1992 Vol. 16, No. 7
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Abstract:
A method for the measurement of the vacuum decay rate λ0 of orthopositronium is suggested and the preliminary result is obtained λ0=7.034±0.013μs-1.The possibility for the improvement of the experiment has been discussed.
A method for the measurement of the vacuum decay rate λ0 of orthopositronium is suggested and the preliminary result is obtained λ0=7.034±0.013μs-1.The possibility for the improvement of the experiment has been discussed.
Abstract:
Calculation has been made when we adjust 4W1B beam line in Beijing Synchrotron Radiation Facility.The relation among the intensity,energg dispersion,energy accuracy of the monochromatic beam and all adjustable freedoms is acquired.The reasonable proc...
Calculation has been made when we adjust 4W1B beam line in Beijing Synchrotron Radiation Facility.The relation among the intensity,energg dispersion,energy accuracy of the monochromatic beam and all adjustable freedoms is acquired.The reasonable proc...
Abstract:
We study the phase transition in Z(N) Pots spin model by an analytical approach—the generalized cumulant expansion with mean field approximation.As a test,we perform the expansion to the third order correction for Z(3),Z(4),Z(5) and Z(60 cases.The cr...
We study the phase transition in Z(N) Pots spin model by an analytical approach—the generalized cumulant expansion with mean field approximation.As a test,we perform the expansion to the third order correction for Z(3),Z(4),Z(5) and Z(60 cases.The cr...
Abstract:
For a gauge theory of self-dual fields,whose S-matrix element manifestly including the self-duality constraint is obtained by using the path integral light-cone quantization.
For a gauge theory of self-dual fields,whose S-matrix element manifestly including the self-duality constraint is obtained by using the path integral light-cone quantization.
Abstract:
In this paper.based on the FL-non-topological soliton model,we discussed the possibility of the formation of the FL-soliton star and its behavior at high temperature.We find that the stable,cold and spherical FL-soliton star can be formed,under the n...
In this paper.based on the FL-non-topological soliton model,we discussed the possibility of the formation of the FL-soliton star and its behavior at high temperature.We find that the stable,cold and spherical FL-soliton star can be formed,under the n...
Abstract:
Using the free field representation,we calculate,the r-matrix and classical exchange algebra for WZNW model under periodic boundary condition,and discuss the quantum counterparts of the exchange algebra as well as the performances of the r-matrix and...
Using the free field representation,we calculate,the r-matrix and classical exchange algebra for WZNW model under periodic boundary condition,and discuss the quantum counterparts of the exchange algebra as well as the performances of the r-matrix and...
Abstract:
The saturating chiral breaking field theory are used to study the compressibility of the Fermi-liquid and the excitation energies of the giant monopole and quadrupole states in the framework of mean-field theory.It is found that the compressibility o...
The saturating chiral breaking field theory are used to study the compressibility of the Fermi-liquid and the excitation energies of the giant monopole and quadrupole states in the framework of mean-field theory.It is found that the compressibility o...
Abstract:
Based on Drell-Yan Mechanism modified by pertubative QCD and taking account of the contribution of vector meson states,we analyzed and explained the data of the WA-78 group ni (π-,P)+A→μμ+X process at 2mμμμ<1.5GeV and 0.1F<0.6 with the use of the res...
Based on Drell-Yan Mechanism modified by pertubative QCD and taking account of the contribution of vector meson states,we analyzed and explained the data of the WA-78 group ni (π-,P)+A→μμ+X process at 2mμμμ<1.5GeV and 0.1F<0.6 with the use of the res...
Abstract:
Fluctuations of the produced particles of the final states in high energy collisions may be the break through for investigating multi-particle dynamics.How to eliminate the statistical noise of the system is one of the most important problems.In this...
Fluctuations of the produced particles of the final states in high energy collisions may be the break through for investigating multi-particle dynamics.How to eliminate the statistical noise of the system is one of the most important problems.In this...
Abstract:
The complete fusion excitation function for the 16O+28Si reaction is measured in the range of 50—90MeV with step of 1.0MeV.It is analysed by using some theoretical models and the model parameters are extracted from this analysis.Gross structure is fo...
The complete fusion excitation function for the 16O+28Si reaction is measured in the range of 50—90MeV with step of 1.0MeV.It is analysed by using some theoretical models and the model parameters are extracted from this analysis.Gross structure is fo...
Abstract:
The proton-rich isotope 65As was observed preliminarily by 20.11A MeV 64Zn beam bombardment on a 17.2mg/cm2 Be target.The detecting system comprising a magnetic facility RIPS,a PPAC,an ionization chamber,and a PSSD was used to identify the charge sta...
The proton-rich isotope 65As was observed preliminarily by 20.11A MeV 64Zn beam bombardment on a 17.2mg/cm2 Be target.The detecting system comprising a magnetic facility RIPS,a PPAC,an ionization chamber,and a PSSD was used to identify the charge sta...
Abstract:
A symmetry ternary fission (STF) shape with a spherical residue plus 3 rose-leaf-like rotating bodies (SRRL) has been proposed to describe the large deformation process from sphere to scission point with one deformation paramenter.By LDM,the relative...
A symmetry ternary fission (STF) shape with a spherical residue plus 3 rose-leaf-like rotating bodies (SRRL) has been proposed to describe the large deformation process from sphere to scission point with one deformation paramenter.By LDM,the relative...
Abstract:
The dynamical process of heavy ion collisions in the energy region of 10 to 100MeV/A has been investigated by Quantum Molecular Dynamics model.According to the calculated mass distribution of clusters,the time evolution of mass distribution and densi...
The dynamical process of heavy ion collisions in the energy region of 10 to 100MeV/A has been investigated by Quantum Molecular Dynamics model.According to the calculated mass distribution of clusters,the time evolution of mass distribution and densi...
Abstract:
With Hartree-Fock approximation,the relation between excitation energy and temperature has been obtained and discussed for both infinite nuclear matter and finite nucleus Pb208.
With Hartree-Fock approximation,the relation between excitation energy and temperature has been obtained and discussed for both infinite nuclear matter and finite nucleus Pb208.
Abstract:
By analysing specific examples,it is shown that the Schwarzchild solution and the Booth's solution are a genus of solutions in space-time of arbitrary spatial dimension.
By analysing specific examples,it is shown that the Schwarzchild solution and the Booth's solution are a genus of solutions in space-time of arbitrary spatial dimension.
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