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Search for cluster structure of excited states in 14 C

  • W. von OertzenEmail author
  • H. G. Bohlen
  • M. Milin
  • Tz Kokalova
  • S. Thummerer
  • A. Tumino
  • R. Kalpakchieva
  • T. N. Massey
  • Y. Eisermann
  • G. Graw
  • T. Faestermann
  • R. Hertenberger
  • H.-F. Wirth
Article

Abstract.

We have studied three different 2n-transfer reactions on a 12C target, the 2p pick-up reaction on 16O and the 5He transfer in the reaction 9Be(7Li,d)14C. Combined with a systematic search through experimental results for transfer reactions, inelastic excitations and other data, we have established an almost complete spectroscopy for 14C up to 18 MeV excitation. We identify states with single-particle structure that have oblate shapes and states corresponding to proton excitations that are connected to oblate (triangular) cluster states. Further we list states of prolate shape which have no simple structure related to the low-lying oblate states of 12C. These are proposed to have strong \(\alpha\)-clustering and to form rotational bands as a parity inversion doublet, with high moment of inertia. With these results it is possible for the first time to identify chain states expected in the isotope 14C.

Keywords

Transfer Reaction Prolate Systematic Search Cluster Structure Cluster State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • W. von Oertzen
    • 1
    • 2
    Email author
  • H. G. Bohlen
    • 2
  • M. Milin
    • 1
    • 2
    • 3
  • Tz Kokalova
    • 1
    • 2
  • S. Thummerer
    • 2
  • A. Tumino
    • 1
    • 2
    • 4
  • R. Kalpakchieva
    • 5
    • 6
  • T. N. Massey
    • 7
  • Y. Eisermann
    • 8
  • G. Graw
    • 8
  • T. Faestermann
    • 9
  • R. Hertenberger
    • 8
  • H.-F. Wirth
    • 7
  1. 1.Fachbereich PhysikFreie Universität BerlinBerlinGermany
  2. 2.Hahn-Meitner-Institut BerlinBerlinGermany
  3. 3.Ruder Bošković InstituteZagrebCroatia
  4. 4.INFN-Laboratori Nazionali del Sud and Universitá di CataniaCataniaItaly
  5. 5.Flerov Laboratory of Nuclear ReactionsJINRDubnaRussia
  6. 6.BASInstitute for Nuclear Research and Nuclear EnergySofiaBulgaria
  7. 7.Department of Physics and AstronomyOhio UniversityAthensUSA
  8. 8.Sektion Physik der Universität MünchenGarchingGermany
  9. 9.Technische Universität MünchenGarchingGermany

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