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Information × Registration Number 0212U006269, 0106U007888 , R & D reports Title Structure characteristics of the few-nucleon and multi-cluster nuclear systems, and near-threshold phenomena popup.stage_title Head Simenog Ivan Vasylyovych, Registration Date 12-03-2012 Organization Bogolyubov Institute for Theoretical Physics of National Academy of Sciences of Ukraine popup.description2 Within the theory of quantum systems of particles, the general diagrams of stability of three-particle systems are obtained depending on the ratio of masses of particles and on the intensities of interactions. A number of new universal effects are discovered such as "traps" effects, the levels "rearrangement" effects and others. It is established that the Efimov effect is present only within the area of the diagram of stability where all of the three pairs of particles interactions are resonant. For the interaction potentials in the form of delta-functions, it is proved that the repulsive delta-interaction does not shift the energy spectra and does not make any influence on scattering. New nucleon-nucleon potentials are proposed, and a concordant description of all the main few-nucleon characteristics is given. Specific structure characteristics of the three- and four-clucter nuclei are found using the proposed models of interaction between clusters. All the main structure functions of these nuclei are studied systematically, and their form factors and momentum distributions are predicted. For the three-particle Coulomb systems, complete diagrams of stability and the energy spectra are found for a number of realistic small atomic and molecular systems. Powerful optimization schemes for variational methods are created for studying the quantum systems of a few particles with high and controlled accuracy. The generalized commutation relations are introduced for the operators of the coordinate and momentum of different particles, and corresponding wave equations are formulated. A hybrid method with the use of complex scaling is proposed in the theory of the nuclear systems scattering. The optical model is developed for the scattering of the carbon isotopes by the oxygen nuclei at various energies. Relativistic corrections are obtained for the system of two particles with Coulomb interaction. Product Description popup.authors Бідасюк Юрій Михайлович Гринюк Борис Євгенович Кузьменко Микола Васильович Михнюк Володимир Валерійович П'ятницький Дмитро Валерійович Сименог Іван Васильович Туровський Олексій Іванович Шаульський Андрій Володимирович Шевченко Андрій Юрійович popup.nrat_date 2020-04-02 Close