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Electron-Hole Interaction in Conjugated Polymers

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Chinese physics Letters 1995年第1期12卷 38-41页

作者： WU Changqin t.4.lee physics laboratory and department of physics fudan universityshanghai 200433

the electron-hole interaction in conjugated polymers is considered for both a short chain and an infinite-long *** attraction and repulsion between the electron and hole for different interactions are *** states shoul... 详细信息

关键词： attractive Electron infinite

Width of Soliton and the Electron Correlation in Polymer

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Chinese physics Letters 1996年第3期13卷 211-214页

作者： MA Yun-sheng WU Chang-qin FU Rou-li SUN Xin t.4.lee laboratory and department of physics fudan universityshanghai 200433 national laboratory of infrared physics chinese academy of sciencesshanghai 200083

the effect of electron correlation on the width of the soliton in polymer is *** theory shows that the screening plays a key role in the effect of electron correlation on the width of soliton:In weak screenings the width of soliton is reduced by the electron-electron interaction;whereas,,in strong screenings it will be *** physical reason is given at the end.

关键词： soliton Electron Soliton

Single Electron Capture for Ce^(+)and Ho^(+)in H_(2)

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Chinese physics Letters 1995年第1期12卷 16-18页

作者： WU Weimin GU Jian WU Songmao LU Fuquan YANG Fujia t.4.lee physics laboratory&nuclear science department fudan university shanghai 200433 forward corp.fellow

the single-electron capture cross sections for the impact of rare-earth ions Ce^(+),Ho^(+)on H_(2)are measured in the energy range 3-8keV by'growth rate'*** measurement also reveals that the incident ions are predomin... 详细信息

关键词： method. state. Electron

Absolute Cross Sections for Single Ionization of Ar^(+) and Cl^(+) by Electron Impact

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Chinese physics Letters 1994年第2期11卷 73-75页

作者： SHI Wei FANG Dufei LU Fuquan GAO Haibin GU Jian WU Songmao WU Weiming tANG Jiayong YANG Fujia t.D.lee physics laboratory and department of nuclear science Fudan UniversityShanghai 200433

A crossed-beam facility for electron impact ionization of ions was *** absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were *** uncertainty is abou... 详细信息

关键词： absolute Electron ionization

Effects of Off-Diagonal Electron-Electron Interactions on Exciton Energies in C_(60)

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Chinese physics Letters 1996年第11期13卷 863-866页

作者： RAO Xue-song ZHAO Hua FU Rou-li SUN Xin KNASU t.4.lee laboratory and department of physics fudan universityshanghai 200433 and national laboratory of infrared physicschinese academy of sciencesshanghai200083 national laboratory for high energy physics tsukubaibaraki 305japan

Since the neighboringπorbits in C_(60) are well overlapped,the off-diagonal part of electron interaction plays an important *** this paper,the effects of the off-diagonal electron interactions on the exciton energies in C_(60) are studied by using the single configuration interaction *** is found that the binding energies of the low-lying singlet and triplet excitons depend sensitively upon the off-diagonal interactions which compete against the diagonal interactions and suppress the binding of the *** implication of these features is discussed.

关键词： diagonal Electron interaction

Diffusion of Silver in Nanometer Ni-B Amorphous Alloy

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Chinese physics Letters 1994年第9期11卷 577-580页

作者： LI Xiangyang CHENG Huansheng HE Wenquan YANG Fujia t.D.lee physics laboratory Fudan UniversityShanghai 200433 department of nuclear science Fudan UniversityShanghai 200433

Diffusion of Ag in nanometer Ni-B amorphous alloy,has been studied by heavy-ion Rutherford backscattering *** values of the diffusion coefficient which were found at 293,323 and 373K,are 3.5×10^(-16),4.3 ×10^(-15) and 5.0×10^(-14) cm^(2)/s,***,small values for the activation energy,0.58 eV,and the pre-exponential factor of the diffusion coefficient,3.9×10^(-16) cm^(2)/s,were derived from Arrhenius ***,a possible free volume controlled diffusion mechanism was discussed.

关键词： spectroscopy alloy Diffusion

Single Electron Capture for Impact of Proton on H_(2)

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Chinese physics Letters 1994年第8期11卷 484-487页

作者： WU Weimin GU Jian WU Songmao LU Fuquan YANG Fujia t.4.lee laboratory&department of nuclear science fudan universityshanghai 200433

the cross sections of electron capture for 3-10 keV proton traversing H_(2) were measured by using the‘growth rate’*** experimental procedure is *** experimental results are in good agreement with the recommended data.

关键词： method Electron keV

Damage Production and Annealing During MeV He Ion RBS/Channeling Analysis of GaP

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Chinese physics Letters 1994年第4期11卷 219-222页

作者： LI Xiangyang CHENG Huansheng YANG Fujia t.D.lee physics laboratory Fudan UniversityShanghai 200433 Mailing address:department of nuclear science Fudan UniversityShanghai 200433

the creation of defects in GaP bombarded with MeV 4He ions has been studied under ultra-high-vacuum condition by Rutherford backscattering/channeling(RBS/C)*** experimental results suggest that the defect generation rate is strongly related to the surface *** the GaP is covered with a thin amorphous layer,a significant ion beam annealing effect Will be *** present results show that for GaP the damage is produced mainly by nuclear collision.

关键词： GaP vacuum collision

A Lattice Boltzmann Boundary Condition at Impermeable Boundaries

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Chinese physics Letters 1997年第12期14卷 912-915页

作者： FANG Hai-ping LIN Zhi-fang tAO Rui-bao t.D.lee physics laboratory and department of physics fudan universityshanghai 200433

A hydrodynamic boundary condition for the lattice Boltzmann model at impermeable boundaries is *** boundary condition satisfies both the no-slip condition and the fluid conservation at boundary *** flow and Couette fl... 详细信息

关键词： boundary flow satis