2002 Vol. 26, No. 11
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Abstract:
We report the results of a search for the semileptonic decays D+→e+ν,D+→K－π+e+ν,D0→K－e+ν and D0→K－μ+ν using the BES detector at the BEPC e+e－ Collider. Using a data sample of 22.3pb－1 collected at the center of mass energy s=4.03GeV, we select 2472±8...
We report the results of a search for the semileptonic decays D+→e+ν,D+→K－π+e+ν,D0→K－e+ν and D0→K－μ+ν using the BES detector at the BEPC e+e－ Collider. Using a data sample of 22.3pb－1 collected at the center of mass energy s=4.03GeV, we select 2472±8...
Abstract:
We study the different properties of the two jet like events in e+e－→Z0→hadrons under different color connections with the aid of the event generator JETSET. We find that the two kinds of colour connections at the interface of perturbative and nonper...
We study the different properties of the two jet like events in e+e－→Z0→hadrons under different color connections with the aid of the event generator JETSET. We find that the two kinds of colour connections at the interface of perturbative and nonper...
Abstract:
The 3 jet events produced in e+e－ collisions at 91.2GeV have been studied using Monte Carlo method. After applying two angular cuts the three angles between the jets are used to identify the individual jet in 3 jet events. The energy distributions of...
The 3 jet events produced in e+e－ collisions at 91.2GeV have been studied using Monte Carlo method. After applying two angular cuts the three angles between the jets are used to identify the individual jet in 3 jet events. The energy distributions of...
Abstract:
The reaction of 22Na(p,γ)23Mg has been investigated at the Radioactive Ion Beam Line in Lanzhou(RIBLL) using a radioactive beam 23Al. The β+ delayed proton decay spectrum has been measured with the TOF-ΔE method and zero degree detectors. The half li...
The reaction of 22Na(p,γ)23Mg has been investigated at the Radioactive Ion Beam Line in Lanzhou(RIBLL) using a radioactive beam 23Al. The β+ delayed proton decay spectrum has been measured with the TOF-ΔE method and zero degree detectors. The half li...
Abstract:
Spectral statistics for six particles in single j and two j model coupled with a deformed core are studied in the frames of particles rotor model and cranking shell model. The nearest neighbor distribution of energy levels and spectral rigidity are s...
Spectral statistics for six particles in single j and two j model coupled with a deformed core are studied in the frames of particles rotor model and cranking shell model. The nearest neighbor distribution of energy levels and spectral rigidity are s...
Abstract:
Within Brueckner-Hartree-Fock framework,the equation of state of nuclear matter has been investigated by adopting the charge dependent Argonne V18 two-body realistic force and the microscopic three-body forces based on a meson-exchange model. The con...
Within Brueckner-Hartree-Fock framework,the equation of state of nuclear matter has been investigated by adopting the charge dependent Argonne V18 two-body realistic force and the microscopic three-body forces based on a meson-exchange model. The con...
Abstract:
An exactly solvable mean filed plus nearest orbit pairing model for describing the well deformed nuclei is adopted for study of the nuclei in rare earth and actinide regions. Binding energies and pairing excitation energies of 158—171Er,160—178Yb,170...
An exactly solvable mean filed plus nearest orbit pairing model for describing the well deformed nuclei is adopted for study of the nuclei in rare earth and actinide regions. Binding energies and pairing excitation energies of 158—171Er,160—178Yb,170...
Abstract:
The spallation neutron source induced by high energy protron nucleus interaction is an important link for acceralator driven system. The quantum molecular dynamics (QMD) model is applied to analize the high energy proton induced reactions on 208Pb. T...
The spallation neutron source induced by high energy protron nucleus interaction is an important link for acceralator driven system. The quantum molecular dynamics (QMD) model is applied to analize the high energy proton induced reactions on 208Pb. T...
Abstract:
The pre-equilibrium correction for the nuclear reactions induced by fast neutron is considered as follows: the nuclear reaction processes with the exciton number equal to or larger than five can still be described by the statistical theory of the nuc...
The pre-equilibrium correction for the nuclear reactions induced by fast neutron is considered as follows: the nuclear reaction processes with the exciton number equal to or larger than five can still be described by the statistical theory of the nuc...
Abstract:
The data of multi particle production in SNN=130 GeV Au+Au collisions are analyzed by two source statistical model. It is found that in this reaction the two sources (inner source and outer source) are identical. They have the same temperature, volum...
The data of multi particle production in SNN=130 GeV Au+Au collisions are analyzed by two source statistical model. It is found that in this reaction the two sources (inner source and outer source) are identical. They have the same temperature, volum...
Abstract:
Taking the interactions between quarks into account, we study thermodynamics of strange quark matter system in the quasi-particle approximation with the result that an extra term should be added to the thermodynamic potential density considering the ...
Taking the interactions between quarks into account, we study thermodynamics of strange quark matter system in the quasi-particle approximation with the result that an extra term should be added to the thermodynamic potential density considering the ...
Abstract:
The energy resolution and time resolution of two φ75×100 BGO (bithmus germanate) detectors for high energy γ ray newly made were measured with 137Cs and 60Co resources. The two characteristic γ rays of high energy emitted from the thermal neutron cap...
The energy resolution and time resolution of two φ75×100 BGO (bithmus germanate) detectors for high energy γ ray newly made were measured with 137Cs and 60Co resources. The two characteristic γ rays of high energy emitted from the thermal neutron cap...
Abstract:
Some advanced techniques to optimize the emittance measurement devices have been studied, such as thin lens approximation, multi changing focusing strength, optimizing the position of the profile monitor and software improvement for accurate data acq...
Some advanced techniques to optimize the emittance measurement devices have been studied, such as thin lens approximation, multi changing focusing strength, optimizing the position of the profile monitor and software improvement for accurate data acq...
Abstract:
The stress distortion and a cooling method of crystal of double crystal monochromator and its experimental result are reported. The crystal, cooled by this method and exposed to the heat load of total power of 210W and the peak power density of 1.28W...
The stress distortion and a cooling method of crystal of double crystal monochromator and its experimental result are reported. The crystal, cooled by this method and exposed to the heat load of total power of 210W and the peak power density of 1.28W...
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Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
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- Cosmology
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