Fission barriers and decay channels of superheavy nuclei
Short-lived systems such as superheavy nuclei decay mainly by alpha emission. Fission fragment emission is also probable, as theoretical calculations prove it. Potential barriers and decay channels are studied using a specialized binary macroscopic-microscopic method. The microscopic effects are obtained from the developed binary Strutinsky shell correction method. The main input data are the proton and neutron energy levels calculated with the deformed two-center shell model. One is able in this way to provide the microscopic transition via the level schemes, from the parent to two overlapped and finally separated level schemes. The macrosopic part is acquired by the deformed charged liquid drop model with the double Yukawa-plus-exponential finite range potential. 298Fl dynamics decay is studied by adding the mass inertia tensor. The multidimensional WKB tunneling is used to obtain the penetrabilities and half-lives. Calculations are applied to fission channels around the isotopes of two presumably favored fragments, Pb and Sn. The choice is due to their proton magicity shell correction, as being favorable to fission.
Seminarul este parte a raportului de faza din cadrul proiectului PN 19 06 01 01 / 2019 "Cercetari fundamentale de fizica teoretica prin modele cuantice si metode matematice avansate pentru investigarea structurii si dinamicii sistemelor condensate, nucleare si subnucleare".