Journal
PHYSICAL REVIEW C
Volume 83, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.83.054315
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Funding
- Russian Federal Agency of Atomic Energy (RFBR) [07-02-00029, 09-02-12060, 09-03-12214]
- DOE Office of Nuclear Physics, Office of Basic Energy Sciences
- DOE [09-040, DE-AC05-00OR22725, 08-ERD-030, DE-AC52-07NA27344]
- UT-Battelle, LLC.
- Lawrence Livermore National Security, LLC.
- US DOE [DE-FG-05-88ER40407, DE-FG07-01AL67358]
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The heaviest isotopes of elements Z = 117 to Z = 105, (294)117, (293)117, (290)115, (289)115, (286)113, (285)113, (282)Rg, (281)Rg, (278)Mt, (274)Bh, and (270)Db, were identified by means of the Dubna gas-filled recoil separator among the products of the Bk-249 + Ca-48 reaction. The details of the observed six decay chains, indicating the production and decay of isotopes (293)117 and (294)117, are presented and discussed. The decay energies and resulting half-lives of these new nuclei show a strong rise of stability with increasing neutron number, validating the concept of the island of enhanced stability for superheavy nuclei [Oganessian et al., Phys. Rev. Lett. 104, 142502 (2010)].
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