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The study of energy bands in nucleus ^(102)Zr

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Science china(physics,Mechanics & Astronomy) 2010年第1期53卷 106-110页

作者： DONG GuoXiang 1,2 , YU ShaoYing 1,2,3 , LIU YanXin 1 , SHEN CaiWan 1,2,4 & DONG YongSheng 1,2,5I School of Science, Huzhou teachers college, Huzhou 313000, china 2 School of Science and Information Engineering, Zhejiang Normal University, Jinhua 321000, china 3 Institute of Theoretical physics, Chinese Academy of Sciences, Beijing 100080, china 4 Center of Theoretical Nuclear physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, china 5 department of physics, jining teachers college, jining 012.00, china 1. School of Science Huzhou Teachers College Huzhou 313000 China2. School of Science and Information Engineering Zhejiang Normal University Jinhua 321000 China3. Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China4. Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China5. Department of Physics Jining Teachers College Jining 012000 China

Theoretical calculations of the energy bands in nucleus 102 Zr are carried out by taking the projected shell model approach, which has reproduced the experimental data. In addition, by analyzing band-head energies, corresponding configurations of yrast band, quasi-particle rotational bands and side bands, we have worked out the microscopic formation mechanism of axially symmetric deformation bands: The low-excitation deformation bands are attributed to the high-j intruder states 1g 7/2 and 1h 11/2 in the N=4, 5 shells; the quasi-particles in the orbit v5/2-[532], v3/2+[411] and v3/2+[413] in particular play an important role in the deformation of 102 Zr.

关键词： projected shell model yrast band quasi-particle rotational band side band

INTERPLAY BETWEEN FRENKEL EXCITONS AND PHOTONS

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厦门大学学报（自然科学版） 1993年第S2期32卷 109-114页

作者： Li Baoxing(physics department, Hangzhou teachers’ college 310012) 杭州师范学院浙江杭州

We investigate the effect of photons and phonons on Frenkel exciton spectrum. The Hamilto nian for a coupled system of the Frenkel excitons. the photons and the phonons is derived. The phonon-exciton interaction makes the energy band of the Frenkel excitons narrow. The photons and the Frenkel excitons make up Frenkel exciton polaritons which are quasi-particles. The Frenkel exciton polariton spectrum consists of two branches. It is found that the photon-exciton interaction makes the ground energy of the Frenkel excitons increase.

关键词： exciton Frenkel phonon branches Hamiltonian photon narrow quasi operators insulating

Studies on the Relation between the Composition of Thermal Sensitive MnZn Ferrite and Curie Temperature

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Journal of Materials Science & Technology 2000年第2期16卷 209-210页

作者： Mengkui WANG (department of physics, Jinzhou teachers college, Jinzhou 121003, china) Junyue WANG (Jinzhou Audio-Visual Education Center, Jinzhou 121000, china) Ke SUN (department of physics, Northeastern University, Shenyang 110006, china) department of physics Jinzhou Teachers College Jinzhou 121003 China Jinzhou Audio-Visual Education Center Jinzhou 121000 China department of physics Northeastern University Shenyang 110006 China

Thermal sensitive MnZn ferrite is a kind of soft magnetic ferrite material with lower Curie temperature (Tc) and can be used to make many kinds of magnetic thermal sensitive sensors with high sensitivity. In this paper, the relation between the composition of thermal sensitive ferrite and TC was studied. It was found that TC changes linearly with ZnO extent when the content of Fe2O3 is fixed. Based on lots of experiments, an experimential formula to determine was given out.

关键词： Studies on the Relation between the Composition of Thermal Sensitive MnZn Ferrite and Curie Temperature ZnO

Alpha-Chain States in 4N-Nuclei

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Chinese journal of nuclear physics 1997年第2期19卷 99-102页

作者： Xie Wenfang Chen Chuanyu department of physics,Guangzhou teachers’ college,Guangzhou 510400 广州师范学院物理系广东广州 510400 广州师范学院物理系广东广州

Alpha-chain states in 4N-nuclei are studied via an analysis of underlying quantummechanical *** candidates for linear chain states in N alpha particles arepointed out.

关键词： Alpha-chain states 4N-nuclei Quantum mechanical symmetry

BGP reflection functors in root categories

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Science china Mathematics 2005年第8期48卷 1033-1045页

作者： XIAO Jie, ZHANG Guanglian1’2 & ZHU Bin department of Mathematical Sciences, Tsinghua University, Beijing 100084, china department of Mathematics, Yancheng teachers college, Yancheng 224002, china 1. department of Mathematical Sciences Tsinghua University 100084 Beijing China 2. department of Mathematics Yancheng Teachers College 224002 Yancheng China

We define the BGP-reflection functors in the derived categories and the root categories. By Ringel's Hall algebra approach, the BGP-reflection functor is applicable to obtain the classical Weyl group action on the Lie... 详细信息

关键词： m-cycle complexes, derived categories, BGP-reflections, Kac-Moody algebras.

From the Green's Function in Tight-Binding Representation to Interatomic Many-body Potentials

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Journal of Materials Science & Technology 1999年第4期15卷 315-319页

作者： Shaojun LIU(department of physics, Beijing Normal University, Beijing 100875, china)Xiaobo WEI(department of physics, Liuzhou college of Education, Liuzhou 545005, china)Zhaodou CHEN Jun CAI and Benkun MA(department of physics, Beijing Normal University, Beijing Normal Univ Dept Phys Beijing 100875 Peoples R China Liuzhou Coll Educ Dept Phys Liuzhou 545005 Peoples R China

In this paper, we deduce the analytical form of many-body interatomic potentials based on the Green's function in tight-binding representation. The many-body potentials are expressed as the functions of the hopping integrals which are the physical origin of cohesion of atoms. For thesimple case of s-valent system, the inversion of the many-body potentials are discussed in detail by using the lattice inversion method.

关键词： Rev Li Chen From the Green’s Function in Tight-Binding Representation to Interatomic Many-body Potentials body

Asymptotic Convergence to Steady-State Solutions for Solutions of the Initial Boundary Problem to a Simplified Hydrodynamic Model for Semiconductor

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Wuhan University Journal of Natural Sciences 2000年第3期5卷 265-270页

作者： Ying Gu\|liang department of Mathematics, Xianning teachers’ college, Xia nning 437005,china Xianning teachers' college Department of Mathematics Xianning China

We studied the asymptotic behavior of solutions to the initial boundary value problem on the spatial interval [0,1] for a one-dimensional simplified gydrodynamic model for semiconductors wheng(t)→b *, and proved the unique global existence of smooth solutions to the initial boundary problem. We also show that the solutions converge to the corresponding steady-state solutions time-asymptotically by introducing the suitable shift functions.

关键词： semiconductor hydrodynamic model asymptotic convergence

On quasi-convex mappings of order α in the unit ball of a complex Banach space

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Science china Mathematics 2006年第11期49卷 1451-1457页

作者： LIU Taishun & XU Qinghua department of Mathematics, Huzhou teachers college, Huzhou, 313000, china department of Mathematics, Jiangxi Normal University, Nanchang, 330022, china department of Mathematics Huzhou Teachers College Huzhou 313000 China department of Mathematics Jiangxi Normal University Nanchang 330022 China

In this paper, a class of biholomorphic mappings named quasi-convex mapping of order a in the unit ball of a complex Banach space is introduced. When the Banach space is confined to Cn, we obtain the relation between this class of mappings and the convex mappings. Furthermore, the growth and covering theorems of this class of mappings are given on the unit ball of a complex Banach space X. Finally, we get the second order terms coefficient estimations of the homogeneous expansion of quasi-convex mapping of order a defined on the polydisc in Cn and on the unit ball in a complex Banach space, respectively.

关键词： coefficient estimation the homogeneous expansion quasi-convex mapping quasi-convex mapping of order a.

Lattice dynamical simulation of methane hydrate

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Journal of Natural Gas Chemistry 2010年第1期19卷 43-46页

作者： Lin Wang, Shunle Dong physics department, college of Information Science and Engineering, Ocean University of china, Qingdao 266100, Shandong, china [a] physics department College of Information Science and Engineering Ocean University of China Qingdao 266100 Shandong China

INS （Inelastic Neutron Scattering） spectrum of methane hydrate was measured on MARI （a direct-geometry chopper spectrometer） at Ruther-ford Appleton Laboratory, UK. Compared with ice Ih, it is found that the whole spectrum of methane hydrate moves toward high-energy by about 1.5 meV. Using lattice dynamical （LD） technique, computer simulations of methane hydrate were carried out. In the simulations, four potential models （BE TIP3P, TIP4P, MCY） were employed to calculate the phonon density of states （PDOS）. Comparing the calculated PDOS spectrum with the experimental spectrum, it is found that BF, TIP4P, and TIP3P potential lattices give out well-separated translational and librational bands while MCY potential lattice is unstable to do so and this model is not suitable to describe hydrate system.

关键词： methane hydrate inelastic neutron scattering lattice dynamical simulation