Structure of the prompt neutron multiplicity distribution in the spontaneous fission of $^{256}$Rf

An experimental study of 256 Rf spontaneous fission following the fusion reaction of 50 Ti+ 208 Pb was performed using the velocity filter SHELS of the Flerov laboratory at JINR. The average number of neutrons of ν‾ = 4.30±0.17 and variance of σν2 = 3.2 from the prompt neutron multiplicity distribution were obtained. The alpha decay branching ratio of bα = 0.003 − 0.003 + 0.005 and the half-life of T1 / 2 = ( 6.7±0.2 ) ms of the isotope were determined. For the first time, our neutron detector system allowed us to extend investigation of the prompt neutron multiplicity study to the superheavy element region.