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Diffuse relaxation approximation in a heated Fermi system
S. V. Lukyanov
An expression for the two-particle relaxation time of collective excitations on a distorted Fermi surface in the diffusion approach to kinetic theory is obtained. The general case…
Influence of surface effects on neutron skin in atomic nuclei
S. V. Lukyanov, A. I. Sanzhur
The influence of the diffuse surface layer of a finite nucleus on the mean square radii and their isotopic shift is investigated. We present the calculations within the Gibbs-Tolma…
Neutron skin and halo in medium and heavy nuclei within the extended Thomas-Fermi theory
S. V. Lukyanov, A. I. Sanzhur
The neutron skin and halo distributions in medium and heavy nuclei are calculated within the extended Thomas-Fermi approximation. Calculations are carried out for the effective Sky…
Diffuse approximation to the kinetic theory in a Fermi system
V. M. Kolomietz, S. V. Lukyanov
We suggest the diffuse approach to the relaxation processes within the kinetic theory for the Wigner distribution function. The diffusion and drift coefficients are evaluated takin…
Diffusion on the Distorted Fermi Surface
V. M. Kolomietz, S. V. Lukyanov
The diffusion approximation to the relaxation on the distorted Fermi surface in a Fermi liquid is considered. The dependence of the relaxation time on the multipolarity of a Fermi…
Nucleon distribution in nuclei beyond β-stability line
V. M. Kolomietz, S. V. Lukyanov, A. I. Sanzhur
The radii of nucleon distribution, bulk density, and neutron skin in nuclei beyond the β-stability line are studied within the direct variational method. We evaluate the partial eq…
Curved and diffuse interface effects on the nuclear surface tension
V. M. Kolomietz, S. V. Lukyanov, A. I. Sanzhur
We redefine the surface tension coefficient for a nuclear Fermi-liquid drop with a finite diffuse layer. Following Gibbs-Tolman concept, we introduce the equimolar radius R_e of sh…
Giant neutron halo in nuclei beyond beta-stability line
V. M. Kolomietz, S. V. Lukyanov, A. I. Sanzhur
The radii of nucleon distribution and neutron skin in nuclei beyond the β-stability line are studied within the extended Thomas-Fermi approximation. We show that the growth of neut…
Isovector response and energy-weighted sums in hot nuclei
V. M. Kolomietz, S. V. Lukyanov, O. I. Davidovskaya
We investigate the collective response function and the energy-weighted sums (EWS) for isovector mode in hot nuclei. The approach is based on the collisional kinetic theory a…
Isovector energy-weighted sums for hot nuclei in presence of relaxation processes
V. M. Kolomietz, S. V. Lukyanov, O. I. Davidovskaya
We investigate the collective response function and the energy-weighted sums m_k for isovector mode in hot nuclei. The approach is based on the collisional kinetic theory and takes…
A dependence of the enhancement factor in energy-weighted sums for isovector giant resonances
V. M. Kolomietz, S. V. Lukyanov
We consider the energy weighted sums (EWS) for isovector giant dipole resonances (IVGDR) in finite nuclei within Landau kinetic theory. The dependence of both IVGDR energy, $E_{IVG…
Energy weighted sums for collective excitations in nuclear Fermi-liquid
V. M. Kolomietz, S. V. Lukyanov, O. O. Khudenko
Model independent, , adiabatic, , and high-energy, , energy weighted sums for the isoscalar and isovector nuclear excitations are investigated within the framewor…
Shape fluctuations in a Fermi system with nonlinear dissipativity
V. M. Kolomietz, S. V. Lukyanov, S. Shlomo
The contribution of thermal fluctuations to the widths of isoscalar giant multipole resonances (GMR) in heated nuclei is studied. Starting from the collisional kinetic equation, it…
Kinetic energy and spin-orbit splitting in nuclei near neutron drip line
I. Hamamoto, S. V. Lukyanov, X. Z. Zhang
Two important ingredients of nuclear shell-structure, kinetic energy and spin-orbit splitting, are studied as a function of orbital angular momenta \ell and binding energies, when…
Collisional relaxation of collective motion in a finite Fermi liquid
V. M. Kolomietz, S. V. Lukyanov, V. A. Plujko +1
Finite size effects in the equilibrium phase space density distribution function are taken into account for alculations of the relaxation of collective motion in finite nuclei. Mem…