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[en] The reduced E2-transition probabilities between the d+α-cluster states of ⁶Li are calculated using the resonating group method. The calculated value of B(E2;E₁→E0) =21.06 fm⁴ is consistent with the experiment result of 25.1±2.0 fm⁴. It is larger than the calculated values of 12.14, 13.11, and 18.14 fm⁴ obtained with a double-well cluster model containing some p-state, and the value of 13.88 fm⁴ obtained with LCCO. The result of B(E2;E₃→E0)=9.67 fm⁴ agrees with the experimental value of 6.483±3.360 fm⁴ within the measurement uncertainty

[en] Using a mathermatical model potential as the fission barrier, the fission rate of ²³⁶U is calculated from the Fokker-Plance equation by means of a complex matrix continued fraction method. The maximum fission rate at a certain viscosity coefficient is also obtained by studying the dependence of the fission rate on the nuclear viscosity. Comparison with results obtained by using Kramers' formula shows that our model could give a better description of the heavy nculeus fission

[en] The E2 reduced transition probabilities between the d-α cluster states of ⁶Li were calculated by the RGM in this paper. The resulting B(E2; E₁ → E₀) = 21.06 fm⁴ is consistent with the experimental value 25.1 ± 2.0 fm⁴ which is more than the calculated values of the double-well cluster model including p-state exciting and LCCO, Also, the B(E2; E₃ → E₀) = 9.67 fm⁴ coincide with the exprimental value 6.483 ± 3.360 fm⁴ within the error range

[en] The data of α-particle induced reactions on ^10,11B at 31.2 MeV have been analyzed by using the programme MARS-SATURN EFR-DWBA method. The results are shown that direct stripping reactions are the main reaction mechanism in most of ^10,11B(α, x)^*C reactions. However, there is direct stripping plus heavy particle stripping in the reactions ¹¹B(α,d₀)¹³C and ¹¹B(α,p₀)¹⁴C. In addition, the mechanism of compound nucleus seems to be taken into account for the peak of intermediate angular region in the reaction ¹¹B(α,p₀)¹⁴C. Finally, the agreement between theoretical calculation and experimental data is satisfactory in those reactions: ¹⁰B(α,p₀)¹³C, ¹⁰B(α,d₁)¹²C^* and ¹¹B(α,d₀)¹³C

[en] The previous dilepton spectrum expression and relativistic hydrodynamic equations derived from the energy-momentum conservation, are generalized to include the effect of the space-time distribution of particles. The influences of the particle distribution and the latent heat released by the phase transition on the dilepton spectrum are studied on the basis of the generalized formalism. We find that these two influences significantly change the characteristic dilepton spectrum for the formation of quark matter given by previous authors, they especially cause the non-monotony of the total dilepton yield with respect to the initial temperature. It is shown that these two influences must be included in order to get a more reasonable characteristic dilepton spectrum for the formation of the quark matter. (orig.)

[en] The relativistic hydrodynamic equations derived from the energy-momentum conservation are generalized to include the equation of the particle number. The influences of the latent heat and particle distribution on the spectrum are studied on the basis of the generalized formalism. It is shown that these influences should be included in order to get a reasonable prediction for the formation of the quark matter

[en] The previously derived relativistic hydrodynamic equation from energy-monentum conservation is generalized to include the particle number conservation. From calculation on the basis of the new formalism it is found that the particle distribution and latent heat significantly change the characteristic dilepton spectrum for the formation of a quark matter, which has been predicted by the other author

[en] The dilepton spectrum emitted in the phase transition process of an expanding quark gluon plasma formed in the collisions of ²³⁸U-²³⁸U and ¹⁸⁴W-¹⁸⁴W at 200 GeV/(cu) is calculated by using the theoretical framework of relativistic hydrodynamics, including the effect of quark flavor kinetics, and phenomenological SU(3) string model is used in the calculation of the quark flavor kinetics. The calculated results are compared with the experimental data from the Center of European Research of Nucleon SPS and analysis is carried out. The results show that the effects of quark fragmentation and flavor kinetics cause a peak suppression of J/ψ→μ⁺μ^-, while the dilepton spectrum increases for small invariant mass. The calculated results show that the phenomena of suppression under the rich-baryon condition is greater than those under the poor-baryon conditions. Under the same conditions of collision, the J/ψ peak suppression produced in ²³⁸U-²³⁸U collisions is greater than that in ¹⁸⁴W-¹⁸⁴W collisions

[en] (1+1) dimensional relativistic hydrodynamics equation with a source term including the quark-fragment effects is numerically solved and the evolution of the energy density, flow rapidity and baryon number density as the characteristic values of the phase transition which is possible to be produced in the nuclear collisions at extreme high energy are also analysed. The quark-fragment effects in the source term are described by using the phenomenal SU(3) string model with a flavor dynamics. The numerical results are compared with Kajantie's data. It illustrates indirectly that the results are in agreement with the experimental data. The physics picture of the model shows that this phenomenological self-consistent model is reasonable