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Ca-48+Bk-249 Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying (270)Db and Discovery of Lr-266

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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., Nitto, A. D., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J.M., . . . Yakusheva, V. (2014). Ca-48+Bk-249 Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying (270)Db and Discovery of Lr-266. Physical Review Letters, 112(17), Article 172501. https://doi.org/10.1103/PhysRevLett.112.172501
Published in
Physical Review Letters
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. |
Nitto, A. Di |
Eberhardt, K. |
Even, J. |
Evers, M. |
Fahlander, C. |
Forsberg, U. |
Gates, J.M. |
Gharibyan, N. |
Golubev, P. |
Gregorich, K.E. |
Hamilton, J.H. |
Hartmann, W. |
Herzberg, R.-D. |
Hessberger, F.P. |
Hinde, D.J. |
Hoffmann, J. |
Hollinger, R. |
Hübner, A. |
Jäger, E. |
Kindler, B. |
Kratz, J.V. |
Krier, J. |
Kurz, N. |
Laatiaoui, M. |
Lahiri, S. |
Lang, R. |
Lommel, B. |
Maiti, M. |
Miernik, K. |
Minami, S. |
Mistry, A. |
Mokry, C. |
Nitsche, H. |
Omtvedt, J.P. |
Pang, G.K. |
Papadakis, Philippos |
Renisch, D. |
Roberto, J. |
Rudolph, D. |
Runke, J. |
Rykaczewski, K.P. |
Sarmiento, L.G. |
Schädel, M. |
Schausten, B. |
Semchenkov, A. |
Shaughnessy, D.A. |
Steinegger, P. |
Steiner, J. |
Tereshatov, E.E. |
Thörle-Pospiech, P. |
Tinschert, K. |
De Heidenreich, T. Torres |
Trautmann, N. |
Türler, A. |
Uusitalo, Juha |
Ward, D.E. |
Wegrzecki, M. |
Wiehl, N. |
Cleve, S.M. Van |
Yakusheva, V.
Date
2014
Discipline
FysiikkaKiihdytinlaboratorioPhysicsAccelerator Laboratory
Copyright
© 2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.

 
[Introduction] The superheavy element with atomic number Z ¼ 117 was produced as an evaporation residue in the 48 Ca þ 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- μ s 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 ¼ 105 ) was observed, which populated the new isotope 266 Lr ( Z ¼ 103 ). The identification of the long-lived ( T 1 = 2 ¼ 1 . 0 þ 1 . 9 − 0 . 4 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. ”
Publisher
American Physical Society
ISSN Search the Publication Forum
0031-9007
Keywords
heaviest elements ca-48-inducted reactions superheavy nuclei tasca separator gsi
DOI
https://doi.org/10.1103/PhysRevLett.112.172501
URI

http://urn.fi/URN:NBN:fi:jyu-201408272667

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/23722692

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  • Matemaattis-luonnontieteellinen tiedekunta [5066]
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