[en] The reaction cross section at intermediate energies is calculated from a variety of neutron rich isotopes with energies ranging from 50 to 70 MeV/nucleon. The semiclassical approach is used in order to get the total reaction cross section. The optical potential used depends on the nucleon densities. The densities are from the relativistic mean field theory. Comparison with experimental data is made. (author)

[en] Elastic ²⁸Si-²⁸Si scattering has been studied microscopically with special emphasis on quasimolecular and barrier resonances in high partial waves. Schematic application of the double resonance mechanism predicts intermediate structures in the excitation functions in qualitative agreement with the experimental data. (orig.)

[en] The scaled factorial moments F_q are studied for ²⁸Si-AgBr collisions at 14.6AGeV. These moments follow the generalized power law < F_q(M)>∝[g(M)]^φ_q. The values of φ_q/φ₂ obtained from the linear fits of ln< F_q> versus ln< F₂> graphs are found to obey the Brax-Peschanski formula with Levy index μ=1.635+/-0.012 for η space and μ=1.801+/-0.003 for φ space. These values lie within the Levy stable region 0=<μ=<2. An analytical continuation of the Brax-Peschanski formula has been used to obtain the multifractal spectra f(α_q) in negative q region

[en] The crystal blocking technique has been used to measure delay times in the fission channel for excited nuclei produced in the ²⁸Si+^natPt reaction. Experimental results range from 10^-17 to 10^-18 s at bombarding energies from 140 to 170 MeV. It is shown that fission barriers keep their double-humped structure for temperature up to 1.7-1.8 MeV, and that the lifetimes of excited states in the second potential well contribute essentially to the observed delay times in the fission channel

[en] There are many new results in the study of the heavy-ion fusion hindrance phenomenon at extreme sub-barrier energies since Fusion03. Some of them have been published. Presented are some new results, including the first evidence in fusion hindrance for a system with small negative Q-value, 28Si + 64Ni, and the impact of fusion hindrance on reactions of interest to astrophysics

[en] A relatively simple procedure has been used to calculate the differential cross sections for ²⁸Si + ²⁸Si elastic scattering at E_lab = 67, 74, 77, and 120 MeV. The nuclear interactions have been calculated microscopically using the equivalence relation between the matrix elements of the generator coordinate and the resonating group methods from the two-nucleon potential, which explains the two-nucleon data fairly well. The absorption effects due to the opening of the nonelastic channels are taken into account approximately by the classical sharp cutoff of partial waves. The calculated results are in quite good agreement with the available experimental data at most of these energies. (20 refs., 3 figs.)

[en] Published in summary form only. 2 figs

[en] In the framework of an l-window model for complete fusion reactions within a sharp cutoff approximation, the problem of the maximum excitation energy which can be deposited in a compound nucleus is discussed. Predictions about the spin distribution of the compound nucleus are compared with the conclusions of a recent analysis of the ²⁸Si+²⁸Si fusion reaction

[en] The intermittency effect has been studied for the interactions of 4.5 A GeV/c²⁸Si with nuclear emulsions using the distributions of both the pseudorapidity interval and the azimuthal angle interval of the shower particles emitted in the central rapidity region. The reduced scaled factorial moments as a function of the bin size in pseudorapidity and in azimuthal angle have been calculated and have revealed the presence of an intermittent behavior which may be due to the random cascading property of the reaction. The anomalous dimension is increasing with the rank of the moment. (author)

[en] We present new data on target fragmentation in ²⁸Si-AgBr interactions at 14.5 AGeV. A two dimensional emission angle - azimuthal angle target plot of target fragments indicate an anisotropy in angular distribution and a preferential forward and backward emission of target fragments. We also present an investigation on the two-particle and three-particle short-range angular correlation among the target fragments in azimuthal angle space. The experimental data have been compared with Monte Carlo simulated events to extract dynamical correlation. The data exhibit strong two particle and three particle correlation among target fragments in azimuthal space. (author)