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Information × Registration Number 0217U000600, 0112U004425 , R & D reports Title Studies of collective motion in atomic nuclei, nuclear decay and nuclear collisions near the barrier in the framework of semiclassical approximation. popup.stage_title Head Denisov Vitaly, Registration Date 15-02-2017 Organization Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine popup.description2 On this stage the offered the multidimensional cluster-preformation model for cluster decays is investigated. The macroscopic potential-energy surface related to the interaction between the cluster and the residue nucleus is evaluated in the framework of the nonlocal ?4 extended Thomas-Fermi approach with Skyrme and Coulomb forces. The shell correction to the macroscopic potential energy is also taken into account. The dynamical surface deformations of both the cluster and the residue nucleus are taken into consideration at the barrier penetration path. The heights of saddle points related to deformed nuclear shapes are lower than the barrier height between the spherical cluster and residue nuclei; therefore the dynamical deformations of nuclei increase the barrier penetrability and reduce the half-life of cluster decay. The shell-correction contribution into the potential energy between cluster and residue nucleus is important for both the potential landscape and the half-life evaluation. The experimental values of cluster-decay half-lives for 228Th ? 208Pb + 20О, 232U ? 208Pb + 24Ne, 236Pu ? 208Pb + 28Mg and 242Cm ? 208Pb + 34Si are well reproduced in the model. Therefore, the dynamical deformations of nuclei increase the barrier penetrability and reduce the half-life value. The influence of dynamical deformations of nuclear shape around th barrier is very important for an accurate description of cluster emission half-life. The ground-state deformation of cluster strongly influences the trajectory of cluster emission during cluster decay. Product Description popup.authors Абросімов Валерій Іванович Давидовська Оксана Іванівна Денисов Віталій Юрійович Левон Олександр Іванович Маргітич Тетяна Олегівна Нестеров Василь Олександрович Пилипенко Микола Олександрович Худенко Олександра Олександрівна popup.nrat_date 2020-04-02 Close