Impact of Tensor Interaction on Beta-Delayed Neutron Emission from Neutron-Rich Nickel Isotopes

摘要

The Skyrme energy density functional including tensor interaction is used to describe microscopically multineutron delayed-neutron emission accompanying beta decay of even-even neutron-rich nickel isotopes of mass number in the range of A = 74-80. The respective calculations are performed in the quasiparticle random-phase approximation with allowance for the two-phonon components of the wave function for states of the daughter nucleus. The properties of the lowest quadrupole excitation of Ni-74,Ni-76,Ni-78,Ni-80 are also studied. It is shown that a decrease in the strength of neutron-proton tensor interaction leads to a substantial hindrance of beta decay and to an increase in the probability for delayedneutron emission.