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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13540
Title: Ca 48 + Bk 249 fusion reaction leading to element Z=117: Long-lived α -decaying Db 270 and discovery of Lr 266
Authors: Khuyagbaatar J.
Yakushev A.
Düllmann Ch.E.
Ackermann D.
Andersson L.-L.
Asai M.
Block M.
Boll R.A.
Brand H.
Cox D.M.
Dasgupta M.
Derkx X.
Di Nitto A.
Eberhardt K.
Even J.
Evers M.
Fahlander C.
Forsberg U.
Gates J.M.
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): -
URI: https://doi.org/10.1103/PhysRevLett.112.172501
http://repository.iitr.ac.in/handle/123456789/13540
Issue Date: 2014
Publisher: American Physical Society
ISSN: 319007
Author Scopus IDs: 14826956100
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Author Affiliations: Khuyagbaatar, J., Helmholtz Institute Mainz, 55099 Mainz, Germany, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Yakushev, A., GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Düllmann, 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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