度以及中微子的热辐射谱 .结果表明视界的位置和温度不仅随时间变化。

关键词：变加速直线运动黑洞 Weyl中微子 Hawking辐射广义乌龟坐标变换法量子热效应

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北京同步辐射装置上的位相衬度成像

物理学报 2002年第5期51卷 1040-1043页

作者：黄万霞田玉莲朱佩平麦振洪胡小方中国科学院高能物理研究所北京100039 中国科学院物理研究所北京100080 中国科学技术大学合肥230027

在北京同步辐射装置上首次用位相衬度成像方法对生物样品和复合材料进行研究 ,得到了非常清晰而精细的材料内部细观结构 .

关键词：位相衬度成像相干光源硬X射线生物样品无损检测复合材料北京同步辐射装置

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同步辐射小角散射实验站探测系统的改进

生物化学与生物物理进展 1997年第3期24卷 258-260页

作者：生文君杨恒林张志杰董宝中中国科学院高能物理研究所北京100039

同步辐射小角X射线散射 (SAXS)实验站所用的探测器由原来的NaI闪烁计数器改为位置灵敏探测器 ,其位置分辨好于 1 0 0 μm ,有效探测面积为 50mm× 1 0mm ,得到了较以往更高质量的SAXS谱 ,并成功地对液体样品的SAXS谱进行了测试 .

关键词：小角散射位置灵敏探测器同步辐射

The X-ray emission from the knots in 3C 12.

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science china({2.,Mechanics & Astronomy) 2010年第S1期53卷 212-215页

作者： ZHANG Jin1,2.3 & LI ShaoKun1,3 1 National Astronomical Observatories/Yunnan Observatory,chinese academy of {2.s,Kunming 650011,china 2.College of physics and Electronic Engineering,Guangxi Teachers Education University,Nanning 53002.,china 3 Graduate University of the chinese academy of sciences,beijing 100049,china 1. National Astronomical Observatories/Yunnan Observatory Chinese Academy of Sciences Kunming 650011 China 2. College of physics and Electronic Engineering Guangxi Teachers Education University Nanning 530023 China 3. Graduate University of the chinese academy of sciences Beijing 100049 China

3C 12. is a Seyfert galaxy with a well detected X-ray *** investigate the X-ray emission of its five jet knots and fit their spectral energy distributions(SEDs) from the radio to the X-ray bands with a single-zone lepton *** find that the SEDs of knots k7,s2.and s3 can be explained by synchrotron {2.,and the X-rays are the simple extension of the radio-optical emission component,but that of the inner knot k4 requires the IC/CMB model,in which the X-rays are due to the inverse Compton scattering of the cosmic microwave background photons by relativistic electrons in the jet with a beaming factor δ-*** outer knot k2. is resolved into a three-part *** is shown that the fitting of the X-rays from this knot with the IC/CMB model needs an extraordinary beaming factor δ-15-2. for a jet at the kpc *** the X-rays of knot k2. are produced by synchrotron {2. similar to k7,s2.and s3,they may be contributed by a relativistic electron population whose {2.s in other wavelengths are not detected.

关键词： 3C 12. knots X-rays non-thermal emission

自由电子激光对GaAs/AlGaAs异质结构材料电学性质的影响

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中国激光 2003年第7期30卷 593-596页

作者：张猛林理彬邹睿张国庆李永贵四川大学物理系辐射物理及技术教育部重点实验室四川成都610064 中国科学院高能物理所自由电子激光研究室北京100080

自由电子激光(FEL)辐照样品前和辐照样品时,使用变温霍尔测量系统测试了这种n型调制掺杂GaAs/AlGaAs异质结构材料中准二维电子气(2.EG)的迁移率、电子浓度和电阻率。对比这两种情况下的结果可以发现:1)迁移率随温度升高而降低,光照使迁... 详细信息

自由电子激光(FEL)辐照样品前和辐照样品时,使用变温霍尔测量系统测试了这种n型调制掺杂GaAs/AlGaAs异质结构材料中准二维电子气(2.EG)的迁移率、电子浓度和电阻率。对比这两种情况下的结果可以发现:1)迁移率随温度升高而降低,光照使迁移率增大;2.电子浓度随温度变化关系相对较为复杂,但是平均而言,光照会使电子浓度减小;3)电阻率随温度升高而升高,光照使电阻率减小,但这种影响不明显。对这些现象给出了具体的分析。

关键词：激光技术电学性质自由电子激光异质结构材料二维电子气辐照效应

Effect of Sequential Ions Implantation on Structure of Cu, Ag Nanoparticles

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Effect of Sequential Ions Implantation on Structure of Cu, A...

中国硅酸盐学会特种玻璃分会第三届全国特种玻璃会议

作者： XIAO Xiang-heng,LU Zhuoyu,GUO Li-ping, REN Feng, CHEN Dong-liang,WU Zi-yu,JIA Quan-jie ( Key laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072. china Department of {2., Wuhan University, Wuhan 430072. china beijing synchrotron radiation Facility, institute of high energy physics, CAS,beijing 100049, china)

The preparation of metal nanoparticles composites by Cu, Ag ions sequential implantation is studied. The formation of Cu, Ag nanoparticles has been evidenced by grazing incidence X-ray diffraction, extended x-ray absorption fine structure and transmission electron microscopy. With the increase of Ag ion implantation dose, the size and density of Ag nanoparticles increase significantly.

关键词： ion implantation nanoparticles

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衍射异常精细结构(DAFS)谱及其应用

物理学进展 1997年第3期17卷 250-264页

作者：吴忠华王德武蒋海音刘建飞中国科学院高能物理研究所同步辐射实验室北京100039

本文对近年来正在发展中的DAFS技术,从原理、实验方法、数据处理到DAFS技术的应用及其前景作了一个简要的综述性介绍。

关键词：原子散射 DAFS 异常散射数据处理

Size-dependent translocation pattern,chemical and biological transformation of ferric oxide nanoparticles in the central nervous system

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Size-dependent translocation pattern,chemical and biological...

On projected gradient methods for regularizing reconstruction of synchrotron radiation spectra distribution function

中国毒理学会第三届中青年学者科技论坛暨2.11年全国前列腺药理毒理学研讨会

作者： Bing Wang,~+ Ming Li,~+ Yun Wang,~+ Meng Wang,~+ Hong Ouyang,~+ Jing Zhang,Dong L. Chen,Zhi F.Chai,~+ Wei Y.Feng,~(+*)and Yu L.Zhao~(+*) + laboratory for Bio-Medical Effects of Nanomaterials and Nanosafety and Key laboratory of Nuclear Analytical Techniques,{2. of high energy physics,chinese academy of sciences,beijing 100049,china beijing {12. radiation Facility,{2. of high energy physics,beijing 100049, china

The toxic effects or biomedical functions of nanoparticles largely depend on their translocation ***,because of a large number of variable parameters of nanoparticles,experimental measurements of each type of nanoparticles in vivo become a huge work and almost ***,establishing theoretical models for rapid analyses will be beneficial to both safety estimation and application of *** the present study,the size-dependent translocation mode and biological fate of intranasally instilled FeO nanoparticles(40 nm and 2.0 nm)in CNS were *** nanoparticle translocation in different parts of brain at 4h,12.,2.h,3d,7d,and 30d were quantified using ICP-MS technique.A biexponential model(correlation coefficient r=0.98～0.99)was satisfactory to describe the particokinetic translocation behavior of FeO nanoparticles in *** found a size-dependent translocation pattern and a size-sensitive time-window(4-72.h)of the nanoparticles in the brain,which are most significant in toxic concerns of nanoparticles in the *** synchrotron-based techniques such as microbeam X ray fluorescence(SR-μXRF) and near-edge X-ray absorption spectroscopy(XANES)were then used to map the spatial microdistribution and to identify the chemical forms of the nanoparticles in brain,respectively. The SR-μXRF images showed the 40 nm-FeO particles more widely distributed in brain regions than the large FeO particle *** XANES results indicate that the presence of chemical speciation of the FeO nanoparticle(～15%)and protein-complex like apotransferrin-FeO(～16%)in brain,implying that self-coating of FeO nanoparticles occurred with transferrin in *** but not the least,all the findings suggest size-sensitive manners of nanoparticles in brain,the smaller one possesses evident detention properties in the CNS *** larger one.

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On projected gradient methods for regularizing reconstructio...

具有原子分辨率的x射线荧光全息术的数值模拟研究

中国科学院地质与地球物理研究所2.08学术年会

作者： Yanfei Wang~(1,*),Yonghua Du~2.and Tiandou Hu~2.1 institute of Geology and Geophysics,{2. academy of sciences,P.O.Box 982.,beijing,10002.,P.R.china. 2.7},{2. academy of sciences,beijing,P.R.china.

We study the numerical methods for the reconstruction of the spectral distribution function of SR by measurement of the attenuation of the SR energy *** reconstruction of the spectral distribution function of SR is an ill-posed integral operator equation of the first ***,robust method to overcome the ill-posedness and to improve the computational efficiency is a major task in numerical *** of the physical meaning of the problem,we study projected gradient methods in this *** simulations are given.

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物理学报 2003年第9期52卷 2223-2228页

作者：谢红兰高鸿奕陈建文王■越朱佩平熊诗圣洗鼎昌徐至展中国科学院上海光学精密机械研究所上海201800 中国科学院高能物理研究所北京100039

根据x射线荧光全息术的成像原理 ,对体心立方晶系的Fe单晶进行了数值模拟 (包括荧光全息图及其重构像 ) ,在各个晶面 ( 0 0 1,0 10 ,10 0 )上得到Fe原子的像 ,与Fe的晶格模型的原子位置一致 ,表明运用这种x射线荧光全息术。

关键词： x射线荧光全息术同步辐射晶体结构傅里叶变换数值模拟原子分辨率 Fe单晶荧光全息图