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

  title={Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)},
  author={Jadambaa Khuyagbaatar and A. Yakushev and Christoph E D{\"u}llmann and Dieter Ackermann and L-L. Andersson and Masato Asai and Michael Block and Rose A. Boll and Holger Brand and Daniel Cox and Mahananda Dasgupta and X. Derkx and Antonio Di Nitto and Klaus Eberhardt and Julia Even and Maurits Evers and C. Fahlander and U. Forsberg and Jacklyn M. Gates and Narek Gharibyan and Pavel Golubev and Kenneth E. Gregorich and J. H. Hamilton and Willi Hartmann and R-D. Herzberg and Fritz Peter Hessberger and D. J. Hinde and Jan Hoffmann and Ralph Hollinger and Annett H{\"u}bner and Egon J{\"a}ger and Birgit Kindler and Jens Volker Kratz and J{\"o}rg Krier and Nikolaus Kurz and Mustapha Laatiaoui and Susanta Lahiri and R. Lang and B. Lommel and Moumita Maiti and K Miernik and Shizu Minami and Andrew Kishor Mistry and Ch. Mokry and Heino Nitsche and Jon Petter Omtvedt and Gregory K. Pang and Philippos E. Papadakis and D Renisch and James B. Roberto and D. Rudolph and J{\"o}rg Runke and Krzysztof Piotr Rykaczewski and L. G. Sarmiento and Matthias Sch{\"a}del and B. Schausten and A. G. Semchenkov and Dawn A. Shaughnessy and Patrick Steinegger and Jutta Steiner and Evgeny E. Tereshatov and Petra Th{\"o}rle-Pospiech and Klaus Tinschert and T. Torres de Heidenreich and Norbert Trautmann and Andreas T{\"u}rler and Juha Uusitalo and David Ward and Maciej Węgrzecki and Norbert Wiehl and Shelley M. Van Cleve and Vera Yakusheva},
  journal={Physical Review C},
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… Expand
9 Citations
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Synthesizing and Studying Superheavy Nuclei 294Ts and 294Og
Experimental works performed on the Dubna gas-filled magnetic recoil separator (GFS) to study the reactions of formation of $^{294}$Ts and $^{294}$Og nuclides and the properties of their radioactiveExpand
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Search for Electron-Capture Delayed Fission in the New Isotope ^{244}Md.
The electron-capture decay followed by a prompt fission process was searched for in the hitherto unknown most neutron-deficient Md isotope with mass number 244, and the origin of eight fission events resulting in a half-life of 5_{-2}^{+3}  ms could not be unambiguously identified within the present data. Expand
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Isomeric states in Rf256


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The synthesis of element 116 in fusion-evaporation reactions of a 48Ca beam with radioactive 248Cm targets was studied at the velocity filter SHIP of GSI in Darmstadt. At excitation energies of theExpand
Study of the reaction 48Ca + 248Cm → 296Lv∗ at RIKEN-GARIS
The fusion reaction 48Ca + 248Cm → 296Lv* was investigated using the gas-filled recoil ion separator GARIS at RIKEN. The reaction was studied at excitation energies of 41.3 and 38.2 MeV. A total ofExpand
Study of non-fusion products in the Ti50+Cf249 reaction
The isotopic distribution of nuclei produced in the 50Ti + 249Cf reaction has been studied at the gas-filled recoil separator TASCA at GSI Darmstadt, which separates ions according to differences inExpand
ERRATUM: The cross sections of fusion-evaporation reactions: the most promising route to superheavy elements beyond Z=118
The synthesis of superheavy elements beyond oganesson (Og), which has atomic number Z = 118, is currently one of the main topics in nuclear physics. An absence of sufficient amounts of targetExpand
Production and decay of element 114: high cross sections and the new nucleus 277Hs.
The fusion-evaporation reaction 244Pu(48Ca,3-4n){288,289}114 was studied at the new gas-filled recoil separator TASCA and a previously unobserved α branch in 281Ds was observed (probability to be of random origin from background: 0.1%). Expand
First Superheavy Element Experiments at the GSI Recoil Separator TASCA: The Production and Decay of Element 114 in the 244Pu(48Ca,3-4n) Reaction
Experiments with the new recoil separator, Transactinide Separator and Chemistry Apparatus (TASCA), at the GSI were performed by using beams of Ca-48 to irradiate targets of Pb206-208, which led toExpand
Towards saturation of the electron-capture delayed fission probability: The new isotopes 240Es and 236Bk
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Eleven new heaviest isotopes of elements Z=105 to Z=117 identified among the products of 249Bk+48Ca reactions
The heaviest isotopes of elements Z = 117 to Z = 105, 294117, 293117, 290115, 289115, 286113, 285113, 282Rg, 281Rg, 278Mt, 274Bh, and 270Db, were identified by means of the Dubna gas-filled recoilExpand
Recoil-α-fission and recoil-α–α-fission events observed in the reaction $^{48}Ca + ^{243}Am$
Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\"ur Schwerionenforschung. Amongst theExpand
Independent Verification of Element 114 Production in the Ca-48 + Pu-242 Reaction
Independent verification of the production of element 114 in the reaction of 244-MeV {sup 48}Ca with {sup 242}Pu is presented. Two chains of time- and position-correlated decays have been assigned toExpand