Fusion reaction 48Ca + 249Bk leading to formation of the element Ts (Z=117)

Research output: Contribution to journalArticle


The heaviest currently known nuclei, which have up to 118 protons, have been produced in 48Ca induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing 48Ca with the radioactive target 249Bk, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of 294Ts. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to 293Ts. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.


  • J. Khuyagbaatar
  • A. Yakushev
  • Ch E. Düllmann
  • D. Ackermann
  • L. L. Andersson
  • M. Asai
  • M. Block
  • R. A. Boll
  • H. Brand
  • M. Dasgupta
  • X. Derkx
  • A. Di Nitto
  • K. Eberhardt
  • J. Even
  • M. Evers
  • J. M. Gates
  • N. Gharibyan
  • K. E. Gregorich
  • J. H. Hamilton
  • W. Hartmann
  • R. D. Herzberg
  • F. P. Heßberger
  • D. J. Hinde
  • J. Hoffmann
  • R. Hollinger
  • A. Hübner
  • E. Jäger
  • B. Kindler
  • J. V. Kratz
  • J. Krier
  • N. Kurz
  • M. Laatiaoui
  • S. Lahiri
  • R. Lang
  • B. Lommel
  • M. Maiti
  • K. Miernik
  • S. Minami
  • A. Mistry
  • C. Mokry
  • H. Nitsche
  • J. P. Omtvedt
  • G. K. Pang
  • P. Papadakis
  • D. Renisch
  • J. Roberto
  • J. Runke
  • K. P. Rykaczewski
  • M. Schädel
  • B. Schausten
  • A. Semchenkov
  • D. A. Shaughnessy
  • P. Steinegger
  • J. Steiner
  • E. E. Tereshatov
  • P. Thörle-Pospiech
  • K. Tinschert
  • T. Torres De Heidenreich
  • N. Trautmann
  • A. Türler
  • J. Uusitalo
  • D. E. Ward
  • M. Wegrzecki
  • N. Wiehl
  • S. M. Van Cleve
  • V. Yakusheva
External organisations
  • Helmholtz Institute Mainz
  • GSI Helmholtz Centre for Heavy Ion Research
  • University of Mainz
  • N2P3 Institut National de Physique Nucleaire et de Physique des Particules
  • Japan Atomic Energy Agency
  • Oak Ridge National Laboratory
  • University of Liverpool
  • Australian National University
  • University of Groningen
  • Lawrence Berkeley National Laboratory
  • Lawrence Livermore National Laboratory
  • Vanderbilt University
  • Saha Institute of Nuclear Physics
  • Indian Institute of Technology, Roorkee
  • Texas A and M University
  • University of Oslo
  • University of Jyväskylä
  • Paul Scherrer Institute
  • University of Bern
  • Institute of Electron Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics


  • superheavy elements, element 117 (Ts), alpha decay, gas-filled separator
Original languageEnglish
Article number054306
Number of pages16
JournalPhysical Review C
Issue number5
Publication statusPublished - 2019 May 7
Publication categoryResearch

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Related research output

Ulrika Forsberg, Claes Fahlander & Dirk Rudolph, 2016 Dec 1, Nobel Symposium NS 160 – Chemistry and Physics of Heavy and Superheavy Elements: EPJ Web of Conferences. Rudolph, D. (ed.). EDP Sciences, Vol. 131. 7 p. 02003

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

U. Forsberg, D. Rudolph, C. Fahlander, P. Golubev, L.G. Sarmiento, S. Åberg, Block, M., Düllmann, C. E., Heßberger, F. P., Kratz, J. V. & Yakushev, A., 2016 Sep 10, In : Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. 760, p. 293-296 4 p.

Research output: Contribution to journalArticle

Khuyagbaatar, J., Yakushev, A., Düllmann, C. 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., Gharibyan, N. & 52 othersPavel Golubev, 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, P., Renisch, D., Roberto, J., Dirk Rudolph, Runke, J., Rykaczewski, K. P., Luis Sarmiento, Schädel, M., Schausten, B., Semchenkov, A., Shaughnessy, D. A., Steinegger, P., Steiner, J., Tereshatov, E. E., Thörle-Pospiech, P., Tinschert, K., Torres De Heidenreich, T., Trautmann, N., Türler, A., Uusitalo, J., Ward, D. E., Wegrzecki, M., Wiehl, N., Van Cleve, S. M. & Yakusheva, V., 2014, In : Physical Review Letters. 112, 17, 4 p., 172501.

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