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Recoil-α-fission and recoil-α–α-fission events observed in the reaction 48Ca + 243Am

Journal Article · · Nuclear Physics. A
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  1. Lund Univ. (Sweden); Michigan State University
  2. Lund Univ. (Sweden)
  3. Helmholtz Inst. Mainz (Germany)
  4. Johannes Gutenberg Univ., Mainz (Germany)
  5. Helmholtz Inst. Mainz (Germany); Johannes Gutenberg Univ., Mainz (Germany); GSI Helmholtz Centre for Heavy Ion Research GmbH, Darmstadt (Germany)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Univ. of Liverpool, Liverpool (United Kingdom)
  9. Helmholtz Inst. Mainz (Germany); GSI Helmholtz Centre for Heavy Ion Research GmbH, Darmstadt (Germany)
  10. Helmholtz Institute Mainz, Mainz (Germany)
  11. GSI Helmholtz Centre for Heavy Ion Research GmbH, Darmstadt (Germany); Japan Atomic Energy Agency, Ibaraki (Japan)
  12. GSI Helmholtz Centre for Heavy Ion Research GmbH, Darmstadt (Germany)
  13. Helmholtz Inst. Mainz (Germany); Johannes Gutenberg Univ., Mainz (Germany)
  14. Univ. of Warsaw, Warsaw (Poland); Univ. of York, York (United Kingdom)
  15. Helmholtz Inst. Mainz (Germany); Univ. of Groningen, Groningen (The Netherlands)
  16. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
  17. Univ. of Liverpool, Liverpool (United Kingdom); Helmholtz Institute Mainz, Mainz (Germany)
  18. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw, Warsaw (Poland); Michigan State Univ., East Lansing, MI (United States)
  19. Univ. of Oslo, Oslo (Norway)
  20. Univ. of Liverpool, Liverpool (United Kingdom); Univ. of Jyvaskyla, Jyvaskyla (Finland)
  21. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Michigan State Univ., East Lansing, MI (United States)
  22. Paul Scherrer Inst. (PSI) and Univ. of Bern, Villigen (Switzerland)
+ Show Author Affiliations
Here, products of the fusion-evaporation reaction 48Ca+243Am were studied at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α–α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289115 due to the fact that these recoil-α–α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α–α-fission decay chains, as well as some of the recoil-α–α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288115.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Michigan State Univ., East Lansing, MI (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
European Commision (EC); German Federal Ministry of Education and Research (BMBF); Royal Physiographic Society in Lund (Sweden); Science and Technology Facilities Council (STFC) (United Kingdom); Swedish Research Council (SRC); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; NA0002574; NA0002847; SC0008511
OSTI ID:
1332816
Alternate ID(s):
OSTI ID: 1347248
OSTI ID: 1358655
OSTI ID: 1454485
OSTI ID: 1492176
Journal Information:
Nuclear Physics. A, Journal Name: Nuclear Physics. A Journal Issue: C Vol. 953; ISSN 0375-9474
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (39)

How well do we understand the synthesis of heavy elements by heavy-ion induced fusion? journal March 1992
Some remarks on the error analysis in the case of poor statistics journal February 1984
A new test for random events of an exponential distribution journal July 2000
Preparation of actinide targets for the synthesis of the heaviest elements journal July 2013
High intensity target wheel at TASCA: target wheel control system and target monitoring journal July 2013
Selected spectroscopic results on element 115 decay chains journal August 2014
On the nuclear structure and stability of heavy and superheavy elements journal June 1969
Nuclear properties according to the Thomas-Fermi model journal May 1996
TASISpec—A highly efficient multi-coincidence spectrometer for nuclear structure investigations of the heaviest nuclei
  • Andersson, L. -L.; Rudolph, D.; Golubev, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 622, Issue 1 https://doi.org/10.1016/j.nima.2010.06.243
journal October 2010
A Geant4 simulation package for the TASISpec experimental detector setup
  • Sarmiento, L. G.; Andersson, L. -L.; Rudolph, D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 667 https://doi.org/10.1016/j.nima.2011.11.074
journal March 2012
Study of the average charge states of 188Pb and 252,254No ions at the gas-filled separator TASCA
  • Khuyagbaatar, J.; Ackermann, D.; Andersson, L. -L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 689 https://doi.org/10.1016/j.nima.2012.06.007
journal October 2012
Simulation of recoil trajectories in gas-filled magnetic separators journal May 2013
The Lund–York–Cologne Calorimeter (LYCCA): Concept, design and prototype developments for a FAIR-NUSTAR detector system to discriminate relativistic heavy-ion reaction products
  • Golubev, P.; Wendt, A.; Scruton, L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 723 https://doi.org/10.1016/j.nima.2013.04.058
journal September 2013
The TransActinide Separator and Chemistry Apparatus (TASCA) at GSI – Optimization of ion-optical structures and magnet designs
  • Semchenkov, A.; Brüchle, W.; Jäger, E.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20 https://doi.org/10.1016/j.nimb.2008.05.132
journal October 2008
Fusion-fission dynamics of super-heavy element formation and decay journal April 2004
In-beam and decay spectroscopy of transfermium nuclei journal October 2008
Spectroscopic Tools Applied to Element Z = 115 Decay Chains journal January 2014
Nuclear Structure of the Heaviest Elements – Investigated at SHIP-GSI journal January 2014
Future of superheavy element research: Which nuclei could be synthesized within the next few years? journal March 2013
Spontaneous-fission half-lives of deformed superheavy nuclei journal October 1995
Eleven new heaviest isotopes of elements Z = 105 to Z = 117 identified among the products of Bk 249 + Ca 48 reactions journal May 2011
First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the Pu 244 ( Ca 48 ,3-4 n ) reaction journal May 2011
Nuclear energy density optimization: Large deformations journal February 2012
Predictions of the fusion-by-diffusion model for the synthesis cross sections of Z = 114 –120 elements based on macroscopic-microscopic fission barriers journal July 2012
Spontaneous fission modes and lifetimes of superheavy elements in the nuclear density functional theory journal February 2013
Decay spectroscopy of element 115 daughters: Rg 280 → Mt 276 and Mt 276 → Bh 272 journal August 2015
Synthesis of a New Element with Atomic Number Z = 117 journal April 2010
Production and Decay of Element 114: High Cross Sections and the New Nucleus Hs 277 journal June 2010
New Insights into the Am 243 + Ca 48 Reaction Products Previously Observed in the Experiments on Elements 113, 115, and 117 journal January 2012
Ca 48 + Bk 249 Fusion Reaction Leading to Element Z = 117 : Long-Lived α -Decaying Db 270 and Discovery of Lr 266 journal May 2014
Structure of Odd- N Superheavy Elements journal August 1999
Superheavy element chemistry at GSI – status and perspectives journal February 2007
Decay Properties and Stability of Heaviest Elements journal February 2012
New Result in the Production and Decay of an Isotope, 278 113, of the 113th Element journal October 2012
Discovery of the elements with atomic numbers greater than or equal to 113 (IUPAC Technical Report) journal June 2011
Spontaneous Fission journal January 1995
Synthesis of the heaviest elements in 48 Ca-induced reactions journal July 2011
journal January 2012
Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains journal January 2014

Cited By (4)

Nuclear structure of the transactinides – investigated by decay spectroscopy journal January 2016
Comment on ‘Analysis of decay chains of superheavy nuclei produced in the 249 Bk + 48 Ca and 243 Am + 48 Ca reactions’ journal November 2018
Reply to Comment on ‘Analysis of decay chains of superheavy nuclei produced in the 249 Bk + 48 Ca and 243 Am + 48 Ca reactions’ journal November 2018
Nuclear structure of the transactinides – investigated by decay spectroscopy text January 2016

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Element 115
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