2000 Vol. 24, No. 6
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Abstract:
Monte Carlo simulations of extensive air shower at the “knee” region are carried out by use of four kinds interactive models according to the condition of Tibet Yangbajing ASγ hybrid experiment.The characters of shower for different interactive model...
Monte Carlo simulations of extensive air shower at the “knee” region are carried out by use of four kinds interactive models according to the condition of Tibet Yangbajing ASγ hybrid experiment.The characters of shower for different interactive model...
Abstract:
A lot of data has been accumulated with Tibet Ⅱand HD AS array operated successfully since October of 1995 and 1996,respectivley. The preliminary results of searching for steady TeV gamma ray emissions from Crab Nebula with these data were presented ...
A lot of data has been accumulated with Tibet Ⅱand HD AS array operated successfully since October of 1995 and 1996,respectivley. The preliminary results of searching for steady TeV gamma ray emissions from Crab Nebula with these data were presented ...
Abstract:
Using a recently developed Monte Carlo effective Hamiltonian method,we study the low energy physics of 1+1 dimensional quantum mechanical system V(x)=μ2x2+λx4(here μ2<0,λ>0),which is similar to Higgs potential in the standard model of unified electro...
Using a recently developed Monte Carlo effective Hamiltonian method,we study the low energy physics of 1+1 dimensional quantum mechanical system V(x)=μ2x2+λx4(here μ2<0,λ>0),which is similar to Higgs potential in the standard model of unified electro...
Abstract:
The Leznov-Saveliev algebraic analysis method and Drinfeld -Sokolov construction are applied to the supersymmetric case. In this approach, we obtained the solution of the osp(1｜4)Toda model on the base of the Lie super algebra osp(1｜4)and its highest...
The Leznov-Saveliev algebraic analysis method and Drinfeld -Sokolov construction are applied to the supersymmetric case. In this approach, we obtained the solution of the osp(1｜4)Toda model on the base of the Lie super algebra osp(1｜4)and its highest...
Abstract:
The coupling cluster method is improved to calculate μ0,μ2 of vacuum wave function in 2+1-D SU(2)lattice gauge theory.The calculated results of μ0,μ2 show better scaling behaviors than the results obtained by original method at weak coupling region.
The coupling cluster method is improved to calculate μ0,μ2 of vacuum wave function in 2+1-D SU(2)lattice gauge theory.The calculated results of μ0,μ2 show better scaling behaviors than the results obtained by original method at weak coupling region.
Abstract:
According to Dirac's idea of the space-like consistency conditions,we define the space-like wave functions through introducing the space-like factor,which is equivalent to Bethe-Salpeter wave function in physical content. The space-like form of Bethe...
According to Dirac's idea of the space-like consistency conditions,we define the space-like wave functions through introducing the space-like factor,which is equivalent to Bethe-Salpeter wave function in physical content. The space-like form of Bethe...
Abstract:
Based on perturbative expansion,the contributions to quantum Wilson loop from three-connection field Green functions and from the lowest-order graviton self-energy are calculated respectively.The results show there exists excitation with localized cu...
Based on perturbative expansion,the contributions to quantum Wilson loop from three-connection field Green functions and from the lowest-order graviton self-energy are calculated respectively.The results show there exists excitation with localized cu...
Abstract:
In the reaction of 33.4MeV/u 17N on a target 9Be,the measured neutron spectra at different angles exhibit a complex pattern and vary regularly as a function of the detected angle. The detected neutrons probably come from the three origins:nucleon-nuc...
In the reaction of 33.4MeV/u 17N on a target 9Be,the measured neutron spectra at different angles exhibit a complex pattern and vary regularly as a function of the detected angle. The detected neutrons probably come from the three origins:nucleon-nuc...
Abstract:
We study an additional effect of energy loss of the projectile nucleons in unclear Drell-Yan process. With consideration of EMC effect and the energy loss effect,we predict the DY radio on the parton evolution model.An better prediction is given.
We study an additional effect of energy loss of the projectile nucleons in unclear Drell-Yan process. With consideration of EMC effect and the energy loss effect,we predict the DY radio on the parton evolution model.An better prediction is given.
Two-Pion Interferometry at Small Relative Momentum in Relativistic Asymmetrical Heavy Ion Collisions
Abstract:
The effect of the absorption of pion mesons in relativistic asymmetrical heavy-ion collisions on pion-source parameter is studied with two-pion interferometry at small relative momentum. The relations between the source parameters are obtained when t...
The effect of the absorption of pion mesons in relativistic asymmetrical heavy-ion collisions on pion-source parameter is studied with two-pion interferometry at small relative momentum. The relations between the source parameters are obtained when t...
Abstract:
The features of thermodynamics and particle emission during the disassembly of 129Xe are investigated as functions of temperature and freeze-out density in the framework of the lattice gas model. The calculation shows different temperature dependence...
The features of thermodynamics and particle emission during the disassembly of 129Xe are investigated as functions of temperature and freeze-out density in the framework of the lattice gas model. The calculation shows different temperature dependence...
Abstract:
With in the frameworu of the three-dimensional Vlasov equation,the dynamical evolution of highly compressed nuclei with high thermal excitation energy has been discussed. The distributions of particles in the space are uniform, while in the momentum ...
With in the frameworu of the three-dimensional Vlasov equation,the dynamical evolution of highly compressed nuclei with high thermal excitation energy has been discussed. The distributions of particles in the space are uniform, while in the momentum ...
Abstract:
Transition energies, incremental alignments of angular momentum, dynamic moments of inertia of triaxial superdeformed bands in rare earth nuclei have been examined systematically. It is found that the incremental alignments are nearly constant and th...
Transition energies, incremental alignments of angular momentum, dynamic moments of inertia of triaxial superdeformed bands in rare earth nuclei have been examined systematically. It is found that the incremental alignments are nearly constant and th...
Abstract:
In studying the properties of nuclear higher-spin states, not only is the K-mixture needed to be taken into account, but also the Coriolis interaction (the cranking term) should be introduced. The cranking term breaks the time reversal symmetry, and ...
In studying the properties of nuclear higher-spin states, not only is the K-mixture needed to be taken into account, but also the Coriolis interaction (the cranking term) should be introduced. The cranking term breaks the time reversal symmetry, and ...
Abstract:
Large Hadron Collider operation will produce high radiation background, lead tungstatecrystal is selected as scintillator of the CMS electromagnetic calorimeter To reach the pricision requirement of the energy measurement, strict requirement of the r...
Large Hadron Collider operation will produce high radiation background, lead tungstatecrystal is selected as scintillator of the CMS electromagnetic calorimeter To reach the pricision requirement of the energy measurement, strict requirement of the r...
Abstract:
The nonlinear resonance, chaos and halo formation in space charge dominated beams have been studied. The results for the range of the nonlinear resonance versus space charge effects, and the space charge thresholds of halo formation excited by nonlin...
The nonlinear resonance, chaos and halo formation in space charge dominated beams have been studied. The results for the range of the nonlinear resonance versus space charge effects, and the space charge thresholds of halo formation excited by nonlin...
Abstract:
A variational method is presented for computations of both monopole mode and dipole mode rf quantities in metal disk-loaded waveguides. It allows for rounding of edge of a disk hole without any approximation in shape treatment. Good agreement has bee...
A variational method is presented for computations of both monopole mode and dipole mode rf quantities in metal disk-loaded waveguides. It allows for rounding of edge of a disk hole without any approximation in shape treatment. Good agreement has bee...
Abstract:
In order to calculate the electron trajectory of 200kV self-shielded electron accelerator, the electric field is calculated with a TRAJ program. In this program, following electron track mash points one by one, the electron beam trajectories are calc...
In order to calculate the electron trajectory of 200kV self-shielded electron accelerator, the electric field is calculated with a TRAJ program. In this program, following electron track mash points one by one, the electron beam trajectories are calc...
Abstract:
Self-calibration experiment of silicon photodiodes in the soft X-ray spectral region of synchrotron radiation (50—2000eV) is carried out. Because of elimination of “dead region” and adoption of very thin SiO2 layer as window of the silicon photodiode...
Self-calibration experiment of silicon photodiodes in the soft X-ray spectral region of synchrotron radiation (50—2000eV) is carried out. Because of elimination of “dead region” and adoption of very thin SiO2 layer as window of the silicon photodiode...
Abstract:
A systematic theory of the appropriate spin operators for the relativistic states is developed. This paper discusses it in particle case, i.e., the quantum mechanics problem. For a massive relativistic particle with arbitrary nonzero spin, the spin o...
A systematic theory of the appropriate spin operators for the relativistic states is developed. This paper discusses it in particle case, i.e., the quantum mechanics problem. For a massive relativistic particle with arbitrary nonzero spin, the spin o...
Abstract:
We apply the shell-model wave functions of 76Ge to calculate the nuclear matrix elements and the half-life of the 2νββ decay of 76Ge. Our result is comparable to the recent observed 2νββ decay half-life of 76Ge. Furthermore it provides the upper limi...
We apply the shell-model wave functions of 76Ge to calculate the nuclear matrix elements and the half-life of the 2νββ decay of 76Ge. Our result is comparable to the recent observed 2νββ decay half-life of 76Ge. Furthermore it provides the upper limi...
Abstract:
Absolute measurement of branching fractions of purely leptonic decay, semi-leptonic decay and φπ+ decay of the Ds meson at a c.m. energy of 4.03 GeV were completed from the BES experiment at the BEPC electron-positron collider. The method by using co...
Absolute measurement of branching fractions of purely leptonic decay, semi-leptonic decay and φπ+ decay of the Ds meson at a c.m. energy of 4.03 GeV were completed from the BES experiment at the BEPC electron-positron collider. The method by using co...
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