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Summary decay properties of the isotopes of even-Z elements observed among the products of 48 Ca beam and 238 U, 242,244 Pu, 245,248 

Summary decay properties of the isotopes of even-Z elements observed among the products of 48 Ca beam and 238 U, 242,244 Pu, 245,248 

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A review of the discovery and investigation of the 'island of stability' of super-heavy nuclei at the separator DGFRS (FLNR, JINR) in the fusion reactions of (48)Ca projectiles with target nuclei (238)U-(249)Cf is presented. The synthesis of the heaviest nuclei, their decay properties, and methods of identification are discussed. The role of shell...

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... this method, one and the same nucleus can be observed either as the prod- uct of evaporation of a different number of neutrons from CN produced in the reactions with different target isotopes or as α-decay product of parent nuclide synthesized in the reaction with a heavier target nucleus (with higher Z). As an example, figure 6 shows cross reactions used in experiments on the synthesis of Fl and Lv. Finally, the α decay properties and SF half-lives of synthesized nuclei can evidently demon- strate their origin. ...
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... identical decay chains were observed. Each consisted of two consecutive α decays terminated by SF of the third nucleus (see figure 6). In this experiment, carried out at the lowest projectile energy only, the parent nucleus was assigned to 288 Fl [39]. ...
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... Cm (percentage of 3.1%) (private communica- tion by Hofmann). Indeed, α-particle energies and lifetimes of the second to fourth detected nuclei coincide well with data for 287 Fl, 279 Ds and 275 Hs as well as decay time of SF nucleus is in agreement with half-life for 271 Sg (see figure 6). Somewhat lower α-particle energy for the parent even-odd 291 Lv and miss- ing of one of five decays ( 283 Cn) are quite possible. ...
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... more decay chains of 294 118 were observed in 2005 at higher projectile energy [45]. Finally, the fourth decay chain of the same isotope was registered during two experi- ments aimed at the synthesis of element 117 in the 249 282 Cn [44] (see figure 6). Among the daughter nuclei in the decay chain of 294 118, decay properties of two isotopes 286 Fl and 282 Cn were confirmed in independent experiments at the BGS [52,53] (see subsection 4.1.1. ...
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... energies of α particles for even-Z nuclei 281 Cn, 294 118, 291 Lv, 292 Lv, 293 Lv and their descendants registered by the focal-plane detector only or together with the side one at the DGFRS [39][40][41][42][43][44][45] are shown in figure 11. Here we also show results of experiments carried out with the use of other facilities (see figure 6): chemical setup IVO + COLD [46][47][48][49] and separators SHIP [50,51], BGS [52,53] and TASCA [32,54]. ...
Context 6
... 16 of the 54 synthesized nuclei SF was observed. For seven even-Z nuclei SF is the predominant mode of decay (see figure 6 and table 1). In five nuclei, SF competes with α decay. ...

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