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1.	Khuyagbaatar, J., et al. (author) 48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr 2014 In: Physical Review Letters. - 1079-7114. ; 112:17 Journal article (peer-reviewed)abstract The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk 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 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-lived (T1/2=1.0+1.9−0.4 h) α-emitter 270Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an “island of stability.”
2.	Khuyagbaatar, J., et al. (author) Study of the 48Ca + 249Bk Fusion Reaction Leading to Element Z = 117: Long-lived Alpha-decaying 270Db and Discovery of 266Lr 2014 In: GSI Report. ; 2014-1, s. 125-125 Book chapter (peer-reviewed)
3.	Forsberg, Ulrika, et al. (author) Spectroscopic Tools Applied to Element Z = 115 Decay Chains 2014 In: EPJ Web of Conferences. - : EDP Sciences. - 2100-014X .- 2101-6275. - 9782759811755 - 9782759811762 ; 66, s. 02036-02036 Conference paper (peer-reviewed)abstract Nuclides that are considered to be isotopes of element Z = 115 were produced in the reaction 48Ca + 243Am at the GSI Helmholtzzentrum für Schwerionenforschung Darmstadt. The detector setup TASISpec was used. It was mounted behind the gas-filled separator TASCA. Thirty correlated α-decay chains were found, and the energies of the particles were determined with high precision. Two important spectroscopic aspects of the offline data analysis are discussed in detail: the handling of digitized preamplified signals from the silicon strip detectors, and the energy reconstruction of particles escaping to upstream detectors relying on pixel-by-pixel dead-layer thicknesses.

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Type of publication: conference paper (1); journal article (1); book chapter (1)

Type of content: peer-reviewed (3)

Author/Editor: Kurz, N (3); Golubev, Pavel (3); Papadakis, P. (3); Rudolph, Dirk (3); Kratz, J. V. (3); Sarmiento, Luis (3); show more...; Fahlander, Claes (3); Andersson, L-L (3); Herzberg, R-D (3); Ackermann, D. (3); Eberhardt, K. (3); Even, J. (3); Khuyagbaatar, J. (3); Krier, J. (3); Schausten, B. (3); Yakushev, A. (3); Lommel, B. (3); Kindler, B. (3); Nitsche, H. (3); Brand, H (3); Di Nitto, A. (3); Block, M (3); Mistry, A. (3); Forsberg, Ulrika (3); Gates, J.M. (3); Jäger, E. (3); Mokry, C. (3); Runke, J. (3); Thörle-Pospiech, P. (3); Trautmann, N. (3); Schädel, M. (3); Derkx, X. (3); Asai, M. (2); Dasgupta, M. (2); Lang, R (2); Hartmann, W (2); Cox, D. M. (2); Uusitalo, J. (2); Hoffmann, J (2); Lahiri, S (2); Semchenkov, A. (2); Steiner, J. (2); Heßberger, F. P. (2); Renisch, D. (2); Minami, S (2); Maiti, M. (2); Tinschert, K. (2); Düllmann, Ch.E. (2); Shaughnessy, D. A. (2); Hübner, A. (2); show less...

University: Lund University (3)

Language: English (3)

Research subject (UKÄ/SCB): Natural sciences (3)

Year: 2014 (3)Undo refine

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