检索结果-南通市图书馆

Inherent Nodal Structures in Doubly-Excited Intrashell States of Atoms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第3期16卷 178-180页

作者： bao cheng-guang Department of Physics Zhongshan UniversityGuangzhou 510275

Quantum mechanical systems are strongly constrained by ***,inherent nodal surfaces are imposed on the wave *** this paper,the inherent nodal surfaces existing in the doubly-excited intrashell states of atoms have been... 详细信息

关键词： functions. surfaces states

Bose-Einstein Condensation in a Two-Dimensional System with Sixty Bosons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第2期17卷 123-125页

作者： bao cheng-guang Department of Physics Zhongshan UniversityGuangzhou 510275

A 60-boson system confined on a sphere has been qualitatively studied based on symmetry considerations. The low-lying spectrum is dominated by the ground rotation band based on the fullerene structure. In this band all the L=1 to L=5 states are found to be prohibited by symmetry. Therefore, there is a large gap lying between the ground state and the first excited state. The magnitude of this gap, which is associated with the critical temperature of Bose-Einstein condensation, has been evaluated. It is found that, the smaller the radius of the sphere of confinement, the higher the critical temperature.

关键词： temperature structure state.

Background of Existence of the Two Low-Lying Adjacent 4^(+) Narrow Resonances in ^(16)O Nucleus and Other 4-Boson Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第5期18卷 638-640页

作者： bao cheng-guang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275

Based on an analysis of the inherent nodal structures of wave functions of 4-boson systems,we found that the internal energy of the 4_(1)^(+) state should be lower because its structure can be optimized without suffering a strong constraint arising from symmetry(while other 1≤L≤3 states suffer from this kind of constraints).Furthermore,two superior structures favorable in binding are found to be allowed to be possessed by 4^(+) *** findings would lead to the appearance of two adjacent 4^(+) states,as a common feature,in the low-lying spectra of 4 boson systems.

关键词： allowed Existence symmetry

Analysis of the Low-Lying Spectra of Five-Nucleon Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第7期17卷 485-487页

作者： bao cheng-guang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275(mailing address)

The wavefunctions are decomposed into components. The inherent nodal structure and the stability of these components are investigated. It is assumed that the low-lying states would be dominated by the components without inherent nodal surfaces. Based on this assumption, the composition of the wave functions of the low-lying states of 5He has been suggested and the qualitative feature of the spectrum has been explained.

关键词： nodal assumed qualitative

Inherent Nodal Structures of the Wavefunctions of a 4-Boson System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第1期14卷 20-23页

作者： bao cheng-guang Department of Physics Zhongshan UniversityGuangzhou 510275

The effect of a kind of nodal surfaces originated from the inherent symmetry on a 4-boson system has been *** was found that these surfaces determine the accessibility of specific geometric structures.

关键词： surfaces symmetry system

Alpha-Chain Structure of ^(12)C

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1996年第7期13卷 516-519页

作者： XIE Wen-fang bao cheng-guang Department of Physics Guangdong University of TechnologyGuangzhou 510090 CCAST(World Laboratory)P.O.Box 8730Beijing 100080 Department of Physics Zhongshan UniversityGuangzhou 510275

Alpha-chain states in ^(12)C are studied via an analysis of underlying quantum mechanical *** is pointed out that the linear chain band exists undoubting in ^(12)***,the pure linear chain structure does not exist in ^... 详细信息

关键词： symmetry triangle

Existence of Two Higher L=0 Bound States of the Dipositroniums

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第4期16卷 267-268页

作者： bao cheng-guang SHI Ting-yun Center of Theoretical Nuclear Physics National Laboratory of Heavy IonLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275

Symmetry has imposed very strong constraints on the internal structure of quantum mechanical *** particular,whether a state can access a given outgoing channel is constrained by *** the dipositroniums,the most important channel is the Ps-Ps ***,based on symmetry consideration it was found that only a few excited states are allowed to access the Ps-Ps channel,thereby at least the existence of two higher L=0 bound states(higher than the Ps-Ps threshold)has been affirmed.

关键词： positronium states allowed

An Analysis of the Symmetry in ABA Coulomb Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第7期15卷 492-494页

作者： SHI Ting-yun bao cheng-guang Department of Physics Zhongshan UniversityGuangzhou 510275

The nodal structures of quantum states of three-body ABA systems composed of two identical fermions and another one with an opposite charge are *** expand the wavefunction in the body frame and show that the effect of symmetry such as rotation,space inversion,and permutation is to impose nodal surfaces on the components of the *** on the nodal surface,a classification of quantum states of ABA systems is *** is found that the quantum symmetry plays a crucial role in determing the energy levels and structures of the low-lying states.

关键词： quantum symmetry nodal

Qualitative Analysis of Low-Lying Resonances of the Dipositronium Emerging from Ps-Ps and Ps-Ps* Collisions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第5期17卷 346-348页

作者： bao cheng-guang SHI Ting-Yun Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275 Wuhan Institute of Physics and Mathematics Chinese Academy of SciencesWuhan 430071

An analysis of channel wave functions is made to clarify the types of resonance emerging from the Ps-Ps and Ps-Ps* *** ordering of the energy levels of the states of the dipositronium is evaluated based on the inherent nodal structures of wave functions and on the existing theoretical *** existence of a few very probable low-lying narrower resonances,namely the 0^(+)_(1)(A_(2)),1^(-)_(1)(E),…,benefiting from the centrifugal barrier has been suggested.

关键词： positronium wave narrow