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Two－Side　Electron　Beam　Pumping　System　For　Hundred－Joule－Level　KrF　Excimer　Laser

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Chinese Journal of Lasers 1996年第6期B5卷 485-491页

作者： MA Weiyi SHAN Yusheng ZHOU Kungong WANG Youtian ZHANG Dong WU Fangfang YANG Zhe WANG Naiyan (China institute of atomic energy, P. O. for 275-7, {3. 102413.China) China Inst of atomic energy Beijing China

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关键词： KrF excimer laser pulsed power system

Threading dislocation density comparison between GaN grown on the patterned and conventional sapphire substrate by high resolution X-ray diffraction

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Science China(Physics,Mechanics & Astronomy) 2010年第3期53卷 465-468页

作者： ZHANG YuChao1, XING ZhiGang2, MA ZiGuang2, CHEN Yao2, DING GuoJian2, XU PeiQiang2, DONG ChenMing3. CHEN Hong2 & LE XiaoYun1 1 School of Physics and Nuclear energy Engineering, Beihang University, beijing 100190, China 2 Renewable energy Laboratory, {3. of Physics, Chinese Academy of Sciences, beijing 100190, China 3.School of Information and Communication, Tianjin Polytechnic University, Tianjin 3.0160, China 1. School of Physics and Nuclear energy Engineering Beihang University Beijing 100190 China2. Renewable Energy Laboratory Institute of Physics Chinese Academy of Sciences Beijing 100190 China3. School of Information and Communication Tianjin Polytechnic University Tianjin 300160 China

GaN epifilms are grown on the patterned sapphire substrates (PSS) (0001) and the conventional sapphire substrates (CSS) (0001) by metal-organic chemical vapor deposition (MOCVD) using a novel two-step growth. High resolution X-ray diffraction (HR-XRD) is used to investigate the threading dislocation (TD) density of the GaN epifilms. The TD density is calculated from the ω-scans full width at half maximum (FWHM) results of HR-XRD. The edge dislocation destiny of GaN grown on the PSS is 2.7×108 cm-2, which is less than on the CSS. This is confirmed by the results of atomic force microscopy (AFM) measurement. The lower TD destiny indicates that the crystalline quality of the GaN epifilms grown on the PSS is improved compared to GaN epifilms grown on the CSS. The residual strains of GaN grown on the PSS and CSS are compared by Raman Scattering spectra. It is clearly seen that the residual strain in the GaN grown on PSS is lower than on the CSS.

关键词： GaN patterned sapphire substrate threading dislocation XRD

Mass Measurement of ^(122)Cd and the New Levels of ^(120,122)Cd

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Chinese journal of nuclear physics 1997年第3期19卷 180-184页

作者： Guo Jiyu Zhao Kui Lu Xiuqin Cheng Yehao Li Tianxin Fu Changbo Li Shuyuan China institute of atomic energy,P.O.Box 275(10),{3. 102413 中国原子能科学院北京

The mass excess of the neutron-rich nucleus 122Cd is measured by transfer reactions122Sn(18O,20Ne)120Cd and 124Sn(18O,20Ne)122*** value is derived to be -80.73.0.04 *** addition,a few new levels of 120.122Cd are obse... 详细信息

关键词： Mass measurement 122Cd Transfer reaction

Study of the effect of atorvastatin on the interaction between ICAM-1 and CD11b by live-cell single-molecule force spectroscopy

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Science China Chemistry 2010年第4期53卷 752-758页

作者： LI Yi1, SHI XiaoLi2, LIU HuiLiang1, YI ShaoQiong3. ZHANG XueJie2 & FANG XiaoHong2 1Department of Cardiology, the General Hospital of Chinese People’s Armed Police Forces, beijing 10003., China 2beijing National Laboratory for Molecular Sciences institute of Chemistry, Chinese Academy of Sciences, beijing 100190, China 3.tate Key Laboratory of Pathogen and Biosecurity beijing institute of Microbiology and Epidemiology, beijing 100071, China 1. Department of Cardiology the General Hospital of Chinese People’s Armed Police Forces Beijing 100039 China2. Beijing National Laboratory for Molecular Sciences Chinese Academy of Sciences Beijing 100190 China4. Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China3. State Key Laboratory of Pathogen and Biosecurity Beijing 100071 China5. Beijing Institute of Microbiology and Epidemiology Beijing 100071 China

The interaction between the cell adhesion molecule CD11b and its ligand ICAM-1 plays an important role in inflammatory responses in the disease of atherosclerosis. Atorvastatin is a commonly prescribed statin drug which has been considered as one of the most potent therapeutic agents for atherosclerosis due to its lipid-lowering effect. Recently, there is a growing body of evidence that atorvastatin has anti-inflammatory effect. We have applied the advanced method of live-cell single-molecule force spectroscopy to investigate the effect of atorvastatin on adhesion force between ICAM-1 and CD11b. Our result showed that single-molecule binding force of ICAM-1 and CD11b detected by AFM in the living cells was about 40 pN, and atorvastatin did not affect this force by blocking ICAM-1 or CD11b. This was different from the ICAM-1 monoclonal antibody, which could directly reduce the binding force of ICAM-1 and CD11b. Flow cytometry results revealed that atorvastatin pretreatment decreased the ICAM-1 expression in TNF-α activated HUVECs, which may contribute to its anti-inflammatory effect. The study provides a new approach to study anti-inflammatory mechanism for clinic drugs.

关键词： atherosclerosis atorvastatin atomic force microscopy single-molecule force spectroscopy protein-protein interaction

Estimation of Soot and Airborne Radionuclide Emission Factors from Coal-Fired Power Plants in China

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Estimation of Soot and Airborne Radionuclide Emission Factor...

STUDIES ON THE BHQ ICE CORE FROM THE LAW DOME, ANTARCTICA

The Second Asian and Oceanic Congress for Radiation Protection

作者： JIANG Ziying1 3. PAN Ziqiang2, LIU Senlin1, CHENG Jianping3. WANG Jue3. WANG Chunhong1 1. Division of Health Physics, China institute of atomic energy, {3., China 2. Science & Technology Committee, CNNC, {3., China 3. Department of Engineering Physics, Tsinghua University, {3., China

As main energy resource in China, coal-fired power is one of the major causes of atmosphere pollution. Comparison of environment impacts for coal, nuclear and other energy provides important information for energy sustainable development decision-making. Study on soot and airborne radionuclide emission factors for coal-fired power plants is important part as atmosphere environment impacts of coal energy. Based on the data that effect soot emission, such as installed capacity, dust removal technique, boiler and combustion conditions of coal-fired power plant at present in China, three type emission levels （high, middle and low） of coal-fired plants are analyzed and the general soot emission factor is estimated with the result: 4.4g/kWh. It is much higher in China than foreign advanced countries’ level and the main reasons are: high energy consumption of electricity production, various levels of dust precipitation and low efficiency in whole, and some high pollution, low parameters and small capacity coal-fired plants still taking certain proportion. With soot some natural radionuclide and their descendant （U series, Th series and 40K） in coal emit to atmosphere. Based on collection and analysis of survey data and experiment results on radionuclide content in coal and coal-fired ashes, the airborne radionuclide emission factors are estimated with the results: 226Ra is 0.68Bq/kWh, 23.Th is 0.56Bq/kWh, 23.U is 0.74Bq/kWh, 210Pb is 3.54Bq/kWh, 210Po is 2.79Bq/kWh and 40K is 1.3.Bq/kWh, which perform the practical emission level for coal-fired power plant in China.

关键词： soot radionuclide emission factor coal-fired power plant

来源： cnki会议评论

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极地研究 1990年第1期 20-26页

作者： Huang Maohuan Li Jun Xie Zichu(Lanzhou institute of Glaciology and Geocryology, Academia Sinica, Lanzhou 73.000)Zhang Yunhui(institute of atomic {3., beijing 102413. China)

The structure of the ice core varies with depth, Its surface layer is firn, followed by an ice layer with random fabric pattern (beginning at 28m depth), then transformed to a small circle girdle pattern (beginning at 147 m depth) through a transition layer, finally to a single-maximum pattern (beginning at 191 m depth). The stratigraphic profile of the ice core is similar to those of other cores on the Law Dome, For BHQ located in the middle of a flow line from the summit to the coast, the initial depth of every specific layer is less than that in the upstream and larger than that in the downstream. The ice was analyzed for trace elememts using instrumental neutron activation technique. No tendency towards a systematic increase or decrease in the element concentrations in the past 4000 years has been found. The mean concentrations of Na and Al over the past 4000 years are higher than those in the Vostok ice core by factors of 9 and 4, respectively.

关键词： BHQ ice core ice structure trace elements Law Dome Antarctica.

Cross Sections of ^(109)Ag(n,2n)^(108)Ag^m,^(151)Eu(n,2n)^(150)Eu^m,^(159)Tb(n,2n)^(158)Tb and ^(179)Hf(n,2n) ^(178)Hfm^2 Reactions

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Chinese journal of nuclear physics 1995年第3期17卷 268-270页

作者： Yu Wei-xiang Zhao Wen-rong Cheng Jiang-tao Lu Han-lin China institute of atomic energy,P.O.Box 275(3.,{3. 102413 中国原子能科学院北京

The cross sections for the formation of long-lived products 108Agm（6+,43.a）,150Eum（5-,3..9a）,158Tb（3.,180a）and 178Hfm2（16+,3.a）are measured in the（n,2n）reaction on the elementsof 109Ag,151Eu,159Tb and 79Hf a... 详细信息

The cross sections for the formation of long-lived products 108Agm（6+,43.a）,150Eum（5-,3..9a）,158Tb（3.sup>-,180a）and 178Hfm2（16+,3.a）are measured in the（n,2n）reaction on the elementsof 109Ag,151Eu,159Tb and 79Hf at neutron energies of 9.5 MeV and 0.9 MeV,*** neu-tron fluence is obtained through the 197Au（n,2n）196Au *** D（d,n）3./sup>He reaction is used as neu-tron source at the tandem *** present results are compared with the averaged values of theo-retical cross sections and the experimental data.

关键词： Long-lived radionuclides 108Agm 150Eum 158Tb 179Hf

NEUMANN SERIES SOLUTION TO A NEUTRON TRANSPORT EQUATION OF SLAB GEOMETRY

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Systems Science and Mathematical Sciences 1993年第1期6卷 13-17页

作者： WANG Zaihua YANG Mingzhu QIN Guoqiang institute of atomic energy,{3. 102413.China College of Engineer Corps, Nanjing 210007, China 北京原子能所北京南京陆军工程学院江苏南京

This paper deals with the solution to an energy, dependent stationary neutrontransport equation of slab geometry. In L^p space, the equation is converted into an equiva-lent integral equation. By the study of the corresponding integral operator and its spectralradius, results of Neumann series solution are obtained, and an easy-verified condition thatthe transport equation has a nonnegative solution is given.

关键词： Neutron transport equation series solution spectral radius

A possible proton pygmy resonance in ^(17)Ne

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Science China(Physics,Mechanics & Astronomy) 2011年第S1期54卷 49-52页

作者： MA ZhongYu1,2 & TIAN Yuan1 1 China institute of atomic energy, {3. 102413. China 2 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Collision, Lanzhou 73.000, China 1. China institute of atomic energy Beijing 102413 China2. Center of Theoretical Nuclear Physics National Laboratory of Heavy Collision Lanzhou 730000 China

The low-lying electric dipole strengths in proton-rich nuclei 17F and 17Ne, which can be produced at HIRFL-CSR in Lanzhou, are investigated. In the framework of the covariant density functional theory the self-consistent relativistic Hartree Bogoliubov model and the relativistic quasiparticle random phase approximation with the NL3.parameter set and Gogny pairing interaction are adopted in the calculations. A pronounced dipole peak appears below 10 MeV in17Ne, but does not occur in 17F. The prop erties of this low-lying E1 excitation in 17Ne are studied, which may correspond to a proton pygmy resonance with different characteristics from those of giant dipole resonance.

关键词： proton pygmy resonance relativistic Hartree-Bogoliubov model relativistic quasiparticle random phase approximation