THE QUARK CLUSTER MODEL OF NUCLEAR FORCE:(Ⅰ) EXPONENTIAL QUARK CONFINEMENT POTENTIAL AND NON-STRANGE BARYONIC SPECTRUM

In this paper it is assumed that the quark-quark two-particle interaction is the Coulomb-like plus exponentially rising confinement potential.The non-strange baryonic spectrum below 2 GeV has been studied consistently by the potential.The calculated position of the resonanees and the predicted mixing angles are in good agreement with experiments. It is shown that the potential can describe successfully the properties of all the low-lying non-strange baryon states.The contribution of the spin-orbit coupling force to the spectrum has also been discussed.     

CALCULATION ON A CLUSTER MODEL FOR THE ELECTRONIC CHARGE DENSITY AT NUCLEAR SITE AND THE ELECTRONIC STRUCTURE PARAMETERS OF α IRON

In order to investigate the M6ssbauer isomer shifts and its related electronic charge densities for some substances, the electronic charge density at nuclear site of a iron have been computed for an octahedral cluster Fe₆ with SCF MS-X_α method. Some other electronic structure parameters of the cluster have also been obtained, such as the orbital energy distri- bution, the electron density of states, the Fermi level and various kinds of electron energies, etc. The cohesive energy of α iron have also been calculated and discussed.     

COMPOSITE FIELD THEORY AND THE STRATON MODEL(Ⅱ)

On the basis of previous papers,this work discusses the theory of composite fields composed of colored stratons.Varicus equivalent representations of the S-matrix elements are given.The formulae for the transition matrix elements between states involving baryons in the theory of Straton Model are derived.Finally,the field- current relations are extended to spin 1/2 baryons and their applications are discussed.     

THE GENERATOR COORDINATE METHOD AND NUCLEAR COLLECTIVE MOTIONS (Ⅷ) THE CHOICE AND REPRESENTATION OF COLLECTIVE DEGREES OF FREEDOM

The choice and representation of degrees of freedom of collective motions are thoroughly discussed. Starting from the dynamical group of a shematic model, it is pointed out that the number of independent collective degrees of freedom is uniquely determined, although there exist different continuous variable or boson representations. If more collective degrees of freedom were involved, there must be accompanied conditions.     

PARTIAL RESTORATION OF THE CHIRAL SYMMETRY AND THE π CONDENSATION IN NUCLEAR MATTER

From the relativistic semiclassieal theory of π condensation[1], we deduced that, in the σ model, because of the variation of the radius of the magic circle with nuclear density, the π condensation in nuclear matter is possible. The calculated critical density is slightly higher than that of the normal ground state nuclear matter.     

ON NUCLEAR SINGLE-PARTICLE POTENTIALS (Ⅱ) THE NONHERMITIAN CHOICE

The cancellation properties of the nonhermitian single-particle （SP） potential u_αβ=M_αβ （ε_β） [or M_αβ（ε_α）] according to the principle of maximal cancellation of perturbation diagrams are investigated in detail. The mass operator M_αβ（ω） is separated into two parts M_αβ^on （ω） and M_αβ^off （ω） as usual, however, a new criterion for their definition will be proposed. It is shown that the exact mass operator insertion is equal to the sum of the following three types of terms:（1） terms contributed by the poles of M_αβ^off（ω）. They are truly non-factorizable and must be considered separately,（2） terms which can be cancelled to all orders by the nonhermitian choice u_αβ=M_αβ （ε_β） [or M_αβ（ε_α）]. Hence, they serve to define u_αβ,（3） the remaining terms, which can be summed to all orders in a simple way and may be interpreted as amplitude renormalization of the SP Green function.In order to illustrate the usefulness of the above results, we have considered the renormalized random phase approximation （RRPA） for the particle-hole Green function as an example. Related formulae are derived. In RRPA, not only the SP propagator renormalization which includes all the effects except those contributed by the poles of M_αβ^off （ω）, but also the off energy shell property of the G matrix elements have been taken into account.     

SENIORITY AND K-STRUCTURE OF THE CARNKED SHELL MODEL WAVE FUNCTION (Ⅰ) EVEN-EVEN NUCLEI

With increasing the rotational frequency ω,the seniority V-structure and the K-structure of the CSM wave function become very complicated.For not too high ω(hω≤0.5MeV) configurations with V=0,2,4 are dominant for the low-lying bands,while those with V≥6 are negligibly small.Configurations with various K-values (│K│≤10) are comparable and the nucleus deviates from axial-symmetry significanly.The variation of the gap parameter with ω are analysed also.     

DISPERSIVE THEORY AND NUMERICAL COMPUTATION OF THE ACOUSTIC-GRAVITY WAVE IN TWO-LAYER MODEL

Based on the two-layer model suggested by Pekeris, a developed theory of the dispersionof the acoustic-gravity wave dealing with a constant wind speed in each layer is discussed in thispaper. From the basic wave equations of the acoustic-gravity wave,the confluent hypergeometic equa-tion for the two-layer model with a constant wind speed is derived,and its general solutions aregiven.We obtain the dispersive equation by utilizing the continuous condition of the vertical veloc-ity of air particle motion and the sound pressure on the boundary between the two layers,aswell as the stiffness condition on the ground.The analytical representations of the phase andgroup velocities are also given. The methods of the computation are given in detail.The results of numerical calculation onthe computer show that the wind speeds have a great effect on the propagation of the acoustic-gravity wave.The phase and group velocities depend on the wind speeds in two layer.Theexcited cutoff frequency of the acoustic-gravity wa     

ON THE PROBLEM OF THE DUAL CHARGE (MAGNETIC MONOPOLE) OF NON-ABELLAN GROUPS (Ⅱ)

The method of relating the gauge potential to the connection on a spherical surface developed in a previous paper is generalized to the discussion of the potential of an SU(2) magnetic monopole with O(5) symmetry. Expressions for the potential of the monopole with double string singularity or single string singularity are obtained. Finally, by a combined coordinate-gauge transformation, we obtain a string free expression for an SU(2) magnetic monopole with O(5) symmetry.     

THE GENERATOR COORDINATE METHOD AND NUCLEAR COLLECTIVE MOTIONS (Ⅳ) TDGCM VERSUS ATDHF

Considering the time-dependent generator coordinate method, the time-dependent Schrodinger equation for nuclear collective motions is obtained. It is then possible to obtain through Wigner matrix a variational expression for mean collective properties q(t) and p(t) in classical limits. Under adiabatic approximation this is just the expression by which Villars has obtained the ATDHF results.     

MEASUREMENT,ANALYSIS AND MODEL CALCULATION OF TRAFFIC NOISE NEAR THE BOAD INTERSECTIONS

Measured results and statistical analyses of traffic noise near the road intersections with traffic controlsignals are presented.It was found that the traffic noise near intersections is 3 to 7 dB(A)higher than the noiseof freely flowing road traffic in statistical noise levels L_(50) and L_(90),but no signifcant difference in L_(10) andequivalent continuous noise level L_(eq). The reason of higher L_(50) near intersections is considered to be due to the contribution to the total noiseenergy by the moving traffic in the crossing road,after comparing the neasured value of L_(50) with thecalculated result based on a simple source model of road intersections. The traffic noise level was not found to vary with the traffic signals.     

THE PROTON AND NEUTRON SUBSHELLS AND THE INTERPLAY BETWEEN THEM (Ⅱ) RARE EARTH REGION

Based on the experimental data of even-even nuclei in rare earth region, a further study on the interplay between subshells of two kinds of nucleons has been carried out. Emphasis is placed on the characteristice and N, I dependence of Z=64 subshell. Theoretical explanation is given in terms of the Nilsson diagram and a simplified calculation of n-p interactions.     

SOME DISCUSSIONS ON THE SU(3)×U(1) ELECTRO-WEAK UNIFIED MODEL OF LEPTONS AND QUARKS

In this paper we discussed the following problems in the SU(3)×U(1) unified model proposed earlier: (ⅰ) Two possible choices of the Higgs fields and their comparison with the Weinberg-Salam model; (ⅱ) The form of the Higgs self potential and the realization of the spontaneous symmetry breaking; (ⅲ) The relation between the mass spectrum and the generalized Cabibbo mixing angles in a model with several generations of fermions.     

ON THE CONTROL OF RINGING NOISE EXCITED BY IMPACT II:THE ENERGY OF RINGING NOISE AND THE BUFFERING OF THE IMPACT

In the first of these two papers,the expression for the total energy of vibration excited by impacthas been obtained.In this paper the energy equation of ringing noise was derived from the resultof the first paper.This energy equation indicates the approaches to control ringing noise.Thebuffering method was discussed here in detail.The experiment which has been conducted was describedalso.     

STUDIES OF ρ AND K* MESONS DECAY BY THE ONEGLUON-EXCHANGE QUARK-ANTIQUARK PAIR CREATION MODEL

Decay rates of ρ-meson into two π mesons and K* into Kπ mesons are calculated by using the One-Gluon-Exchange Quark-Antiquark pair creation model.The results are in agreement with the experimental data.     

SEEKING FOR THE U(5) LIMITING CASE OF IBA-Ⅱ

In the region of even-even nuclei from A=96 to A=120, only the energy spectrum of ¹¹⁰₄₈Cd₆₂ may be described by IBA-Ⅱ involving the states {N_π +N _L -1,1}. But it can be described by IBA-Ⅰ too. To distinguish these two schemes, more angular momentum measurement is needed.     

A STUDY ON THE ULTRASONIC VELOCITY AND ATTENU-ATION IN NdFeB MAGNET WITHIN THE TEMPERATURE RANGE OF 80 - 300K (Ⅱ)

Based on the ultrasonic measurements of an isotropic NdFeB magnet in the temperature range of 77 - 300 K, it was found that the elastic parameters, such as Young's modulus E, and Poisson ratio v, change abruptly near the spin reorientation temperature Tsr. This indicates that soft mode emerges in the process of spin reorientation. Thermal hysteresis was observed during heating-up and cooling-down processes. Both Debye temperature and heat capacity were calculated, which suggests that the magnetic entropy of the Nd-sublattice is larger in easy-cone state than in easy-axis state.     

A STUDY ON THE ULTRASONIC VELOCITY AND ATTENU-ATION IN NdFeB MAGNET WITHIN THE TEMPERATURE RANGE OF 80 - 300K (Ⅱ)

Based on the ultrasonic measurements of an isotropic NdFeB magnet in the temperature range of 77 -300 K, it was found that the elastic parameters, such as Young's modulus E, and Poisson ratio v, change abruptly near the spin reorientation temperature T_sr. This indicates that soft mode emerges in the process of spin reorientation. Thermal hysteresis was observed during heating-up and cooling-down processes. Both Debye temperature and heat capacity were calculated, which suggests that the magnetic entropy of the Nd-sublattice is larger in easy-cone state than in easy-axis state.     

FINE STRUCTURES OF INCLUSIVE SPECTRA(Ⅰ)——SUM RULES AND THE GENERALIZATION OF FEYNMAN-YANG SCALING

Important implications of the fine structure of inclusive spectra(to be calledinclusive and semi-inclusive spectra of nearby particles,which represent the local dis-tributions of nearby particles in three-dimensional phase space with rapidity y and transverse momenta P_⊥x, P_⊥z as independent coordinates are explained,and some basicfeatures of the fine stucture are found,namely,sum rules and the generalized formof the Feynman-Yang scaling.One of the sum rules,for example,is:where f_(1;k) denotes the normalized invariant inclusive cross section of k closely neigh-boring particles.It follows that the inclusive the spectra of nearby particles arequalitatively different from the usual ones.The generalized form of the Feynman-Yang scaling for the case of k closelyneighboring particles,for example,is:f_(1;k)(s,x₁,P_⊥1,…x_k,P_⊥k⁾∞,（s→∞,x₁≤x₂≤…≤x_k）.where‘∞’denotes‘approaches a definite limit’.For k=2,the existing experimentaldata for the rapidity gap-length distributions show that for FNAL energies,f_(1,k） isalready close to its limiting form.The inclusive（semi-inclusive）spectra of nearbyparticles way be able to reflect effectively short-range correlation effects.