I. N. Kukhtina

Microscopic analysis of the energy dependence of the 6He, 6Li + 28Si total reaction cross sections in the energy range E = 5−50 A MeV

The experimental data on the total cross sections of the 4, 6He, 6, 7Li + 28Si reactions at energies E=5−50 A MeV are reported. The data for the 6Li, 6He + 28Si reactions have been analyzed within the microscopic model of double-folding optical potential, in which the real and imaginary parts are calculated at different densities of the projectile nucleus. The cross sections calculated with the microscopic double-folding Coulomb potential and the standard Coulomb potential for uniform charge distribution are compared with each other. Semimicroscopic potentials providing agreement with experimental data have been constructed on the basis of renormalized microscopic potentials and their derivatives, added to take into account collective effects.

Total cross sections for 4,6He + 28Si reactions measured at 10–28 MeV/A

New results on the energy dependence of the total cross section (σR) for 6He scattering on 28Si in the incident energy range 10–28 MeV/A are obtained. The α-particle-production cross sections for the 28Si(6He, 4He)X channel are measured as well. The secondary beam of 6He with an intensity of up to 5×104 particle/s was generated by bombarding a thick beryllium target with ∼32-MeV/A7Li ions. In the energy region below 17 MeV/A, σR increases sharply. The experimental dependences of the total cross sections are compared with the results of σR calculations using the double-folding potential within the optical model. The energy dependence of σR for 6He differs from that for the neighboring nuclei, which can be associated with the structural features of the former nucleus. The energy spectra of α particles produced in the 6He interactions with silicon indicate two mechanisms of their production: transfer reaction and 6He breakup in the field of the 28Si nucleus.

Microscopic model analysis of the 6He, 6Li+28Si total reaction cross sections at the energy range 5–50 A MeV

The existing and some preliminary experimental data on the total cross sections of the 4,6He, 6,7Li+28Si reactions at energies E=5–50 A MeV are demonstrated. The data on 6Li,6He+28Si are analyzed in the framework of the microscopic optical potential with real and imaginary parts obtained with a help of the double‐folding procedure and by using the current models of densities of the projectile nuclei. Besides, the microscopic double‐folding Coulomb potential is calculated and its effect on cross sections is compared with that when one applies the traditional Coulomb potential of the uniform charge distribution. The semi‐microscopic potentials are constructed from both the renormalized microscopic potentials and their derivatives to take into account collective motion effect and to improve an agreement with experimental data.The existing and some preliminary experimental data on the total cross sections of the

Energy and mass dependences of the parameters of the semimicroscopic folding model for alpha particles at low and intermediate energies

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Total reaction cross section from the interaction of 4He ions with 28Si at 10–30 MeV

He,

Total reaction cross section for 4He collisions with silicon in the energy range 3-10 MeV/u

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ENERGY DEPENDENCE OF TOTAL REACTION CROSS SECTIONS FOR INTERACTION OF 4He WITH THE NUCLEI 28Si AT ENERGIES FROM THE COULOMB BARRIER TO 200 MeV

Li +

INTERACTION OF 4HE-PARTICLES WITH STABLE NUCLEI AND EFFECTIVE NUCLEON-NUCLEON FORCES

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Total reaction cross section from the interaction of 4 He ions with 28 Si at 10

Si reactions at energies E=5-50 A MeV are demonstrated. The data on

TOTAL REACTION AND FUSION-FISSION CROSS SECTIONS MEASURED WITH A 6HE BEAM

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