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Properties of the 3/2.-[52.] band in the odd-N rare-earth nuclei

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 37-43页

作者： CHEN Liang1,2. ZHOU XiaoHong1,2. ZHANG YuHu1, ZHANG ShuangQuan3 & ZHU LiHua4 1institute of Modern physics, {2. academy of Sciences, lanzhou 730000, china 2.raduate University of {2. academy of Sciences, Beijing 100049, china 3State Key Laboratory of Nuclear physics and Technology, School of physics, Peking University, Beijing 100871, china 4china institute of Atomic Energy, Beijing 102.13, china 1. institute of Modern physics Chinese Academy of Sciences Lanzhou 730000 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing 100871 China4. China Institute of Atomic Energy Beijing 102413 China

High-spin states in 161Er have been studied experimentally via the 150Nd(16O, 5n) reaction at a beam energy of 86 MeV. Three rotational bands built on the 5/2.[642., 3/2.[52.], and 11/2.[505] configurations have been extended up to high-spin states, and particularly, the α = -1/2.branch of the ground state 3/2.[52.] band has been revised significantly. It is found that signature inversion occurs in the 3/2.[52.] band after the band crossing in 161Er. The systematics of the signature inversion associated with the 3/2.[52.] configuration in the rare-earth region is discussed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and a triaxial deformation is proposed to the 3/2.[52.] band.

关键词： high-spin states signature inversion triaxial particle-rotor model

Investigation into the rotational bands of ^(185)Pt with the particle-rotor model

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 114-118页

作者： LI GuangShun1,2. ZHOU XiaoHong1,2. ZHANG ShuangQuan3, ZHANG YuHu1 & MENG Jie3 1 institute of Modern physics, {2. academy of Sciences, lanzhou 730000, china 2.Graduate University of {2. academy of Sciences, Beijing 100049, china 3 School of physics and SK Laboratory of Nuclear physics & Technology, Peking University, Beijing 100871, china 1. institute of Modern physics Chinese Academy of Sciences Lanzhou 730000 China 2. Graduate University of chinese academy of Sciences Beijing 100049 China 3. School of physics and SK Laboratory of Nuclear physics & Technology Peking University Beijing 100871 China

Theoretical calculations have been performed for the ν9/2.[62.](i13/2. and ν7/2.[503](f7/2. bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is pro posed to be dominated by the ν9/2.[62.](i13/2. component, while the negative-parity band shows strong mixing of ν7/2.[503](f7/2. and ν9/2.[505](h9/2. configurations.

关键词： High-spin states particle-rotor model signature splitting configuration mixing

Hydrocarboxylation of Styrene in Water-Soluble Catalyst System Pd(OAc)2.TPPTSH-HOAc-H2.

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分子催化 1997年第2期 2-3页

作者： XIE Baohan KOU Yuan * YINGYuanqi (State Key Laboratory for Oxo Synthesis and Selective Qxidation lanzhou institute of {2. physics The chinese academy of Sciences lanzhou 730000)

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关键词： Hydrocarboxylation Styrene Water soluble catalyst Palladium acetate

Investigation on the Performance of Supported Molybdenum Carbide for the Partial Oxidation of Methane

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Journal of Natural Gas Chemistry 2003年第1期12卷 23-30页

作者： Quanli Zhu, Jian Yang, Jiaxin Wang, Shengfu Ji, Hanqing WangState Key Laboratory for Oxo Synthesis and Selective Oxidation, lanzhou institute of {2. physics, chinese academy of Sciences, lanzhou 730000, china State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

The performance of supported and unsupported molybdenum carbide for thepartial oxidation of methane (POM) to syngas was investigated. An evaluation of the catalystsindicates that bulk molybdenum carbide has a higher methane conversion during the initial stage buta lower selectivity to CO and H_2.CO ratio in the products. The rapid deactivation of the catalystis also a significant problem. However, the supported molybdenum carbide catalyst shows a muchhigher methane conversion, increased selectivity and significantly improved catalytic stability. Thecharacterization by XRD and BET specific area measurements depict an improved dispersion ofmolybdenum carbide when using alumina as a carrier. The bulk or the supported molybdenum carbideexists in the β-MO_2. phase, while it is transformed into molybdenum dioxide postcatalysis which isan important cause of molybdenum carbide deactivation.

关键词： molybdenum carbide molybdenum oxide partial oxidation of methane syngas deactivation

Intramolecular aromatic-ring stacking interaction of ternary Zn(UTP)L^(2.) complexes

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chinese Science Bulletin 1997年第14期42卷 1172-1175页

作者： LE Xueyi, WU Fuhai, SONG Fenyun and Jl Liangnian1.Department of Chemistry, Zhongshan University, Guangzhou 5102.5, china State Key Laboratory for Oxo Synthesis and Selective Oxidation, lanzhou {2. of chemical physics, chinese academy of Sciences, lanzhou 730000, china 2. Department of Hygienics, Guangdong Pharmaceutical School, Guangzhou 5102.4, china Department of Chemistry Zhongshan University Guangzhou 510275 China

THE mechanism of the action of the classic platinum antitumor drugs can be interpreted accord-ing to their bidentate, bifunctional interaction with the DNA of the tumor cell, resulting in in-hibition of the DNA replication. Recently, it was found that a new class of compounds withthe general formula cis-[Pt（NH3）2./sub>（N-het）Cl]Cl（N-het is a heteroaromatic N-base like pyri-dine） show effective antitumor activities. However, two possible mechanisms of action

关键词： stacking interaction ternary complexes heteroaromatic N-bases UTP4- stability constants.

Multifield coupling model and its applications for pile foundation in permafrost

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Science china Earth Sciences 2005年第7期48卷 968-977页

作者： WU Yaping1,2. ZHU Yuanlin2. GUO Chunxiang1, SU Qiang1 & MA Wei2.1. School of Civil Engineering, lanzhou Jiaotong University, lanzhou 730070, {2. 2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research institute, chinese academy of Sciences, lanzhou 730000, {2. School of Civil Engineering Lanzhou Jiaotong University Lanzhou 730070 China State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

Importing the interface element which links the frozen soil base with concrete piles and considering the couplings of stress field, temperature field and moisture field, this paper es- tablishes the nonlinear visco-elastic plastic finite element model of pile-soil. For a practical bridge structure the stress field and displacement field of single pile in freezing process are calculated. This paper emphatically studies the process of the tangential frost heave stress field, freezing stress field and displacement field varying with time, and ulteriorly studies time variation process of single pile carrying capacity in freezing process.

关键词： permafrost pile foundation freezing process multifield coupling analysis model.

Near infrared lights emission of ^(40)Ar^(16+) impacting on metal surfaces

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Science china(physics,Mechanics & Astronomy) 2009年第7期52卷 1021-1026页

作者： ZHANG XiaoAn1,2. XIAO GuoQing2. YANG ZhiHu2. WANG Li1 & ZHAN WenLong2.1 Department of physics, Xianyang Normal University, Xianyang 712.00, china 2.{2. of Modern physics, chinese academy of Sciences, lanzhou 730000, china Department of physics Xianyang Normal University Xianyang 712000 China institute of Modern physics Chinese Academy of Sciences Lanzhou 730000 China

The highly charged ion 40Ar16+ with the velocity (kinetic energy EK=150 keV, velocity V=8.5×105 m/s) smaller than Bohr velocity (VBohr=2.9×106 m/s) was found to hove impacts on the surfaces of metals Ni, Mo, Au and Al, and the Ar atomic infrared light lines and X-rays spectra were simultaneously measured. The experimental results show that the highly charged ion that captures electrons is neutralized, and the multiply-excited hollow atom forms. The hollow atom cascade decay radiates lights from infrared to X-ray spectrum. The intensity of infrared lights shows that the metallic work functions play an important role in the neutralization process of highly charged ions during their interaction with metallic surfaces, which verifies the classical over-the-barrier model.

关键词： infrared light lines X-ray neutralization highly charged ions

Topological Structure of Vortex Solution in Jackiw-Pi Model

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Communications in Theoretical physics 2007年第7期48卷 143-146页

作者： LI Xi-Guo LIU Zi-Yu LI Yong-Qing GAO Yuan GUO Yan-Rui XIAO Guo-Qing1 institute of Modern physics,the {2. academy of Sciences,P.O.Box 31,lanzhou 730000,china2.Graduate School,the {2. academy of Sciences,Beijing 100049,china3 Center of Theoretical Nuclear physics,National Laboratory of Heavy Ion Collisions,lanzhou 730000,china institute of Modern physics the Chinese Academy of Sciences P.O. Box 31 Lanzhou 730000 China

By using φ-mapping method,we discuss the topological structure of the self-duality solution in Jackiw-Pimodel in terms of gauge potential *** set up relationship between Chern-Simons vortex solution andtopological number,which is determined by Hopf index and Brouwer *** also give the quantization of flux inthis ***,we study the angular momentum of the vortex,which can be expressed in terms of,the flux.

关键词： topological structure vortex Jackiw-Pi model

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 {12.,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