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Observation of bound excited states in 15B

  • M. Stanoiu
  • M. Belleguic
  • Zs. Dombrádi
  • D. Sohler
  • F. Azaiez
  • B. A. Brown
  • M. J. Lopez-Jimenez
  • M. G. Saint-Laurent
  • O. Sorlin
  • Yu.-E Penionzhkevich
  • N. L. Achouri
  • J. C. Angélique
  • C. Borcea
  • C. Bourgeois
  • J. M. Daugas
  • F. De Oliveira-Santos
  • Z. Dlouhy
  • C. Donzaud
  • J. Duprat
  • S. Grévy
  • D. Guillemaud-Mueller
  • S. Leenhardt
  • M. Lewitowicz
  • S. M. Lukyanov
  • W. Mittig
  • M. G. Porquet
  • F. Pougheon
  • P. Roussel-Chomaz
  • H. Savajols
  • Y. Sobolev
  • C. Stodel
  • J. Timár
Letter

Abstract.

The structure of the A/Z = 3 nucleus 15B has been investigated using the in-beam \(\gamma\)-spectroscopy technique with a fragmentation reaction of a 36S beam on a 9Be target at 77.5 \({\rm MeV}\cdot A\). The fragments were identified and selected by their energy loss and time of flight using the SPEG spectrograph. \(\gamma\)-ray energies and intensities have been measured in coincidence with the projectile-like fragments. From this information as well as from the \(\gamma\gamma\)-coincidence relationships a level scheme is proposed for 15B up to the neutron separation energy. The experimental results have been interpreted using shell model calculations in the psd valence space. Effects of the weakly bound nature of the valence neutrons have been observed.

Keywords

Spectroscopy Excited State Separation Energy Elementary Particle Model Calculation 
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

  • M. Stanoiu
    • 1
  • M. Belleguic
    • 1
  • Zs. Dombrádi
    • 2
  • D. Sohler
    • 2
  • F. Azaiez
    • 1
  • B. A. Brown
    • 3
  • M. J. Lopez-Jimenez
    • 4
  • M. G. Saint-Laurent
    • 4
  • O. Sorlin
    • 1
  • Yu.-E Penionzhkevich
    • 5
  • N. L. Achouri
    • 6
  • J. C. Angélique
    • 6
  • C. Borcea
    • 7
  • C. Bourgeois
    • 1
  • J. M. Daugas
    • 4
  • F. De Oliveira-Santos
    • 4
  • Z. Dlouhy
    • 8
  • C. Donzaud
    • 1
  • J. Duprat
    • 1
  • S. Grévy
    • 6
  • D. Guillemaud-Mueller
    • 1
  • S. Leenhardt
    • 1
  • M. Lewitowicz
    • 4
  • S. M. Lukyanov
    • 5
  • W. Mittig
    • 4
  • M. G. Porquet
    • 9
  • F. Pougheon
    • 1
  • P. Roussel-Chomaz
    • 4
  • H. Savajols
    • 4
  • Y. Sobolev
    • 5
  • C. Stodel
    • 4
  • J. Timár
    • 2
  1. 1.Institut de Physique NucléaireIN2P3-CNRSOrsay CedexFrance
  2. 2.Institute of Nuclear ResearchDebrecenHungary
  3. 3.NSCLMichigan State UniversityEast LansingUSA
  4. 4.GANILCaen Cedex 5France
  5. 5.FLNRJINRDubna, Moscow regionRussia
  6. 6.Laboratoire de Physique CorpusculaireCaen CedexFrance
  7. 7.IFIN-HHBucarest-MagureleRomania
  8. 8.Nuclear Physics InstituteAS CRRezCzech Republic
  9. 9.CSNSM, IN2P3-CNRS and Université Paris-SudOrsay CampusFrance

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