2001 Vol. 25, No. 8
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Abstract:
Three typical schemes of the initial state radiative correction in e+e－ collision through single photon annihilation were reviewed, and the numerical results were calculated in the energy region of 2—5GeV. The differences of the theoretical values of...
Three typical schemes of the initial state radiative correction in e+e－ collision through single photon annihilation were reviewed, and the numerical results were calculated in the energy region of 2—5GeV. The differences of the theoretical values of...
Abstract:
We calculate the hadron multiplicities and the momentum spectra of π±,K±,p/p in e+e－→q+ng→hadrons for the case where the color separate singlet connections occur among the final partons q+ng with the help of JETSET event generator. We compare the res...
We calculate the hadron multiplicities and the momentum spectra of π±,K±,p/p in e+e－→q+ng→hadrons for the case where the color separate singlet connections occur among the final partons q+ng with the help of JETSET event generator. We compare the res...
Abstract:
Based on the quark model, the Q2 evolution of the nucleon spin structure functions in the small Q2 region is calculated. The higher-twist effects a2(Q2) and d2(Q2) are investigated. Comparison with other model calculations is also proceeded.
Based on the quark model, the Q2 evolution of the nucleon spin structure functions in the small Q2 region is calculated. The higher-twist effects a2(Q2) and d2(Q2) are investigated. Comparison with other model calculations is also proceeded.
Abstract:
The high-spin states of 209Fr have been studied in the 197Au(16O,4n)209Fr reaction at 16O energies from 90 to 105 MeV using techniques of in-beam γ-ray spectroscopy. Measurements of γ-ray excitation functions,γ-γ-t coincidences and γ-ray angular dist...
The high-spin states of 209Fr have been studied in the 197Au(16O,4n)209Fr reaction at 16O energies from 90 to 105 MeV using techniques of in-beam γ-ray spectroscopy. Measurements of γ-ray excitation functions,γ-γ-t coincidences and γ-ray angular dist...
Abstract:
Through the 20Na β+ 20Ne→16O+α process,the half-life and β+ delayed α decay spectrum of 20Na have been measured on the Radioactive Ion Beam Line in Lanzhou(RIBLL). The 20Na was identified through TOF-ΔE method and alpha particle was measured by four ...
Through the 20Na β+ 20Ne→16O+α process,the half-life and β+ delayed α decay spectrum of 20Na have been measured on the Radioactive Ion Beam Line in Lanzhou(RIBLL). The 20Na was identified through TOF-ΔE method and alpha particle was measured by four ...
Abstract:
The energy levels of odd-odd nucleus 84Y at low spins were calculated by using the axially symmetric particles plus rotor model. In order to study the statistical properties of the energy levels, the two standard tests of Random-Matrix Theory such as...
The energy levels of odd-odd nucleus 84Y at low spins were calculated by using the axially symmetric particles plus rotor model. In order to study the statistical properties of the energy levels, the two standard tests of Random-Matrix Theory such as...
Abstract:
In terms of the YN interaction based on the chiral SU(3) quark model,the spectra of light hypernuclei 4ΛH,4ΛHe and 5ΛHe are calculated. The result shows that the effective local ΛN potential,as an approximation,cannot offer a reasonable explanation o...
In terms of the YN interaction based on the chiral SU(3) quark model,the spectra of light hypernuclei 4ΛH,4ΛHe and 5ΛHe are calculated. The result shows that the effective local ΛN potential,as an approximation,cannot offer a reasonable explanation o...
Abstract:
By fitting the E2 transition spectra of superdeformed bands in A～190 region, the coefficients of Bohr-Mottelson's I(I+1) expansion are determined and moments of inertia of band head are calculated out. All results show that the moments of inertia of ...
By fitting the E2 transition spectra of superdeformed bands in A～190 region, the coefficients of Bohr-Mottelson's I(I+1) expansion are determined and moments of inertia of band head are calculated out. All results show that the moments of inertia of ...
Abstract:
Within the framework of Skyrme-Hartree-Fock theory based on the extended Skyrme effective interaction, the proton fraction in β-stable neutron stars was investigated for the charge neutrality condition. The density dependence of symmetry energy stren...
Within the framework of Skyrme-Hartree-Fock theory based on the extended Skyrme effective interaction, the proton fraction in β-stable neutron stars was investigated for the charge neutrality condition. The density dependence of symmetry energy stren...
Abstract:
The entrance channel dependence on the isospin effects of the nuclear stopping in intermediate energy heavy ion collisions was studied by using the isospin-dependent quantum molecular dynamics with three forms of the symmetry potential. It shows that...
The entrance channel dependence on the isospin effects of the nuclear stopping in intermediate energy heavy ion collisions was studied by using the isospin-dependent quantum molecular dynamics with three forms of the symmetry potential. It shows that...
Abstract:
Based fully on the finite temperature field theory, we calculate the Feynman diagram to analyse the new infrared divergence caused by the temperature effect in the bremsstrahlung process. It turns out that both of the infrared divergence at the zero ...
Based fully on the finite temperature field theory, we calculate the Feynman diagram to analyse the new infrared divergence caused by the temperature effect in the bremsstrahlung process. It turns out that both of the infrared divergence at the zero ...
Abstract:
For performing mini-β scheme in the Beijing Electron-Positron Collider (BEPC),high RF voltage is supplied for shortening the bunch length,but results in the luminosity decrease. This is the special phenomenon of beam-beam on BEPC, which limits the pe...
For performing mini-β scheme in the Beijing Electron-Positron Collider (BEPC),high RF voltage is supplied for shortening the bunch length,but results in the luminosity decrease. This is the special phenomenon of beam-beam on BEPC, which limits the pe...
Abstract:
Here we give the design proposal of a new DC-RF injector used in high average power FEL. The injector includes a Pierce gun and a 1+1/2 SC cavity. It will be able to provide high average beam current because it can work in CW mode. By changing the sh...
Here we give the design proposal of a new DC-RF injector used in high average power FEL. The injector includes a Pierce gun and a 1+1/2 SC cavity. It will be able to provide high average beam current because it can work in CW mode. By changing the sh...
Abstract:
A scattering proton beam delivery system for conformal therapy and intensity modulated therapy is described. The beam is laterally spread out by a dual-ring doublescattering system and collimated by a program-controlled multileaf collimator and patie...
A scattering proton beam delivery system for conformal therapy and intensity modulated therapy is described. The beam is laterally spread out by a dual-ring doublescattering system and collimated by a program-controlled multileaf collimator and patie...
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