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Nano-Structure Observed in Highly Doped Silicon Crystalline

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Journal of Materials Science & Technology 1993年第3期9卷 232-234页

作者： Zhiheng LU department of physics,{2. Normal University,{2.,100875,chinaDachan WANG Yan LUO institute of Low energy nuclear physics,{2. Normal University,{2.,100875,china

It was reported that due to the non-linear electrical phenomena,the super-saturated arsenic in silicon single crystalline precipitates during post processing at low temperatures to form different *** structure with sp... 详细信息

关键词： nano-structure silicon semiconductor materials

Nonlinear feedback synchronization of hyperchaos in higher dimensional systems

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nuclear Science and Techniques 1997年第4期 1-7页

作者： Fang Jin Qing ( china institute of atomic energy, beijing 102413) Ali M K ( {2. of physics, The University of Lethbridge,Lethbridge, Alberta T1K 3M4, Canada)

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关键词： Hyperchaos Synchronization Nonlinear feedback functions Ten dimension.

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

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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

Control of Melt Structures on Cu-Au Mineralization in Basic-Ultrabasic Complexes of Northern china

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Acta Geologica Sinica(English Edition) 2000年第4期74卷 786-794页

作者： YUAN Wanming institute of High energy {2., Chinese Academy of Sciences, beijing 100080and MO Xuanxue china University of Geoscienses, beijing 100083 institute of High energy {2. Chinese Academy of Sciences Beijing 100080 china University of Geoscienses Beijing 100083 [?]3Yuan Wanming Born in April 1956 graduated from Hebei College of Geology in 1982. He was once engaged in teaching in Hebei College of Geology for many years and acquired M.Sc and Ph.D degrees in petrology at china University of Geosciences (Wuhan) and china University of Geosciences ({2.) in 1989 and 1997 respectively. Dr. Yuan now works with the institute of High energy physics Chinese Academy of Sciences doing postdoctoral research work. His interests are mainly nuclear techniques and their applications to geology. E-mail: panm@***.

Based on systematic analyses of 72.samples of different basic-ultrabasic rocks, the present paper discusses the relationship between melt structure and Cu and Au mineralization. It is found that if the NBO/T, NBO, M2., FeO and MgO values are relatively high and the T, M3+, Fe2.3 and CaO values are low the basic-ultrabasic melt will be favourable to Cu (Ni) mineralization, but if the former are low and the latter are high it is favourable to Au metallization. Cu ions occupy dominantly octahedra in basic-ultrabasic melt and the higher the NBO/T, NBO and M2. values, the more the octahedra in the melt. Au element mainly takes the form of Au+ ions in basic-ultrabasic melt and the Au+ ions constitute tetrahedral sites together with Fe3+ ions. Therefore, low M2. and high Fe3+, i.e. high oxygen fu-gacity, can promote the enrichment of Au+ ions and Au mineralization. Components NT (other than Au+), Al2.3 and SiO2.in basic-ultrabasic melt have no effect on metallogenetic species. As mentioned above, in relevant diagrams distribution areas of the characteristic values of ore-free melt and those of ore-forming melt are overlapped in different degrees, which possibly indicates that not all the magmas have mineralizing ability. It can be well distinguished whether basic-ultrabasic rocks are favourable to Cu or Au mineralization or they are just ore-free rocks by analysing integrated diagrams of the characteristic values of the magmatic melt structure.

关键词： melt structure Cu-Au mineralization basic-ultrabasic complex

Measurement of Neutron Capture Cross Section for ^(180)Hf

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Chinese journal of nuclear physics 1997年第2期19卷 110-114页

作者： Chen Jinxiang Shi Zhaomin Tang Guoyou Zhang Guohui institute of Heavy Ion physics,Peking University,{2. 100871Lu Hanlin Han Xiaogang Huang Xiaolong china institute of atomic energy,P.O.Box 2.5(3),{2. 102413 北京大学重离子物理所北京中国原子能科学院北京

The neutron capture cross section for 180Hf relative to the 197Au（n,γ）198Au reaction ismeasured at neutron energies of 0.52.1.10 and 1.60 MeV using the activation *** of the products are measured with a high resolution HPGe detector gamma ray *** errors of the measured results are 5%～6%.Our results have a good agreementwith those of other authors within *** sections for the reaction are calculated withUNF code and recommended data are also given.

关键词： 100Hf 198Au Neutron capture cross section Activition method

A scheme for the RCP pattern of the nano-structure

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Communications in Nonlinear Science and Numerical Simulation 2001年第4期6卷 201-204页

作者： Guangwu YAN, Hongxue QU and Bing YAN department of Mathematics, Jilin University, Changchun 130012. china {2. of atomic and Molecular physics, Jilin University. Changchun 13002., china department of Mathematics Juin University Changchun 130012 China Inst. of Atom. and Molecular physics Jilin University Changchun 130023 China

A new scheme for the Random-Continuous-Pile (RCP) pattern is proposed to simulate a two-dimensional structure The RCP pattern is plotted.

关键词： RCP pattern. Maxwell distribution balls-filling

Systematic study of survival probability of excited superheavy nuclei

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 109-113页

作者： XIA ChengJun1, SUN BaoXi1, ZHAO EnGuang2.3 & ZHOU ShanGui2.3 1College of Applied Sciences, beijing University of Technology, beijing 10012.,{2. 2.3} of Theoretical physics, Chinese Academy of Sciences, beijing 100190,{2. 3Center of Theoretical nuclear physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,{2. Chinese Acad Sci Inst Theoret Phys Beijing 100190 Peoples R China beijing Univ Technol Coll Appl Sci Beijing 100124 Peoples R China Ctr Theoret Nucl Phys Natl Lab Heavy Ion Accelerator Lanzhou 730000 Peoples R China

The stability of excited superheavy nuclei (SHN) with 100 Z 134 against neutron emission and fission is investigated by using a statistical model. In particular, a systematic study of the survival probability against fission in the 1n-channel of these SHN is made. The present calculations consistently take the neutron separation energies and shell correction energies from the calculated results of the finite range droplet model which predicts an island of stability of SHN around Z = 115 and N = 179. It turns out that this island of stability persists for excited SHN in the sense that the calculated survival probabilities in the 1n-channel of excited SHN at the optimal excitation energy are maximized around Z = 115 and N = 179. This indicates that the survival probability in the 1n-channel is mainly determined by the nuclear shell effects.

关键词： survival probability superheavy elements island of stability neutron emission fission

Mass Measurement of ^(12.)Cd and the New Levels of ^(12.,12.)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 2.5(10),beijing {2. 中国原子能科学院北京

The mass excess of the neutron-rich nucleus 12.Cd is measured by transfer reactions12.Sn(18O,2.Ne)12.Cd and 12.Sn(18O,2.Ne)12.*** value is derived to be -80.73±0.04 *** addition,a few new levels of 12..12.Cd are obse... 详细信息

关键词： Mass measurement 12.Cd Transfer reaction

Electronic structure and magnetic properties of SmCo7-xTix

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Science china(physics,Mechanics & Astronomy) 2006年第1期49卷 38-45页

作者： ZHANG Changwen1, LI Hua1, DONG Jianmin1, GUO Yongquan2.& LI Wei2.1. School of physics and Microelectronics, Shandong University, Jinan 2.0100, china 2. {2. of Functional Materials, Central Iron and Steel Research {2., beijing 100081, china 1. School of physics and Microelectronics Shandong University Jinan 250100 China 2. institute of Functional Materials Central Iron and Steel Research Institute Beijing 100081 China

Electronic structure of SmCo7-xTix alloy has been studied by means of the spin-polarized MS-Xα method. It is shown that a few of electrons are transferred to Sm(5d) orbital due to orbital hybridization between Sm and Co atoms. The exchange interaction between 5d-3d electrons is stronger, which is the main reason resulting in the long-range ferromagnetic order between Co and Sm atoms. The Curie temperature of SmCo7-xTix is generally lower than that of pure Co metal, which may be explained by the weaker aver- age of coupling strength between Co sites due to some negative exchange couplings occurring mainly at 2. site. The calculated results for the Sm5Co2.Ti6 cluster may lead to a better understanding of why SmCo7-xTix is stable phase. Since the negative interaction of 2. sites weakens and the bonding at EF strengthens with increasing Ti concentration, which result in the decrease in the free energy of the alloy, the stable ferromagnetic order forms inside SmCo7-xTix. Considering the localization of 4f states and 5d moment arising from the orbital hybridization, the calculated moment is 9.47μB per formula unit that is in agreement with experiments.

关键词： electronic structure, spin polarization, atomic magnetic moment, exchange coupling, Curie temperature.