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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 012000, 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

The construction of infinite families of any k-tight optimal and singular k-tight optimal directed double loop networks

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Science china Mathematics 2007年第7期50卷 1055-1064页

作者： Bao-xing CHEN~(1+) Xie-bin CHEN~2 Ji-xiang MENG~3 Wen-jun XIAO~4 1 department of Computer Science,Zhangzhou teachers college,Zhangzhou 363000,china 2 department of Mathematics and Information Science,Zhangzhou teachers college,Zhangzhou 363000,china 3 college of Mathematics & System Science,Xinjiang University,Urumqi 830046,china 4 department of Computer Science,South china University of Technology,Guangzhou 510641,china 1. department of Computer Science Zhangzhou Teachers College Zhangzhou 363000 China 2. department of Mathematics and Information Science Zhangzhou Teachers College Zhangzhou 363000 China 3. college of Mathematics & System Science Xinjiang University Urumqi 830046 China 4. department of Computer Science South China University of Technology Guangzhou 510641 China

The double loop network(DLN)is a circulant digraph with n nodes and outdegree *** is an important topological structure of computer interconnection networks and has been widely used in the designing of local area networks and distributed *** the number n of nodes,how to construct a DLN which has minimum diameter?This problem has attracted great attention.A related and longtime unsolved problem is:for any given non-negative integer k,is there an infinite family of k-tight optimal DLN?In this paper,two main results are obtained:(1)for any k≥0,the infinite families of k-tight optimal DLN can be constructed,where the number n(k,e,c)of their nodes is a polynomial of degree 2 in e with integral coefficients containing a parameter c.(2)for any k≥0, an infinite family of singular k-tight optimal DLN can be constructed.

关键词： double loop network diameter k-tight optimal singular k-tight optimal 05C12 05C20 05C85

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.

Accurate studies on the full vibrational energy spectra and molecular dissociation energies for some electronic states of N_(2)molecule

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Science china(physics,Mechanics & Astronomy) 2005年第4期48卷 385-398页

作者： REN Weiyi1,2, SUN Weiguo1, HOU Shilin3 & FENG Hao4 1. Institute of physics, college of Chemical Engineering, Sichuan University, Chengdu 610065, china 2. Institute of Theoretical physics, Xihua Normal University, Nanchong 637002, china 3. department of physics, china Oceanography University, Qingdao 266003, china 4. college of physics, Sichuan University, Chengdu 610065, china 1. Institute of physics College of Chemical Engineering Sichuan University 610065 Chengdu China 2. Institute of Theoretical physics Xihua Normal University 637002 Nanchong China 3. department of physics China Oceanography University 266003 Qingdao China 4. college of physics Sichuan University 610065 Chengdu China

It is usually very difficult to directly obtain molecular dissociation energy De and all accurate high-lying vibrational energies for most diatomic electronic states using modern experimental techniques or quantum theories, and it is also very difficult to give accurate analytical expression for diatomic molecular dissociation energy. This study proposes a new analytical formula for obtaining accurate molecular dissociation energy based on the LeRoy and Bernstein’s energy expression in dissociation limit. A set of full vibrational energy spectra for some electronic states of N2 molecule are studied using the algebraic method (AM) suggested recently, and the corresponding accurate molecular dissociation energies are evaluated using the proposed new formula and high-lying AM vibrational energies. The results show that the AM spectra and the new theoretical dissociation energies agree excellently with experimental data, and thereby providing a new physical approach to generating accurate dissociation energies for electronic states of diatomic molecules.

关键词： vibrational energy, dissociation energy, nitrogen molecule, algebraic method.

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