Structure of the prompt neutron multiplicity distribution in the spontaneous fission of 256Rf

An experimental study of 256Rf spontaneous fission following the fusion reaction of 50Ti+208Pb was performed using the velocity filter SHELS of the Flerov laboratory at JINR. The average number of neutrons of & nu; = 4.30 + 0.17 and variance of & sigma;& nu;2 = 3.2 from the prompt neutron multiplicity distribution were obtained. The alpha decay branching ratio of b & alpha; = 0.003+0.005 -0.003 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.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

Automated summary

An experimental study was conducted to investigate the spontaneous fission of 256Rf following the fusion reaction of 50Ti+208Pb using the velocity filter SHELS at the Flerov laboratory, JINR. The study obtained the average neutron number of & nu; = 4.30 + 0.17 and the variance of & sigma;& nu;2 = 3.2 from the prompt neutron multiplicity distribution. The study also determined the alpha decay branching ratio of b & alpha; = 0.003+0.005 -0.003 and the half-life of T1/2 = (6.7 + 0.2) ms of the isotope. For the first time, the neutron detector system enabled the investigation of prompt neutron multiplicity in the superheavy element region.