摘要 : This study describes an experiment on investigating the properties of spontaneous fission of shortlived neutron-deficient nuclei synthesized in the reaction of complete fusion ~(48)Ca + ~(204)Pb = ~(252)No*. The experiment is perf... 展开 This study describes an experiment on investigating the properties of spontaneous fission of shortlived neutron-deficient nuclei synthesized in the reaction of complete fusion ~(48)Ca + ~(204)Pb = ~(252)No*. The experiment is performed using the SHELS separator and the beam of multicharged ions at U-400 accelerator (LNR, JINR). Two activities undergoing spontaneous fission, which can be related to the ground and isomeric states of ~(250)No nucleus, are registered. The half-lives, total kinetic energies of fission fragments, and neutron multiplicities are measured for the short-lived nuclei. The average number of neutrons per fission for the activity with t_(1/2) = 5.1 ± 0.3 μs is = 4.38 ± 0.13 μs, and for nuclei with the half-life t_(1/2) = 36 ± 3 μs it is v= 3.90 ± 0.20. 收起