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Registration Number

0225U004207, (0120U102221) , R & D reports

Title

Quantum and semi-classical aspects of collective processes in heavy atomic nuclei

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Дослідження ефектів вихрового руху нуклонів в кінетичних властивостях (масовий параметр, коефіцієнт тертя) колективного ядерного руху з використанням напівкласичної функції відгуку густини нуклонів. Обчислення розподілу густини атомних електронів в рамках статистичного наближення Томаса-Фермі.

Head

Ivanyuk Fedir O., Доктор фізико-математичних наук

Registration Date

26-11-2025

Organization

Institute of Nuclear Research of the National Academy of Sciences of Ukraine

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The development of quantum Langevin approach for the investigation of the structure and rearrangement of atomic nuclei in complicated processes, in particular, in the process of sub-barrier fission of heavy nuclei.

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To describe the process of nuclear fission, the non-Markovian Langevin equation is substantiated, which does not require additional assumptions regarding the characteristic times of change of the collective and internal subsystems of the fissile nucleus. A method is proposed for calculating the energies of electronic levels for multi-electron atoms. In addition to the Coulomb field of the nucleus, the interaction between electrons is taken into account. This interaction is taken into account approximately using perturbation theory within the framework of the Thomas-Fermi model. The nature of the new isoscalar octupole resonance found within the framework of the kinetic model based on the Vlasov equation for finite Fermi systems with a moving surface is investigated. It is shown that this octupole resonance is due to dynamic effects of the nuclear surface, similar to the low-energy isoscalar dipole resonance (vortex dipole mode) observed in heavy nuclei. It is found that the velocity field associated with the new octupole resonance has a vortex character in the region of the nuclear surface. A generalized diffraction approach to reactions of the H(d,p)X type is considered, which takes into account the influence of the longitudinal component of the transferred momentum and the transverse relative momentum. The main attention is paid to the analysis of the deuteron structure, the influence of its internal dynamics, as well as the study of kinematic effects that can be interpreted as a manifestation of the quark substructure of nucleons

Product Description

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Kryvenko-Emetov Yaroslav D.
Oleksandr H. Magner
Serhii M. Fedotkin
Valerii I. Abrosimov
Andrii I. Sanzhur
Serhii V. Radionov
Serhii V. Luk'ianov
Dmytro V. Horpynchenko
Ustym V. Hryhor'iev

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2025-11-26