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Shell effect and capture cross sections in the synthesis of superheavy nuclei

Science China(Physics,Mechanics & Astronomy) 2009年第10期52卷 1489-1493页

作者： DU SaiSai1,2.BIAN BaoAn1,2.3,LIU Min1,2.4,FENG ZhaoQing5,6 & ZHANG FengShou1,2.6 1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal university,Beijing 100875,China 2.Beijing Radiation center,Beijing 100875,China 3 School of Science,Jiangnan university,Wuxi 2.412.,China 4 College of Physics and Technology,Guangxi Normal university,Guilin 541004,China 5 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 6 center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and Technology Beijing Normal University Beijing 100875 China Beijing Radiation center Beijing 100875 China School of Science Jiangnan University Wuxi 214122 China College of Physics and Technology Guangxi Normal University Guilin 541004 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China

The shell effect is included in the improved isospin dependent quantum molecular dynamics model in which the shell correction energy of the system is calculated by using the deformed two-center shell model. A switch function is introduced to connect the shell correction energy of the projectile and the target with that of the compound nucleus during the dynamical fusion process. It is found that the calculated capture cross sections reproduce the experimental data quantitatively at the energy near the Coulomb barrier. The capture cross sections for reaction 35 80 Br + 82.2.8 Pb → 117 2.8 X are also calculated and discussed.

关键词： superheavy nuclei transport theory shell effect cross sections

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Study of proton resonances in ^(18)Ne via resonant elastic scattering of ^(17)F+p and its astrophysical implication

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Science China(Physics,Mechanics & Astronomy) 2011年第S1期54卷 32-36页

作者： HE JianJun1, HU Jun1,2. XU ShiWei1, CHEN ZhiQiang1, ZHANG XueYing1, WANG JianSong1, YU XiangQing1, ZHANG LiYong1,2. LI Long1,2. YANG YanYun1,2. MA Peng1,2. ZHANG XueHeng1, HU ZhengGuo1, GUO ZhongYan1, XU Xing1,2. YUAN XiaoHua1, LU Wan1,2. YU YuHong1, ZANG YongDong1,2. TANG ShuWen1,2. YE RuiPing1,2. CHEN JinDa1,2. JIN ShiLun1,2. DU ChengMing1,2. WANG ShiTao1,2. MA JunBing1,2. LIU LongXiang1,2. BAI Zhen1,2. LEI XiangGuo1, SUN ZhiYu1, ZHANG YuHu1, ZHOU XiaoHong1, XU HuShan1, SU Jun3, LI ErTao3, WANG HongWei4, TIAN WenDong4 & LI XiangQing5 1 Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China 2.Graduate university of Chinese Academy of Sciences, Beijing 100049, China 3 China Institute of atomic Energy (CIAE), Beijing 102.13, China 4 Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Sciences, Shanghai 2.1800, China 5 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking university, Beijing 100871, China 1. Institute of Modern Physics (IMP) Chinese Academy of Sciences Lanzhou 730000 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. China Institute of Atomic Energy (CIAE) Beijing 102413 China4. Shanghai Institute of Applied Physics (SINAP) Chinese Academy of Sciences Shanghai 201800 China5. School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China

The proton resonant properties in 18Ne, which determine the reaction rate of the key stellar 14O(α,p)17F reaction, have been studied by using a technique of proton resonant elastic scattering of 17F+p. A 4.2. MeV/nucleon 17F radioactive ion (RI) beam was produced via a projectile-fragmentation reaction, and separated by a Radioactive Ion Beam Line in Lanzhou (RIBLL). By bombarding a thick (CH2.n target, the energy spectra of the recoiled protons were measured by two ΔE-E silicon telescopes at the center-of-mass scattering angles of θc.m.≈175°±5°, θc.m.≈152.±8°, respectively. Several proton resonances in 18Ne were ob served clearly. A further R-matrix analysis of the experimental data is under way to determine the resonant parameters. The present work reports the preliminary results briefly.

关键词： resonant reaction reaction rate explosive burning accreting binary systems

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He同位素对He-NO碰撞体系微分截面的影响

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物理学报 2008年第7期57卷 4138-4142页

作者：汪荣凯沈光先宋晓书令狐荣锋杨向东贵州师范大学理学院贵阳550001 四川大学原子与分子物理研究所成都610065

用密耦近似方法计算了同位素He原子与NO分子碰撞体系的总微分截面、弹性微分截面和非弹性微分截面,总结了同位素He原子对He-NO碰撞体系微分截面的影响.计算结果表明:在同一入射能量下,随着入射同位素He原子质量增加,总微分截面在0°时... 详细信息

用密耦近似方法计算了同位素He原子与NO分子碰撞体系的总微分截面、弹性微分截面和非弹性微分截面,总结了同位素He原子对He-NO碰撞体系微分截面的影响.计算结果表明:在同一入射能量下,随着入射同位素He原子质量增加,总微分截面在0°时的角分布逐渐增大;同位素He原子与NO分子碰撞发生的彩虹现象越明显.同时,体系约化质量增加的效应大于相对碰撞速度减小的效应,使散射振荡间隔逐渐减小.

关键词： He-NO 密耦近似微分截面同位素效应

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Investigation of changes in properties of water under the action of a magnetic field

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Science China(Physics,Mechanics & Astronomy) 2008年第11期51卷 1621-1632页

作者： PANG XiaoFeng1,2.& DENG Bo1 1 Institute of Life Science and Technology, university of Electronic Science and Technology of China, Chengdu 610054, China 2.International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China 1. Institute of Life Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China 2. International Centre for Materials Physics Chinese Academy of Sciences Shenyang 110015 China

The properties of water and their changes under the action of a magnetic field were gathered by the spectrum techniques of infrared, Raman, visible, ultraviolet and X-ray lights, which may give an insight into molecular and atomic structures of water. It was found that some properties of water were changed, and a lot of new and strange phenomena were discovered after magnetization. Magnetized water really has magnetism, which has been verified by a peak shift of X-ray diffraction of magnetized water + Fe3O4 hybrid relative to that of pure water + Fe3O4 hybrid, that is a saturation and memory effect. The properties of infrared and ultraviolet absorptions, Raman scattering and X-ray diffraction of magnetized water were greatly changed relative to those of pure water; their strengths of peaks were all increased, the frequencies of some peaks did also shift, and some new peaks, for example, at 5198, 8050 and 9340 cm?1, occurred at 2.°C after water was magnetized. In the meanwhile, the magnetized effects of water are related to the magnetized time, the intensity of an externally applied magnetic field, and the temperature of water, but they are not a linear relationship. The study also showed a lot of new and unusual properties of magnetized water, for example, the six peaks in 3000–3800 cm?1 in infrared absorption, the exponential increase of ultraviolet absorption of wave with the decreasing wavelength of light of 2.0–300 nm, the frequency-shifts of peaks, a strange irreversible effect in the increasing and decreasing processes, as well as a stronger peak of absorption occurring at 50°C, 70°C and 80°C, the existence of many models of motion from 85°C to 95°C in 8000–10000 cm?1, and so on. These results show that the molecular structure of water is very complicated, which needs further study. Furthermore, the macroscopic feature of mechanics, for instance, surface tension force of magnetized water, was also measured. Experiments discovered that the size in contact angle

关键词： pure water magnetized water magnetic-field physical property spectrum saturation and memory effect mechanical feature surface tension force polarization angles of contact

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Expression and function analysis of the metallo-thionein-like (MT-like) gene from Festuca rubra in Chlamydomonas reinhardtii chloroplast

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Science China(Life Sciences) 2008年第12期51卷 1076-1081页

作者： HAN SiHai1,2. HU ZhangLi1 & LEI AnPing1 1 Institute of Eco-Environment, College of Life Science, Shenzhen university, Shenzhen 518060, China 2.Research center for Analytical Instrumentation, State Key Lab of Industrial Control Technology, Institute of Cyber-Systems and Control, Zhejiang university, Hangzhou 310058, China 1. Institute of Eco-Environment College of Life Science Shenzhen University Shenzhen 518060 China 2. Research center for Analytical Instrumentation State Key Lab of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310058 China

The cDNA of the metallothionein-like (MT-like) gene from Festuca rubra cv. Merlin was optimized with bias codon of Chlamydomonous reinhardtii chloroplast genome. The optimized MT-like gene was de-livered into C. reinhardtii chloroplast and the transgenic strains expressing MT-like gene was obtained. PCR-Southern blot and RT-PCR-Southern blot analysis demonstrated that the MT-like gene was inte-grated into chloroplast genome of C. reinhardtii and expressed at the transcriptional level. The cad-mium binding capacity of the transgenic C. reinhardtii was determined by hydride generation-atomic fluorescence spectrometry (HG-AFS) and the binding properties were analyzed. Results showed that the transgenic C. reinhardtii expressing the MT-like gene exhibited remarkably higher Cd2. binding capacity and grew to higher densities at toxic Cd2. concentrations (40-100 μmol/L) than the wild type strain, and that the IC50 of Cd2. (3-d treating ) to algal cell growth of transgenic strain was 55.43% higher than that of the wild type strain, indicating that the Cd2. binding capacity and Cd2. tolerance of C. reinhardtii was enhanced through the expression of the foreign MT-like gene in chloroplast.

关键词： Chlamydomonas reinhardtii chloroplast metallothionein-like (MT-like) gene cadmium binding properties

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ECSTM study of adsorption of C_(60),C_(70),C_(86) and Y@C_(82. on Au(111)

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Science China Chemistry 2010年第8期53卷 1705-1710页

作者： SU GuiJin1,JIA ManKe1,GAN LiHua2.& SHI RuiFang1 1State Key Laboratory of Environmental Chemistry and Ecotoxicology Research center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 2.chool of Chemistry and Chemical Engineering,Southwest university,Chongqing 400715,China 1. State Key Laboratory of Environmental Chemistry and Ecotoxicology Research center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China2. School of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

The adsorption of a variety of fullerenes (C60,C70,C86,Y@C82. on Au(111) electrode surfaces was comprehensively investigated in 0.1 M HClO4 by electrochemical scanning tunneling microscopy (ECSTM).In the ordered C60's adlayer,C60 molecules formed either (2.1/3) × 2.3～(1/3))or "in-phase" *** high resolution STM image shows that the C60 cage is not simply round but shows a bifurcated *** adsorption orientation of C60 on Au(111) is tentatively *** the ordered C70's adlayer,the perpendicular fullerene molecules are the main adsorption mode and form (2.3～(1/3) × 2.3～(1/3)) ***,for C86 and Y@C82.the ordered adlayer could not be obtained on Au(111) under the present *** differences may be due to the different molecular shapes and sizes,and the encapsulated metal atom which affects the lattice matches with the *** adsorption of fullerene molecules on Au(111) from disorder to order could be tuned simply by steering the dimensional sizes or shapes of the fullerenes used.

关键词： C60 C70 C86 Y@C82 ECSTM Au(111)

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Nanomechanical Properties of molecular Deposition Film

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Journal of Wuhan university of Technology(Materials Science) 2005年第3期20卷 20-22页

作者：兰惠清 School of Mechanical Electronic and Control Engineering Beijing Jiaotong University

Two nanomechanical properties of the moleculor deposition （ MD ） film deposited on the Au substrate were studied. The first is its nanotribological property investigated by an atomic force microscope, which indicates that the deposition of the MD film could reduce the frictional force. The second is its nanoindent property studied by a nano-indenter. The results show that, after the MD film is deposited on the Au substrate , the elastic modulus, hardness and load decreased all, moreover, the elastic deformation increased and the plastic deformation decreased, which indicates that the MD film can improve the nanomechanical properties of the Au substrate.

关键词： molecular deposition film atomic force miroscope nanomechanical properties nanoindent

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Calculation of triaxial superdeformation in ^(174)Hf

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Science China(Physics,Mechanics & Astronomy) 2007年第5期50卷 553-557页

作者： YU ShaoYing1,2.4, LI XiaoWei2. SHEN CaiWan1,5 & CHEN YongShou3,4 1 School of Science, Huzhou Teachers College, Huzhou 313000, China 2.College of Mathematics, Physics and Information Engineering, Zhejiang Normal university, Jinhua 32.000, China 3 China Institute of atomic Energy, Beijing 102.13, China 4 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China 5 {2. of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China 1. School of Science Huzhou Teachers College Huzhou 313000 China 2. College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua 321000 China 4. Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China 5. center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China 3. China Institute of atomic Energy Beijing 102413 China

A two-dimensional Total Routhian Surface (TRS) calculation with the fixed hexa- decapole deformation ε4 = 0.03 was carried out for several configurations of 174Hf. Results indicate that the shell corrections have an important contribution to the formation of triaxial superdeformation in 174Hf and some possible configuration assignments are made to the 4 TSD bands experimentally found in 174Hf.

关键词： Total Routhian Surface (TRS), triaxial superdeformation, configuration

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Sphingosylphosphorylcholine stimulates human monocyte-derived dendritic cell chemotaxis

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Acta Pharmacologica Sinica 2006年第10期27卷 1359-1366页

作者： Ha-young LEE~(2.3,4) Eun-ha SHIN~(2.4) Yoe-sik BAE~(2.3,5) ~2.edical Research center for Cancer molecular Therapy,College of Medicine,Dong-A {2.,Busan 602.714,Korea,~3Department of Biochemistry,College of Medicine,Dong-A {2.,Busan 602.714,Korea Medical Research center for Cancer molecular Therapy College of Medicine Dong-A University Busan 602-714 Korea

Aim:To investigate the effects of sphingosylphosphorylcholine(SPC)on humanmonocyte-derived dendritic cell(DC)***:Human DC were gen-erated from peripheral blood monocytes by culturing them with granulocyte mac-rophage-colony stimulating factor and *** effect of SPC on the DCchemotactic migration was measured by chemotaxis *** signalingevent involved in the SPC-induced DC chemotaxis was investigated with severalinhibitors for specific *** expression of the SPC receptors was examinedby reverse transcription polymerase chain ***:We found that SPCinduced chemotactic migration in immature DC(iDC)and mature DC(mDC).Interms of SPC-induced signaling events,mitogen activated protein kinase activa-tion and Akt activation in iDC and mDC were ***-induced chemotaxiswas mediated by extracellular signal-regulated protein kinase and phosphoino-sitide-3-kinase,but not by calcium in both iDC and *** mDC expressovarian cancer G protein-coupled receptor 1,but not G protein-coupled receptor 4,iDC do not express any of these *** examine the involvement of sphin-gosine-1-phosphate(S1P)receptors,we checked the effect of an S1P receptorantagonist(VPC2.019)on SPC-induced DC ***2.019 did not affectSPC-induced DC ***:The results suggest that SPC may playa role in regulating DC trafficking during phagocytosis and the T cell-stimulatingphase,and the unique SPC receptor,which is different from SIP receptors,isinvolved in SPC-induced chemotaxis.

关键词： dendritic cells sphingosylphosphorylcho line chemotaxis pertussis toxin-sensitive G protein extracellular signal regulated protein kinase

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Synthesis of superheavy nuclei with ^(2.8)U target

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Science China(Physics,Mechanics & Astronomy) 2009年第10期52卷 1482-1488页

作者： LIU ZuHua1,3 & BAO JingDong2.4 1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,Beijing Normal university,Beijing 100875,China 2.Department of Physics,Beijing Normal university,Beijing 100875,China 3 China Institute of {2. Energy,Beijing 102.13,China 4 center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing 100875 China Department of Physics Beijing Normal University Beijing 100875 China China Institute of atomic Energy Beijing 102413 China center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China

The production of superheavy nuclei with Z=108-116 via hot fusion reactions of the neutron-rich projectiles with 2.8U target is systematically *** results show that the production cross sections of superheavy nuclei do not decrease monotonously as the atomic number Z *** cross sections of the superheavy nuclei at Z = 112.and 115 are enhanced as compared with the whole Z-trend in synthesis of the superheavy nuclei,which clearly illustrates that the reactions with large negative Q-value and shell correction are more favorable to synthesize superheavy nuclei.

关键词： superheavy nuclei fusion reaction cross section 2.8U target

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