arXiv subjects

O. V. Bespalova

Publications and source records attributed to O. V. Bespalova.

3 recordsLinked to original sources

arXiv2025

Determination of Asymptotic Normalization Coefficients Based on the Dispersive Optical Model

A method for determining asymptotic normalization coefficients for removing nucleons from nuclei is proposed. It is based on the use of the dispersive optical model potential. Within the method, the strength parameter of the Hartree- Fock type potential at the Fermi energy is the only one fitting parameter. It was found that adjusting this parameter allows us to achieve a coincidence of the calculated binding energies with the experimental ones accurately enough. Specific calculations were carried out for 17O, 17F, 41Ca, and 41Sc nuclei. An acceptable agreement with the results of other works, which are characterized by a noticeable spread, was achieved.

nucl-th↗

arXiv2019

Single-particle structure of the N = 20 and N = 28 isotones within the dispersive optical model

The neutron single-particle characteristics of the N = 20, 28 isotones at 8 < Z < 30 was calculated within the dispersive optical model. The global parameters of the spin-orbit and imaginary parts of the potential as well as surface absorption independent on neutron-proton asymmetry and increased diffuseness at large neutron excess were used in the calculations. The suitability of the global parameters to predict the evolution of the neutron single-particle structure of nuclei near the neutron drip line was investigated. The following results are in agreement with the available experimental data: the reduction of the particle-hole energy gaps, the degeneration of the 1f7/2 and 2p states and then a change in the 1f7/2 , 2p3/2 level sequence and more rapid reduction of the 2p-splitting in comparison with the 1f-splitting with decreasing Z. The predictive power of the dispersive optical model with respect to neutron-rich nuclei is demonstrated.

nucl-th↗

arXiv2003

Nucleon-nucleus real potential of Woods-Saxon shape between -60 and +60 MeV for the 40<A<208 nuclei

The nucleon differential elastic scattering cross sections, the total proton reaction cross sections, and the single-particle energies of nucleon bound states for 40Ca, 90Zr and 208Pb are reanalyzed in terms of the dispersive optical model at energy ranging from -75 MeV to +60 MeV. The resultant real effective Woods-Saxon potential, which corresponds to the dispersive optical model potential, is studied as dependent on A, Z, and E and on projectile type (proton or neutron). For the first time, a parameterization of the Woods-Saxon real part of the nucleon-nucleus potential is proposed for the 40<A<208 nuclei at energy ranging from -60 MeV to +60 MeV, including a range near the Fermi energy. The parameterization reflects the dispersion relation between the real and imaginary parts of the optical model potential through the energy dependence of the radius parameter of the real part of the potential. The method to determine the imaginary part of the optical model potential, which is symmetrical relative to the Fermi energy, is also proposed for the 40<A<208 nuclei. The differential elastic scattering cross sections, the total interaction cross sections, the total proton reaction cross sections, and the single-particle energies of the nucleon bound states calculated in terms of the proposed nucleon-nucleus potential parameterization for some of the n,p+A (40<A<208) systems are compared with the available experimental data, yielding a fairly good agreement.

nucl-th↗