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Information × Registration Number 0224U031725, 0122U001955 , R & D reports Title Comprehensive studies of the properties and mechanisms of interaction of particles with atomic nuclei for fundamental and applied applications popup.stage_title Head Kadenko Ihor M., Доктор фізико-математичних наук Registration Date 07-06-2024 Organization Taras Shevchenko National University of Kyiv popup.description2 The effect of the relaxation of the collective states on the photon strength function (PSF) within the model of two bound pygmy dipole and giant dipole excited stateswas studied. The implementation of various expressions of PSF to the nuclear reaction calculation code EMPIRE was done to determine the effect of PSF sensitivity of nuclear reaction cross sections calculations within the statistical model, as well as calculations of the sensitivities of the cross sections of nuclear reactions with neutrons to the utilized PSF expression and the effect of the pygmy dipole resonance on the calculations of the cross sections of nuclear reactions were evaluated. The mass-energy characteristics of fission fragments in nuclei on the excitation energy were investigated. Within the framework of the proposed nuclear fission model, the calculation of the mass and charge distributions of the fission fragments of the reaction n0.5MeВ+238Pu→239Pu→fission, as well as the total kinetic energy of the fission fragmentsis coincidence with experimental data. The excitation function of the 197Au(n,2n)196gAu reaction is analyzed; the theoretical estimation of the dineutron binding energy was performed. Also: the generalization of the available results of indirect observation of the bound dineutron in (n, 2n) nuclear reactions on 159Tb and 197Au and its properties for the characterization of the dineutron as a unique nucleus with a magic number of 2 is carried out. It is shown that for the final confirmation of the existence of a bound dineutron, it is necessary to observe its decay products and for this purpose the Geant4 model to simulate the decay of bound dineutrons and detect electrons as one of the dineutron decay products was developed. The obtained results demonstrate that a carefully planned experiment can provide a positive result in the observation of a bound dineutron in the energy region of beta particles E= 190-560 keV of the beta spectrum.   Product Description popup.authors Bachynskyi Mykola А. Hohota Olha P. Horbachenko Oleksandr M. Denysov Vitalii Yu. Dzysiuk Nataliia R. Moroziuk Vladyslav Yu. Ostapchuk Oksana A. Pliuiko Volodymyr A. Sakhno Nadiia V. popup.nrat_date 2024-06-07 Close