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Information × Registration Number 0225U004147, (0120U102221) , R & D reports Title Quantum and semi-classical aspects of collective processes in heavy atomic nuclei popup.stage_title Формулювання квантових рівняння Ланжевена з реалістичними параметрами (параметризація форми ядра, оболонкові ефекти та сили спарювання в енергії деформації, квантові ефекти в тензорах інерції, тертя та дифузії) для опису процесу поділу важких ядер. Head Ivanyuk Fedir O., Доктор фізико-математичних наук Registration Date 19-11-2025 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description1 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. popup.description2 Within the framework of the five-dimensional Langevin approach, used to describe the process of nuclear fission, the mass distributions of the fission fragments of thorium isotopes were calculated. The transition from mass-symmetric to mass-asymmetric fission through a three-hump distribution is well reproduced. An analytical expression for the density of levels as a function of the excitation energy is derived within the framework of the micro-macroscopic approach in the quasiclassical approximation of the theory of periodic orbits. It is shown that the expression for the density of levels has correct asymptotes at large (Fermi gas) and small (combinatorial formula) excitation energies. The influence of surface oscillations on iso-scalar dipole excitations for finite Fermi systems was investigated. It was established that the formation of both low-energy dipole resonance (vortex mode) and high-energy resonance (compression mode) is mainly determined by the dynamic surface effects. Product Description popup.authors Gorpinchenko Dmytro V. Санжур Андрій Ігорович Abrosimov Valery I Magner Oleksandr H Ustym V. Hryhor'iev Yaroslav D. Kryvenko-Yemetov Serhii V. Luk'ianov Serhii V. Radionov Serhii M. Fedotkin popup.nrat_date 2025-11-19 Close