Search

In the modified potential cluster model, the possibility of describing the astrophysical S-factor of radiative p7Ве→8Bγ capture to the ground state of the 8B nucleus at energies from 10 keV to 1 MeV is considered. Potentials of intercluster interactions, matched to the spectra of the 8B nucleus for scattering processes, and the potential of the bound 3Р2 ground state in the p7Ве cluster channel are constructed. The resonance in the 3P1 scattering wave at the energy 0.722 MeV, which leads to an М1-transition to the ground state, is considered. Total cross sections and the reaction rate of p7Ве capture are calculated in the temperature range from 0.01·Т9 to 5·Т9. [ABSTRACT FROM AUTHOR]

Within the framework of the modified potential cluster model with classification of orbital states according to the Young tableaux and revised potential parameters for the HeHe, HHe, and HHe cluster channels of the nuclei Be, Li, and Li, astrophysical S-factors of processes of radiative HeHe capture from 20 keV, HHе capture from 10 keV, and ННе capture from 5 keV are considered. On the basis of the obtained results, the rates of all of the considered reactions are calculated in the temperature range from 0.05 to 5 T and a comparison with the results of other authors is carried out. [ABSTRACT FROM AUTHOR]

The possibility of describing the experimental data for the total cross sections of radiative nB capture to the ground state of the B nucleus at thermal and astrophysical energies is considered within the framework of the modified potential cluster model with classification of orbital states according to Young tableaux. It is shown that it is possible to explain the magnitude of the experimental cross sections at energies from 25.3 meV to 100 keV on the basis of just the E1 transition from the S state of nB scattering to the ground state of the B nucleus in the nB channel. New theoretical results have been obtained for the total cross sections of nB capture to the ground state of the B nucleus. The rates of both reactions are calculated in the temperature range from 0.01 to 5.0 Т. [ABSTRACT FROM AUTHOR]

The possibility of describing the available experimental data on the astrophysical S-factor for the reaction of pC capture to the ground state of N at astrophysical energies within the framework of the modified potential cluster model is considered. [ABSTRACT FROM AUTHOR]

A phase shift analysis has been carried out on the basis of known experimental measurements of the excitation functions of elastic pC scattering at four angles from 90° to 165° and more than 100 energy values from 600-800 to 2200-2400 keV to determine the position of the S resonance at 1.5 MeV. The obtained shape of the resonant S phase shift agrees overall with the characteristics of the corresponding level of the 15N nucleus, and the proposed potential acceptably describes this scattering phase shift. [ABSTRACT FROM AUTHOR]

Within the framework of the modified potential cluster model with forbidden states, the possibility of describing the available experimental data for the total cross sections and astrophysical S-factor of the reaction of pB capture to the ground state of the С nucleus at astrophysical energies is considered. [ABSTRACT FROM AUTHOR]

Within the framework of the modified potential cluster model, the possibility of describing the available experimental data for the total cross sections of the reaction of nB capture at thermal and astrophysical energies is considered. [ABSTRACT FROM AUTHOR]

Within the framework of the modified potential cluster model with forbidden states and with resonant behavior of scattering phases taken into account in some cases, the possibility of describing the available experimental data for the total cross sections of the reaction of nB capture at thermal and astrophysical energies is considered. [ABSTRACT FROM AUTHOR]

We have studied the neutron-capture reactions 10,11B(n, γ) and the role of the 11B(n, γ) reaction in seeding r-process nucleosynthesis. The possibility of the description of the available experimental data for cross-sections of the neutron capture reaction on 10B at thermal and astrophysical energies, taking into account the resonance at 475 keV, was considered within the framework of the modified potential cluster model (MPCM) with forbidden states (FS) and accounting for the resonance behavior of the scattering phase shifts. In the framework of the same model, the possibility of describing the available experimental data for the total cross-sections of the neutron radiative capture on 11B at thermal and astrophysical energies were considered with taking into account the 21 and 430 keV resonances. Description of the available experimental data on the total cross-sections and astrophysical S-factor of the radiative proton capture on 11B to the GS of 12C was treated at astrophysical energies. The possibility of description of the experimental data for the astrophysical S-factor of the radiative proton capture on 14C to the GS of 15N at astrophysical energies, and the radiative proton capture on 15N at the energies from 50 to 1500 keV was considered in the framework of the MPCM with the classification of the orbital states according to Young tableaux. It was shown that, on the basis of the M1 and the E1 transitions from different states of the p15N scattering to the GS of 16O in the p15N channel, it is quite succeed to explain general behavior of the S-factor in the considered energy range in the presence of two resonances. [ABSTRACT FROM AUTHOR]

In the framework of the modified potential cluster model (PCM), the possibility of describing the available experimental data for the total cross-sections for n11B radiative capture at thermal and astrophysical energies were considered with taking into account the 21 keV and 430 keV resonances. [ABSTRACT FROM AUTHOR]

In the potential cluster model with forbidden states and classification of cluster states according to Young's schemes, the possibility is demonstrated of describing the experimental data for the total cross sections of radiative nLi capture in the energy region from 25 meV to 1.0-1.5 MeV. In the description of the available experimental data it proved to be sufficient to take into account only the Е1 transition from certain scattering states to the ground state and the first excited state of the Li nucleus. [ABSTRACT FROM AUTHOR]