Neutrons From Spontaneous Fission Of Long-Lived Super- Heavy Nuclei

摘要

The investigations of spontaneous fission of ~(268)Db (Z=105) have been performed. ~(268)Db is the heaviest nuclide for which the average number of neutrons per spontaneous fission =4.2± 1.0 was measured. The search for long-lived isotopes of super-heavy elements in nature is reconsidered. Presently the experiment SHIN in the underground low radioactivity laboratory in Modane (LSM) is going with high efficiency neutron detector to detect rare spontaneous fission events.