1979 Vol. 3, No. 6
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Abstract:
A preliminary experimental study of a G-M counter under an additional RF vol-tage and a theoretical analysis of the Geiger threshold voltage under this conditionare presented.
A preliminary experimental study of a G-M counter under an additional RF vol-tage and a theoretical analysis of the Geiger threshold voltage under this conditionare presented.
Abstract:
In this paper,we derived the general formulas for the matrix elements of the two-body spin-orbit interaction between two particles in the shell model.The formulas,which we derived,are simpler than that of J.Hope and L.W.Longdon's.
In this paper,we derived the general formulas for the matrix elements of the two-body spin-orbit interaction between two particles in the shell model.The formulas,which we derived,are simpler than that of J.Hope and L.W.Longdon's.
Abstract:
In this article,we study the field-current relations of the 4-divergence of the axial vector currents.If there exist a series of radial excited state,then 4-divergence of the axialvector current will be identical with the fields of all exciting pseudo-scalar mesons[1].From this relation,we can derive a definite correction to the matrix elements which obtained by PCAC and low energy theorem in the current algebra calculations.Concrete calculations show all results obtained by those corrections agree with the ex-periments.
In this article,we study the field-current relations of the 4-divergence of the axial vector currents.If there exist a series of radial excited state,then 4-divergence of the axialvector current will be identical with the fields of all exciting pseudo-scalar mesons[1].From this relation,we can derive a definite correction to the matrix elements which obtained by PCAC and low energy theorem in the current algebra calculations.Concrete calculations show all results obtained by those corrections agree with the ex-periments.
Abstract:
The possible existence of the narrow width structures in the Antinucleon-Nucleus system is discussed qualitatively by using complex shell model theory.We conclude that the repulsive coherent energy levels exist for one Antinucleon-one nucleon hole system,its energy is quite high and some times higher than the threshold of the system.Its width is narrower than that of the zero order configuration.Experimentally it is possi-ble to find out a number of narrow resonances and bound states.
The possible existence of the narrow width structures in the Antinucleon-Nucleus system is discussed qualitatively by using complex shell model theory.We conclude that the repulsive coherent energy levels exist for one Antinucleon-one nucleon hole system,its energy is quite high and some times higher than the threshold of the system.Its width is narrower than that of the zero order configuration.Experimentally it is possi-ble to find out a number of narrow resonances and bound states.
Abstract:
In the K-M model with two Higgs doublets we introduce permutation symmetryS3and naturally obtain the Cabibho-Like parameter matrix represented approximately by the ratios of the quark masses.The symmetry ofS3representation assignments be-tween right and left-handed quarks is a characteristic of this model.
In the K-M model with two Higgs doublets we introduce permutation symmetryS3and naturally obtain the Cabibho-Like parameter matrix represented approximately by the ratios of the quark masses.The symmetry ofS3representation assignments be-tween right and left-handed quarks is a characteristic of this model.
Abstract:
The Bethe-Salpeter equation for the electromagnetic bound states consisting of a fermion and an anti-fermion of spin1/2 is solved in the Ladder approximation in this paper.The well-known Balmer series is obtained together with the B-S wave functions,which are relativistic covariant,also have correct analytic properties and satisfy the spectra conditions.The results are applied to the processesη0→γ+（e+e-）andη0→γ+（μ+μ-）.It is shown that the creation,annihilation and transition processes of such relativistic electromagnetic bound states can be calculated conveniently by using the approximate B-S wave functions obtained in this paper.
The Bethe-Salpeter equation for the electromagnetic bound states consisting of a fermion and an anti-fermion of spin1/2 is solved in the Ladder approximation in this paper.The well-known Balmer series is obtained together with the B-S wave functions,which are relativistic covariant,also have correct analytic properties and satisfy the spectra conditions.The results are applied to the processesη0→γ+（e+e-）andη0→γ+（μ+μ-）.It is shown that the creation,annihilation and transition processes of such relativistic electromagnetic bound states can be calculated conveniently by using the approximate B-S wave functions obtained in this paper.
Abstract:
This paper discusses the number of solution and physical property of zero energyfermions in the field ofU(1)pointwise monopole.It is interesting to point out thatthe anomaly source of PCAC lies on the monopole,and that the effective electric chargeis concentrated at the point monopole.This paper has separated explicitly the variables in the equation of the half spinparticles with arbitrary isospins moving in the spherical symmetric sourcelessSU(2)gauge field.It is shown that the zero energy solution exists only when the totalangular momentumJ=0 and charge number |v|=1/2;or whenJ=1/2,|v|=1,0.The solutions with isospin equals to one or arbitrary half integrals are given explicitly.
This paper discusses the number of solution and physical property of zero energyfermions in the field ofU(1)pointwise monopole.It is interesting to point out thatthe anomaly source of PCAC lies on the monopole,and that the effective electric chargeis concentrated at the point monopole.This paper has separated explicitly the variables in the equation of the half spinparticles with arbitrary isospins moving in the spherical symmetric sourcelessSU(2)gauge field.It is shown that the zero energy solution exists only when the totalangular momentumJ=0 and charge number |v|=1/2;or whenJ=1/2,|v|=1,0.The solutions with isospin equals to one or arbitrary half integrals are given explicitly.
Abstract:
Instead of the usual model in which the incident proton becomes a neutron and apion,we use a new model in which the incident proton becomes aΔ0and a pion to calculate the angular distributions of the reaction26Mg（p,π+）27Mg.The obtained resu-lts show that there are considerable differences both in magnitudes and patterns of the angular distributions for the two models.
Instead of the usual model in which the incident proton becomes a neutron and apion,we use a new model in which the incident proton becomes aΔ0and a pion to calculate the angular distributions of the reaction26Mg（p,π+）27Mg.The obtained resu-lts show that there are considerable differences both in magnitudes and patterns of the angular distributions for the two models.
Abstract:
A supersymmetric form of the two-dimensional nonlinear model is described.We discover that exact stationary solutions of the coupled equations of motion can be used as the starting point of the bag model.As a special case,we obtain again“SLAC Bag”model.The supersymmetric Sine-Gordon model,hyperbolic sine model,and ex-ponential model are discussed.
A supersymmetric form of the two-dimensional nonlinear model is described.We discover that exact stationary solutions of the coupled equations of motion can be used as the starting point of the bag model.As a special case,we obtain again“SLAC Bag”model.The supersymmetric Sine-Gordon model,hyperbolic sine model,and ex-ponential model are discussed.
Abstract:
In this paper,we have obtained the distribution functions of the velenee quarksby using light-cone algebra,and the neucleon's wave functions and computationaltechnique in the straton model.The parameters of the distribution functions of thevelence quarks are defined by usingvW2pexperimental data.We computedvG1andv2G2and obtained the distribution functions of the velence quarks which possess definitehelicities.The spacetime function of the neueleon's wave functions are taken as theharmonic-like type.There are two kinds of spinor structure,one of them possesses theSU（6）symmetry and the other does not.The theoretical results ofA1p·vW2pare con-sistent with experimental data,but only in the case ofSU（6）symmetry for which weobtained the sum rule 6∫01{vG1p—vG1n}dx=-1.16 The experimental data agrees with the neucleon's wave functions withSU（6）symme-try.
In this paper,we have obtained the distribution functions of the velenee quarksby using light-cone algebra,and the neucleon's wave functions and computationaltechnique in the straton model.The parameters of the distribution functions of thevelence quarks are defined by usingvW2pexperimental data.We computedvG1andv2G2and obtained the distribution functions of the velence quarks which possess definitehelicities.The spacetime function of the neueleon's wave functions are taken as theharmonic-like type.There are two kinds of spinor structure,one of them possesses theSU（6）symmetry and the other does not.The theoretical results ofA1p·vW2pare con-sistent with experimental data,but only in the case ofSU（6）symmetry for which weobtained the sum rule 6∫01{vG1p—vG1n}dx=-1.16 The experimental data agrees with the neucleon's wave functions withSU（6）symme-try.
Abstract:
In this paper the pure configuration shell model with the two-body effective resi-dual interactions deduced from the experimental data is used in the calculations of the spectroscopy properties of the nuclei in the region 40<A<56.The results are com-pared with experimental data, then we believe that for many nuclei with mass number-ranging from 40 to 56 the simple （1f7/2）nmodel is a good approach,especially in the explanation of the higher angular momenta states.But,there are some contraries ex-posing the limitation of this model.
In this paper the pure configuration shell model with the two-body effective resi-dual interactions deduced from the experimental data is used in the calculations of the spectroscopy properties of the nuclei in the region 40<A<56.The results are com-pared with experimental data, then we believe that for many nuclei with mass number-ranging from 40 to 56 the simple （1f7/2）nmodel is a good approach,especially in the explanation of the higher angular momenta states.But,there are some contraries ex-posing the limitation of this model.
Abstract:
An on-line four-parameters data acquisition and Processing method for particle-particle correlation experiment is proposed.Using this method an analysis system has been set up.The detection devices,electronics and a program of a minicomputer are described.Finally the application of this system to several experiments of three body reaction is illustrated.
An on-line four-parameters data acquisition and Processing method for particle-particle correlation experiment is proposed.Using this method an analysis system has been set up.The detection devices,electronics and a program of a minicomputer are described.Finally the application of this system to several experiments of three body reaction is illustrated.
Abstract:
The interaction times of various partial waves for heavy-ions induced deep inelastic collisions（DIC）of six reaction systems are calculated on the basis of elassical dynamics method.The resulting times are related to the energy and angular momen-tum dissipations.The order of magnitude of the interaction times for DIC is about 10-22-4×10-21sec.The Fokker-Planck equation may be correlated with the classical dynamic equation through the interaction times.The interaction times of various partial waves are applied to determine the mass（or element）transport coefficients of various partial waves from experimental mass（or element）distributions.The correla-tion between mass transport coefficients and excitation energies and angular momentum dissipations are discussed.The mechanism of the tangential and radial frictions are analyzed.
The interaction times of various partial waves for heavy-ions induced deep inelastic collisions（DIC）of six reaction systems are calculated on the basis of elassical dynamics method.The resulting times are related to the energy and angular momen-tum dissipations.The order of magnitude of the interaction times for DIC is about 10-22-4×10-21sec.The Fokker-Planck equation may be correlated with the classical dynamic equation through the interaction times.The interaction times of various partial waves are applied to determine the mass（or element）transport coefficients of various partial waves from experimental mass（or element）distributions.The correla-tion between mass transport coefficients and excitation energies and angular momentum dissipations are discussed.The mechanism of the tangential and radial frictions are analyzed.
Abstract:
In this paper,a phenomenological model has been suggested to explain the friction mechanism due to partiele-hole excitation and nucleon exchange at the initial stage of heavy ion collisions.
In this paper,a phenomenological model has been suggested to explain the friction mechanism due to partiele-hole excitation and nucleon exchange at the initial stage of heavy ion collisions.
Abstract:
The fission prompt neutron spectrum,the average number of neutrons emitted per fission and the average energies of neutrons for neutron-induced fission of ura-nium and plutonium isotopes were calculated,using evaporation model with a univer-sal pre-scission neutron component of about 10% added empirically.General appro-ximation formulae for the average number of neutrons per fisson and the averageneutron energy were derived and Terrell's formula was rederived theoretically without adjustable constants.In the incident neutron energy range 0—18 MeV considered,the agreement between calculated and experimental results is satisfactory.NUCLEAR FISSION:U,Pu(n,f);energy range 0—18 MeV;fission prompt neutron spectrum,average number of emittedneutrons and neutron average energy calculated.
The fission prompt neutron spectrum,the average number of neutrons emitted per fission and the average energies of neutrons for neutron-induced fission of ura-nium and plutonium isotopes were calculated,using evaporation model with a univer-sal pre-scission neutron component of about 10% added empirically.General appro-ximation formulae for the average number of neutrons per fisson and the averageneutron energy were derived and Terrell's formula was rederived theoretically without adjustable constants.In the incident neutron energy range 0—18 MeV considered,the agreement between calculated and experimental results is satisfactory.NUCLEAR FISSION:U,Pu(n,f);energy range 0—18 MeV;fission prompt neutron spectrum,average number of emittedneutrons and neutron average energy calculated.
Abstract:
In this paper we point out that the hadronic production of J/Ψparticle shouldcontain the radiative decay ofxcwhich is produced in hadron collsions.Our resultsshow that :（1）The difference between the effective coupling constant of J/Ψand stratonsand the effective coupling constant ofΨ′ and stratons is reasonably decreased.（2）The main results in previous work are preserved.（3）The fractions of J/Ψ′s producedvia the photonic decay of theXcstates are obtained at different √sin the fourprocesses.Finally,we simply compare this model with the production via gluon.
In this paper we point out that the hadronic production of J/Ψparticle shouldcontain the radiative decay ofxcwhich is produced in hadron collsions.Our resultsshow that :（1）The difference between the effective coupling constant of J/Ψand stratonsand the effective coupling constant ofΨ′ and stratons is reasonably decreased.（2）The main results in previous work are preserved.（3）The fractions of J/Ψ′s producedvia the photonic decay of theXcstates are obtained at different √sin the fourprocesses.Finally,we simply compare this model with the production via gluon.
Abstract:
Based onSU4×SU'3model,we discuss the arrangement ofγ-family in the 8representation of SU'3color space.
Based onSU4×SU'3model,we discuss the arrangement ofγ-family in the 8representation of SU'3color space.
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