1990 Vol. 14, No. 6
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Abstract:
The first measurement results of the characteristics of the synchrotron radiation spot from the photon beam line 4W1A,such as the size,intensity,energy,spectrum and position stability are reported in this paper.The results are quite consistent with t...
The first measurement results of the characteristics of the synchrotron radiation spot from the photon beam line 4W1A,such as the size,intensity,energy,spectrum and position stability are reported in this paper.The results are quite consistent with t...
Abstract:
The inelasticity of p-air and A-air interactions of superhigh energy cosmic rays is analysed and the influence of the nuclear collision geometry is investigated.
The inelasticity of p-air and A-air interactions of superhigh energy cosmic rays is analysed and the influence of the nuclear collision geometry is investigated.
Abstract:
In this paper,we present the design and construction of the luminosity monitor,the main features of the detectors,and the functions of the functions of the read-out circuits and data acquisition system of the Beijing spectrometer (BES).In october of ...
In this paper,we present the design and construction of the luminosity monitor,the main features of the detectors,and the functions of the functions of the read-out circuits and data acquisition system of the Beijing spectrometer (BES).In october of ...
Abstract:
The canonical transformation in two dimensional Heisenberg antiferromagnetic system is given in this paper.It is found that under this transformation the 2D Heisenberg antiferromagnetic model is the nonlinear O(3) σ model with a topological term in t...
The canonical transformation in two dimensional Heisenberg antiferromagnetic system is given in this paper.It is found that under this transformation the 2D Heisenberg antiferromagnetic model is the nonlinear O(3) σ model with a topological term in t...
Abstract:
In this paper we give the helicity formalism of the angular distribution for processes e+e－→J/ψ→V+X,V→P1P2 and e+e－→J/ψ→V+X,X→P4P5.It provides the theoretical formula for e+e－ experimental data analysis.
In this paper we give the helicity formalism of the angular distribution for processes e+e－→J/ψ→V+X,V→P1P2 and e+e－→J/ψ→V+X,X→P4P5.It provides the theoretical formula for e+e－ experimental data analysis.
Abstract:
A Realistic Chiral Tripreon Model with SU(3)×SO(5) metacolor group is obtained This model has a low metacolor energy scale and three generations of composite fermions with the quantum numbers of quarks and leptons of the standard model.This model als...
A Realistic Chiral Tripreon Model with SU(3)×SO(5) metacolor group is obtained This model has a low metacolor energy scale and three generations of composite fermions with the quantum numbers of quarks and leptons of the standard model.This model als...
Abstract:
According to the perturbative QCD method,we have calculated the P⊥ distributive cross sections,the Y distributive cross sections of the large P jets and the final state meson productivities in 800GeV/c Proton-Nucleus (Be,C,Al,Cu and Pb) collisions.Th...
According to the perturbative QCD method,we have calculated the P⊥ distributive cross sections,the Y distributive cross sections of the large P jets and the final state meson productivities in 800GeV/c Proton-Nucleus (Be,C,Al,Cu and Pb) collisions.Th...
Abstract:
The change of the internal energy of the α-particle is usually neglected in the previous calculations of the binding energy of 5He.The present work shows explicitly that the change of the internal energy of the α-particle can influence significantly ...
The change of the internal energy of the α-particle is usually neglected in the previous calculations of the binding energy of 5He.The present work shows explicitly that the change of the internal energy of the α-particle can influence significantly ...
Abstract:
In this paper,the nucleon is described by the MIT bag model,and the internal quark motion in the nucleon is modified by the scalar and vector meson fields.The Fermi motion of nucleon in nuclear matter is considered.The changes for intrinsic propertie...
In this paper,the nucleon is described by the MIT bag model,and the internal quark motion in the nucleon is modified by the scalar and vector meson fields.The Fermi motion of nucleon in nuclear matter is considered.The changes for intrinsic propertie...
Abstract:
Using the many-body field theory the problems of μ－ captures in nuclei are systematically studied.Without ajustable parameter,calculations are performed for the total nuclear capture rates of muon for nuclei ranging from light to heavy ones.It shows ...
Using the many-body field theory the problems of μ－ captures in nuclei are systematically studied.Without ajustable parameter,calculations are performed for the total nuclear capture rates of muon for nuclei ranging from light to heavy ones.It shows ...
Abstract:
The inclusive neutron multiplicity distribution in the heavy-ion reactions measured by a 4π neutron detector is presented in this paper.Results for 40Ar+197Au and 40Ar+232Th at 27,35,44 and 77MeV/u are displayed.The distribution provides an overview ...
The inclusive neutron multiplicity distribution in the heavy-ion reactions measured by a 4π neutron detector is presented in this paper.Results for 40Ar+197Au and 40Ar+232Th at 27,35,44 and 77MeV/u are displayed.The distribution provides an overview ...
Abstract:
The cross sections of 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co reactions have been measured at neutron energy region of 12.8MeV—17.8MeV by activation method.The coveriance matrix of measured errors was calculated,and the comparison between the ...
The cross sections of 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co reactions have been measured at neutron energy region of 12.8MeV—17.8MeV by activation method.The coveriance matrix of measured errors was calculated,and the comparison between the ...
Abstract:
Based on the finite temperature self-consistent semiclassical (FTSCSC) approach and the local density approximation (LDA),the imaginary part of the microscopic nucleon-nucleus optical potential is evaluated and discussed.This work indicates the neces...
Based on the finite temperature self-consistent semiclassical (FTSCSC) approach and the local density approximation (LDA),the imaginary part of the microscopic nucleon-nucleus optical potential is evaluated and discussed.This work indicates the neces...
Abstract:
The dependence of phase transition,associated with the disassembly of hot nuclei,on the mass number of hot nuclei is investigated.By studying six hot nuclei ranging from 56Ni* to 238U*,we find that in the curves of excitation energy of hot nuclei vs....
The dependence of phase transition,associated with the disassembly of hot nuclei,on the mass number of hot nuclei is investigated.By studying six hot nuclei ranging from 56Ni* to 238U*,we find that in the curves of excitation energy of hot nuclei vs....
Abstract:
In the case of central collisions,the collision mechanism of complete,incomplete fusion,and fragmentation were systematically studied via the Boltzmann-Uehling-Uhlenbeck theory which included the nuclear mean field dynamics,two-body collisions,and Pa...
In the case of central collisions,the collision mechanism of complete,incomplete fusion,and fragmentation were systematically studied via the Boltzmann-Uehling-Uhlenbeck theory which included the nuclear mean field dynamics,two-body collisions,and Pa...
Abstract:
The method of determination for average neutron energy from D-T reaction by using two silicon semiconductor detectors and the cross section ratios of 58Ni(n,p)58m+gCo and 58Ni(n,2n)57Ni reactions is described.The plot of the cross section ratio again...
The method of determination for average neutron energy from D-T reaction by using two silicon semiconductor detectors and the cross section ratios of 58Ni(n,p)58m+gCo and 58Ni(n,2n)57Ni reactions is described.The plot of the cross section ratio again...
Abstract:
According to a method of numerical solution of Hill-Wheeler equation proposed by us recently,the dynamic evolution of shapes in the Yrast band of 172Os was calculated.Results show better agreement with the recent lifetime measurement than the normal ...
According to a method of numerical solution of Hill-Wheeler equation proposed by us recently,the dynamic evolution of shapes in the Yrast band of 172Os was calculated.Results show better agreement with the recent lifetime measurement than the normal ...
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ISSN 1674-1137 CN 11-5641/O4
Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
- Particle physics
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- Particle and nuclear astrophysics
- Cosmology
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