Speaker
Description
We investigated some characteristics of the behavior of the rotational bands of even nuclei 250−260No and found that for 252No and 254No arises irregularity. Such irrationality is most likely associated not with a change in deformation, but with the evolution of proton and neutron pairing in these nuclei. The study is based on calculations within the Hartree-Fock-Bogolyubov method and the Quantum-Random-Phase-Approximation method. A representative set of Skyrme forces (SVbas, SkM* and SLy6) was also used. The calculations cover the lower spectrum of continuing isotopes up to 2 MeV. An unusual neutron pairing pattern with a strong shell structure effect: the specific evolution of several sequences of particle-hole (1ph) configurations with increasing number of nucleons. Also in the description of the work, quadrupole and octupole bands are possible, which are in good agreement with experimental data.
