1988 Vol. 12, No. 3
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Abstract:
A positron CT camera system using multiwire proportional chambers as detectors is reported.This system is composed of two high density MWPC γ-ray detectors,an electronic readout system and a computer for data processing.The tomography of three dimens...
A positron CT camera system using multiwire proportional chambers as detectors is reported.This system is composed of two high density MWPC γ-ray detectors,an electronic readout system and a computer for data processing.The tomography of three dimens...
Abstract:
A non-focusing magnetic spectrometer design for electron scattering in medium energy region is proposed.The positions read out from the position-sensitive detectors in the spectrometer are used for track reconstruction and momentum measurement by mea...
A non-focusing magnetic spectrometer design for electron scattering in medium energy region is proposed.The positions read out from the position-sensitive detectors in the spectrometer are used for track reconstruction and momentum measurement by mea...
Abstract:
The pion fragmentational function is calculated.In high energy region,the asymptotic freedom perturbation theory is used.After passing through a certain distance the quarks break into hadrons because of confinement,which plays a role in the low energ...
The pion fragmentational function is calculated.In high energy region,the asymptotic freedom perturbation theory is used.After passing through a certain distance the quarks break into hadrons because of confinement,which plays a role in the low energ...
Abstract:
The BRS charge QB of BRSSS Spinning String model in Md×G space-time is explicitly given.By means of the nilpotency of the BRS charge,the critical dimension and parameters αR and αNS could be fixed;and with the help of the BRS charge a BRS invariant f...
The BRS charge QB of BRSSS Spinning String model in Md×G space-time is explicitly given.By means of the nilpotency of the BRS charge,the critical dimension and parameters αR and αNS could be fixed;and with the help of the BRS charge a BRS invariant f...
Abstract:
We constructed an SU(9) grand unified preon model which satisfies the complementarity principle between Higgs phase and confining phase.The model ends up with the prediction of four generations of quarks and leptons,and an appropriate hypercolor scal...
We constructed an SU(9) grand unified preon model which satisfies the complementarity principle between Higgs phase and confining phase.The model ends up with the prediction of four generations of quarks and leptons,and an appropriate hypercolor scal...
Abstract:
The fundamental U(1)-lattice-gauge-Higgs system with radial degrees of freedom in d=4 is studied by using variational-cumulant expansion method.Equations for determining the first-order phase transitions of the model is given.Our result is qualitativ...
The fundamental U(1)-lattice-gauge-Higgs system with radial degrees of freedom in d=4 is studied by using variational-cumulant expansion method.Equations for determining the first-order phase transitions of the model is given.Our result is qualitativ...
Abstract:
Using the empirical formula on FN(Fe)/FN(D) found by us and generalizing the method used by CERN UA1 Collaboration in analysing the process p+Fe→2jet+X,a simple method to calculate p+Fe→2jet+X process is presented.Our results are compared with experi...
Using the empirical formula on FN(Fe)/FN(D) found by us and generalizing the method used by CERN UA1 Collaboration in analysing the process p+Fe→2jet+X,a simple method to calculate p+Fe→2jet+X process is presented.Our results are compared with experi...
Abstract:
A specialkind of soliton solution in the skyrme model with the haryon number B=2 is investigated and quantized.The resultant mass spectrum is found to possess some peculiar properties but still in agreement with experiments.Our further studies show t...
A specialkind of soliton solution in the skyrme model with the haryon number B=2 is investigated and quantized.The resultant mass spectrum is found to possess some peculiar properties but still in agreement with experiments.Our further studies show t...
Abstract:
By using group representation theory,the quasi-adiabatic approximation solution of the schrodinger equation of a quantum system with slowly-changing Hamiltonian are presented in this paper.We not only obtained the Berry phase factor and strictly prov...
By using group representation theory,the quasi-adiabatic approximation solution of the schrodinger equation of a quantum system with slowly-changing Hamiltonian are presented in this paper.We not only obtained the Berry phase factor and strictly prov...
Abstract:
The similarity of the charge form factors observed experimentally between 3He and 3H and the central hole of 3He charge density are in conflict with traditional nuclear structure theory.We claim that these conflicrs are strong singnals for the existe...
The similarity of the charge form factors observed experimentally between 3He and 3H and the central hole of 3He charge density are in conflict with traditional nuclear structure theory.We claim that these conflicrs are strong singnals for the existe...
Abstract:
In this paper,some methods of producing local skew quadrupole field in accelerator ring are studied.It can be used to find the suitable positions and strength of skew quadrupole field to remove the coupling between horizontal and vertical oscillation...
In this paper,some methods of producing local skew quadrupole field in accelerator ring are studied.It can be used to find the suitable positions and strength of skew quadrupole field to remove the coupling between horizontal and vertical oscillation...
Abstract:
The beam test of the 250MeV section of BEPC 1.1/1.4GeV e± LINAC was performed four times during its installation phase.In May of 1987,electron beam of 760mA and 250MeV was obtained and positron beam current of 2.5mA and 99MeV was observed when an ele...
The beam test of the 250MeV section of BEPC 1.1/1.4GeV e± LINAC was performed four times during its installation phase.In May of 1987,electron beam of 760mA and 250MeV was obtained and positron beam current of 2.5mA and 99MeV was observed when an ele...
Abstract:
Complete fusion cross sections have been measured for 12C+159Tb and 12C+165Ho reactions by using K-X rays of evaporation residues with Si(Li)spectrometer.The half-lives of evaporation residues and its yield distributions as a function of incident ene...
Complete fusion cross sections have been measured for 12C+159Tb and 12C+165Ho reactions by using K-X rays of evaporation residues with Si(Li)spectrometer.The half-lives of evaporation residues and its yield distributions as a function of incident ene...
Abstract:
Angular distributions of fission fragments were measured for a series of compound nuclei formed in the bombardment of 169Tm,175Lu,181Ta,W,Re,Pt,197Au,Pb and 209Bi by 12C ions with mica track detectors and gold surface barrier silicon detectors.All th...
Angular distributions of fission fragments were measured for a series of compound nuclei formed in the bombardment of 169Tm,175Lu,181Ta,W,Re,Pt,197Au,Pb and 209Bi by 12C ions with mica track detectors and gold surface barrier silicon detectors.All th...
Abstract:
A simple approach of Coulomb correction to the p-4He low energy scattering phase shifts is proposed,in which the channel radius of each partial wave is taken as an adjustable parameter.By using the Coulomb correction the n-4He scattering observables ...
A simple approach of Coulomb correction to the p-4He low energy scattering phase shifts is proposed,in which the channel radius of each partial wave is taken as an adjustable parameter.By using the Coulomb correction the n-4He scattering observables ...
Abstract:
ACQM is applied to study the μ－-mesenic molecules (αp,μ－) and (αp,2μ－).It is found that the ground state X2Σ+ of (αp,2μ－) is the repulsive one and the ground state X1Σ+ of (αp,2μ－) is a bound state with the equilibrium proton-proton separation Re=0.0...
ACQM is applied to study the μ－-mesenic molecules (αp,μ－) and (αp,2μ－).It is found that the ground state X2Σ+ of (αp,2μ－) is the repulsive one and the ground state X1Σ+ of (αp,2μ－) is a bound state with the equilibrium proton-proton separation Re=0.0...
Abstract:
Based on the recommended level density formula of the Fermi gas model and considering the modifications at low excitation energy,a synthesis level density formula is proposed.From the mean neutron resonance spacing Dexp for 248 nuclei and the cumulat...
Based on the recommended level density formula of the Fermi gas model and considering the modifications at low excitation energy,a synthesis level density formula is proposed.From the mean neutron resonance spacing Dexp for 248 nuclei and the cumulat...
Abstract:
SO(Bvπ)(6) limit of U(B)(6)×U(v)(12)×U(π)(4) dynamical symmetry in odd-odd nuclei is discussed Energy formula and wave functions are obtained,and exaetd expressions for E2 trasition rates and and one-nucleon transfer intensities are derived.The spect...
SO(Bvπ)(6) limit of U(B)(6)×U(v)(12)×U(π)(4) dynamical symmetry in odd-odd nuclei is discussed Energy formula and wave functions are obtained,and exaetd expressions for E2 trasition rates and and one-nucleon transfer intensities are derived.The spect...
Abstract:
The E2 reduced transition probabilities between the d-a cluster states of 6Li were calculated by the RGM in this paper.The resulting B(E2;E1→E0)=21.06fm4 consistented with the experimental value 25.1±2.0fm4 more than the calculated values of the doub...
The E2 reduced transition probabilities between the d-a cluster states of 6Li were calculated by the RGM in this paper.The resulting B(E2;E1→E0)=21.06fm4 consistented with the experimental value 25.1±2.0fm4 more than the calculated values of the doub...
Abstract:
We present a variational calculation of C=+1 and C=－1 glueball masses in 2+1 dimensional SU(3) lattice gauge theory using a Hamiltonian in which the ground state is exactly known.In the range 0<1/g2≤6,we obtain good scaling behaviour am+=36.1g2 and a...
We present a variational calculation of C=+1 and C=－1 glueball masses in 2+1 dimensional SU(3) lattice gauge theory using a Hamiltonian in which the ground state is exactly known.In the range 0<1/g2≤6,we obtain good scaling behaviour am+=36.1g2 and a...
Abstract:
The effect of the interference of odd and even waves on the spatial correlation of a pair of valent nucleons has been investigated.
The effect of the interference of odd and even waves on the spatial correlation of a pair of valent nucleons has been investigated.
Abstract:
The assumption of indistinguishability of quarks in the region of overlapping of nucleon wave functions leads to the model of joint possessing of quarks between nucleous.Besides the examination by the data of A-dependent EMC effect,the model gives th...
The assumption of indistinguishability of quarks in the region of overlapping of nucleon wave functions leads to the model of joint possessing of quarks between nucleous.Besides the examination by the data of A-dependent EMC effect,the model gives th...
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