2005 Vol. 29, No. 5
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Abstract:
RIKEN has produced the new element Z=113 by cold-fusion reaction. Here we systematically study the new nuclide 278113 and its α-Decay chain using deformed relativistic mean-field theory with three sets of force parameters,TMA,NL-Z2 and NL3.The result...
RIKEN has produced the new element Z=113 by cold-fusion reaction. Here we systematically study the new nuclide 278113 and its α-Decay chain using deformed relativistic mean-field theory with three sets of force parameters,TMA,NL-Z2 and NL3.The result...
Abstract:
The coupling Schrodinger equations describing the evolution of c`c states in nuclear matter are analytically and systematically solved via perturbation method,and the correlation between charmonium formation and nuclear absorption is investigated. Af...
The coupling Schrodinger equations describing the evolution of c`c states in nuclear matter are analytically and systematically solved via perturbation method,and the correlation between charmonium formation and nuclear absorption is investigated. Af...
Abstract:
Using the improved lattice gauge field Hamiltonian and the truncated eigenvalue equation method, we compute the 0++ glueball wave function of three-dimensional U(1) lattice gauge theory up to the 3rd order. The scaling behavior of the 3rd order resul...
Using the improved lattice gauge field Hamiltonian and the truncated eigenvalue equation method, we compute the 0++ glueball wave function of three-dimensional U(1) lattice gauge theory up to the 3rd order. The scaling behavior of the 3rd order resul...
Abstract:
The experimental set-up, methods and results on the synthesis and identification of the new isotope 265 107Bh are presented in this paper. The new isotope was produced by the complete fusion-evaporation reaction of 243Am with 168MeV 26Mg at the Secto...
The experimental set-up, methods and results on the synthesis and identification of the new isotope 265 107Bh are presented in this paper. The new isotope was produced by the complete fusion-evaporation reaction of 243Am with 168MeV 26Mg at the Secto...
Abstract:
We insert the isospin degree of freedom into the momentum dependent interaction to obtain an isospin and momentum dependent interaction given in a form practically usable in isospin dependent quantum molecular dynamics model. We investigate the isosp...
We insert the isospin degree of freedom into the momentum dependent interaction to obtain an isospin and momentum dependent interaction given in a form practically usable in isospin dependent quantum molecular dynamics model. We investigate the isosp...
Abstract:
The overlapping cylinder model (OCM) is used in this letter to describe the rapidity (or pseudorapidity) distributions of charged particles produced in nucleus-nucleus collisions at high energies. For the fixed target experiments at present accelerat...
The overlapping cylinder model (OCM) is used in this letter to describe the rapidity (or pseudorapidity) distributions of charged particles produced in nucleus-nucleus collisions at high energies. For the fixed target experiments at present accelerat...
Abstract:
We examine the two-pion Hanbury-Brown-Twiss (HBT) interferometry for the expanding sources of quark-gluon plasma evolution with the Bjorken cylinder geometry.The two-pion HBT correlation functions are calculated using quantum probability amplitudes i...
We examine the two-pion Hanbury-Brown-Twiss (HBT) interferometry for the expanding sources of quark-gluon plasma evolution with the Bjorken cylinder geometry.The two-pion HBT correlation functions are calculated using quantum probability amplitudes i...
Abstract:
The statistical property is studied for the resonance matter produced in relativistic heavy-ion collision. The relation between chemical potential of the resonant particle and net particle density is discussed. The total particle density and the ener...
The statistical property is studied for the resonance matter produced in relativistic heavy-ion collision. The relation between chemical potential of the resonant particle and net particle density is discussed. The total particle density and the ener...
Abstract:
Design of cell structure and layer arrangement of the BESⅢ drift chamber are presented. The effect of stereo angles and the layers at axial-stereo boundaries on the drift-time-to-distance relation are discussed. In addition, the optimization of layer...
Design of cell structure and layer arrangement of the BESⅢ drift chamber are presented. The effect of stereo angles and the layers at axial-stereo boundaries on the drift-time-to-distance relation are discussed. In addition, the optimization of layer...
Abstract:
Using a proportional tube, the gas gain of the helium-based gas mixture He/C3H8(60/40) was measured with 55Fe 5.9keV X-ray source as a function of the anode wire high voltage, gas temperature, gas pressure and gas mixture ratio. The gas mixtures of H...
Using a proportional tube, the gas gain of the helium-based gas mixture He/C3H8(60/40) was measured with 55Fe 5.9keV X-ray source as a function of the anode wire high voltage, gas temperature, gas pressure and gas mixture ratio. The gas mixtures of H...
Abstract:
The lateral distributions, as measured by ARGO array, of the extensive air showers induced by γ and hadrons with energy range from 100GeV to 10 TeV, zenith angle from 0° to 45°, were studied using Monte Carlo generated data. Several parameters such a...
The lateral distributions, as measured by ARGO array, of the extensive air showers induced by γ and hadrons with energy range from 100GeV to 10 TeV, zenith angle from 0° to 45°, were studied using Monte Carlo generated data. Several parameters such a...
Abstract:
The measurement method and principle of dipole magnet reproducibility for Cooling-storage-ring are introduced. How the position and number of steel sheet affect the reproducibility of magnet is investigated. In the end, the reproducibility of CSRm di...
The measurement method and principle of dipole magnet reproducibility for Cooling-storage-ring are introduced. How the position and number of steel sheet affect the reproducibility of magnet is investigated. In the end, the reproducibility of CSRm di...
Abstract:
The TESLA positron injector linac with an L-band TW normal conducting structure has been studied, which offers both higher shunt impedance and larger aperture. Main parameters of this injector linac have been designed by systematical beam modeling, a...
The TESLA positron injector linac with an L-band TW normal conducting structure has been studied, which offers both higher shunt impedance and larger aperture. Main parameters of this injector linac have been designed by systematical beam modeling, a...
Abstract:
Plasma could be produced when intense electron beams striking on converter target materials, such as Ta. The beam space charge may draw an ion current out of the plasma, which could substantially affect the final focus of beam on the target. This is ...
Plasma could be produced when intense electron beams striking on converter target materials, such as Ta. The beam space charge may draw an ion current out of the plasma, which could substantially affect the final focus of beam on the target. This is ...
Abstract:
E5-4 experimental electron gun system is the improved version of BEPC gun system. Firstly,some theoretical analyses on E5-4 gun are performed.Beam testing result is then introduced. The test is based on Y796 cathode-grid assembly, new power supply sy...
E5-4 experimental electron gun system is the improved version of BEPC gun system. Firstly,some theoretical analyses on E5-4 gun are performed.Beam testing result is then introduced. The test is based on Y796 cathode-grid assembly, new power supply sy...
Abstract:
A 4-rod RFQ cavity was simulated with MAFIA code for the design of a high current, high duty factor RFQ accelerator. The influence of distance, wide, height and shape of stems on the cavity's RF property were studied. The structure parameters of the ...
A 4-rod RFQ cavity was simulated with MAFIA code for the design of a high current, high duty factor RFQ accelerator. The influence of distance, wide, height and shape of stems on the cavity's RF property were studied. The structure parameters of the ...
Abstract:
Measurement of electron bunch length through its generated coherent diffraction radiation (CDR) via optical autocorrelation is a new non-intercepting frequency domain diagnostics technique developed in accelerator fields recently. In this paper, the ...
Measurement of electron bunch length through its generated coherent diffraction radiation (CDR) via optical autocorrelation is a new non-intercepting frequency domain diagnostics technique developed in accelerator fields recently. In this paper, the ...
Abstract:
The effects of hydrogen plasma treatment on He-implantation-induced cavities in silicon during subsequent annealing were studied.Silicon samples were first implanted at room temperature with He ions of different energies (40,160 and 1550keV) at the s...
The effects of hydrogen plasma treatment on He-implantation-induced cavities in silicon during subsequent annealing were studied.Silicon samples were first implanted at room temperature with He ions of different energies (40,160 and 1550keV) at the s...
Abstract:
This paper derived the formulation of the real efficient emission coefficient secondary electron under the condition that high energy primary electron incident on metal obliquely .It shows that the coefficient is reversely proportional to the cosine ...
This paper derived the formulation of the real efficient emission coefficient secondary electron under the condition that high energy primary electron incident on metal obliquely .It shows that the coefficient is reversely proportional to the cosine ...
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