Khuyagbaatar, J, Yakushev, A, Duellmann, Ch E, Ackermann, D, Andersson, L-L, Asai, M, Block, M, Boll, RA, Brand, H, Cox, DM et al (show 62 more authors)
(2014)
⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr.
Physical Review Letters, 112 (17).
172501-.
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Abstract
The superheavy element with atomic number Z=117 was produced as an evaporation residue in the (48)Ca+(249)Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope (294)117 and its decay products. A hitherto unknown α-decay branch in (270)Db (Z = 105) was observed, which populated the new isotope (266)Lr (Z = 103). The identification of the long-lived (T(1/2) = 1.0(-0.4)(+1.9) h) α-emitter (270)Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an "island of stability."
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 5106 Nuclear and Plasma Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 21 Apr 2017 13:16 |
| Last Modified: | 21 Jun 2024 03:36 |
| DOI: | 10.1103/PhysRevLett.112.172501 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3007066 |
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