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Claes Fahlander

Professor emeritus

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

Author

  • U. Forsberg
  • D. Rudolph
  • L. L. Andersson
  • A. Di Nitto
  • Ch E. Düllmann
  • C. Fahlander
  • J. M. Gates
  • P. Golubev
  • K. E. Gregorich
  • C. J. Gross
  • R. D. Herzberg
  • F. P. Heßberger
  • J. Khuyagbaatar
  • J. V. Kratz
  • K. Rykaczewski
  • L. G. Sarmiento
  • M. Schädel
  • A. Yakushev
  • Sven Åberg
  • D. Ackermann
  • M. Block
  • H. Brand
  • Gillis Carlsson
  • D. Cox
  • X. Derkx
  • J. Dobaczewski
  • K. Eberhardt
  • J. Even
  • J. Gerl
  • E. Jäger
  • B. Kindler
  • J. Krier
  • I. Kojouharov
  • N. Kurz
  • B. Lommel
  • A. Mistry
  • C. Mokry
  • W. Nazarewicz
  • H. Nitsche
  • J. P. Omtvedt
  • P. Papadakis
  • I. Ragnarsson
  • J. Runke
  • H. Schaffner
  • B. Schausten
  • Yue Shi
  • P. Thörle-Pospiech
  • T. Torres
  • T. Traut
  • N. Trautmann
  • A. Türler
  • A. Ward
  • D. E. Ward
  • N. Wiehl
Show all

Summary, in English

Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA 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.

Department/s

  • Nuclear physics
  • Mathematical Physics

Publishing year

2016-09-01

Language

English

Pages

117-138

Publication/Series

Nuclear Physics, Section A

Volume

953

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics
  • Natural Sciences

Keywords

  • Element 115
  • Spontaneous fission
  • Superheavy elements
  • Uup
  • α decay

Status

Published

Project

  • Element 115
  • Nuclear Structure at the Limits: Isotope-selective Spectroscopy

ISBN/ISSN/Other

  • ISSN: 0375-9474