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Claes Fahlander

Professor emeritus

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Spectroscopy along flerovium decay chains. II. Fine structure in odd-A 289Fl

Author

  • D. M. Cox
  • A. Såmark-Roth
  • D. Rudolph
  • L. G. Sarmiento
  • R. M. Clark
  • J. L. Egido
  • P. Golubev
  • J. Heery
  • A. Yakushev
  • S. Åberg
  • H. M. Albers
  • M. Albertsson
  • M. Block
  • H. Brand
  • T. Calverley
  • R. Cantemir
  • B. G. Carlsson
  • Ch. E. Düllmann
  • J. Eberth
  • C. Fahlander
  • U. Forsberg
  • J. M. Gates
  • F. Giacoppo
  • M. Götz
  • S. Götz
  • R.-D. Herzberg
  • Y. Hrabar
  • E. Jäger
  • D. Judson
  • J. Khuyagbaatar
  • B. Kindler
  • I. Kojouharov
  • J. V. Kratz
  • J. Krier
  • N. Kurz
  • L. Lens
  • J. Ljungberg
  • B. Lommel
  • J. Louko
  • C.-C. Meyer
  • A. Mistry
  • C. Mokry
  • P. Papadakis
  • E. Parr
  • J. L. Pore
  • I. Ragnarsson
  • J. Runke
  • M. Schädel
  • H. Schaffner
  • B. Schausten
  • D. A. Shaughnessy
  • P. Thörle-Pospiech
  • N. Trautmann
  • J. Uusitalo
Show all

Summary, in English

Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus 289Fl were observed following the fusion-evaporation reaction 48Ca+244Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of 289Fl. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α-decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between 285Cn and 281Ds. Our experimental results, on the excited level structure of the heaviest odd-N nuclei to date, provide a direct testing ground for theory. This is illustrated by comparison with new nuclear structure calculations based on the symmetry-conserving configuration mixing theory.

Department/s

  • Nuclear physics
  • Mathematical Physics

Publishing year

2023-02-06

Language

English

Publication/Series

Physical Review C

Volume

107

Issue

2

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Keywords

  • Superheavy elements
  • Nuclear spectroscopy
  • Alpha decay
  • Mean field theory
  • Island of stability

Status

Published

Project

  • Characterization of New Superheavy Elements
  • Nuclear Structure at the Limits: Isotope-selective Spectroscopy
  • Spectroscopy along Decay Chains of Element 114, Flerovium

ISBN/ISSN/Other

  • ISSN: 2469-9985