|Title:||Ca 48 + Bk 249 fusion reaction leading to element Z=117: Long-lived Î± -decaying Db 270 and discovery of Lr 266|
Di Nitto A.
|Published in:||Physical Review Letters|
|Abstract:||The superheavy element with atomic number Z=117 was produced as an evaporation residue in the Ca48+Bk249 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 117294 and its decay products. A hitherto unknown α-decay branch in Db270 (Z=105) was observed, which populated the new isotope Lr266 (Z=103). The identification of the long-lived (T1/2=1.0-0.4+1.9h) α-emitter Db270 marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an "island of stability." © 2014 American Physical Society.|
|Citation:||Physical Review Letters (2014), 112(17): -|
|Publisher:||American Physical Society|
|Author Scopus IDs:||14826956100|
|Author Affiliations:||Khuyagbaatar, J., Helmholtz Institute Mainz, 55099 Mainz, Germany, GSI Helmholtzzentrum fÃ¼r Schwerionenforschung, 64291 Darmstadt, Germany|
Yakushev, A., GSI Helmholtzzentrum fÃ¼r Schwerionenforschung, 64291 Darmstadt, Germany
DÃ¼llmann, Ch.E., Helmho
|Corresponding Author:||Khuyagbaatar, J.; Helmholtz Institute Mainz, 55099 Mainz, Germany; email: J.Khuyagbaatar@gsi.de|
|Appears in Collections:||Journal Publications [PH]|
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