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Projectile Coulomb excitation with fast radioactive beams

  • Nuclear Structure and Reactions
  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

We report a search for γ rays emanating from Coulomb excitation of fast (30–46 MeV/u) radioactive projectiles8He,11,12,14Be interacting with a lead target. These are clearly identified by their Doppler shift. The 320 keV 1/2− → 1/2+ γ transition from11Be was observed with a cross-section of 191±26 mb which is noticeably less than expected from the known lifetime and in the perturbation limit of pure Coulomb excitation. In the other nuclei rather stringent upper limits of 0.01 to 0.2 Weisskopf units, are placed on the hypothetical transition to 1− states.

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Authors and Affiliations

  1. GANIL, BP 5027, F-14021, Caen, France

    R. Anne, D. Bazin, J. M. Corre, M. Lewitowicz & M. G. Saint-Laurent

  2. Fysiska Institutionen, Chalmers Tekniska Högskola, S-412 96, Göteborg, Sweden

    B. Jonson, T. Nilsson, G. Nyman & K. Wilhelmsen-Rolander

  3. Institut de Physique Nucléaire, CNRS-IN2P3, F-91406, Orsay, France

    R. Bimbot, S. Dogny, D. Guillemaud-Mueller, A. C. Mueller, F. Pougheon & O. Sorlin

  4. Gesellschaft für Schwerionenforschung (G.S.I.), D-64291, Darmstadt, Germany

    H. Emling

  5. Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000, Aarhus C, Denmark

    P. G. Hansen, P. Hornshøj & P. Jensen

  6. Institut für Physik, Universität Mainz, D-55099, Mainz, Germany

    R. Neugart

  7. Institut für Kernphysik, Technische Hochschule, D-64289, Darmstadt, Germany

    G. Schrieder

  8. Div. PPE, CERN, CH-1211, Genève 23, Switzerland

    M. J. G. Borge & O. Tengblad

Authors
  1. R. Anne
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  2. D. Bazin
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  3. R. Bimbot
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  4. M. J. G. Borge
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  5. J. M. Corre
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  6. S. Dogny
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  7. H. Emling
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  8. D. Guillemaud-Mueller
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  9. P. G. Hansen
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  10. P. Hornshøj
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  11. P. Jensen
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  12. B. Jonson
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  13. M. Lewitowicz
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  14. A. C. Mueller
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  15. R. Neugart
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  16. T. Nilsson
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  17. G. Nyman
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  18. F. Pougheon
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  19. M. G. Saint-Laurent
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  20. G. Schrieder
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  21. O. Sorlin
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  22. O. Tengblad
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  23. K. Wilhelmsen-Rolander
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Additional information

We would like to thank F. Geoffroy, R. Hue and L. Petizon for their technical assistance during the experiment, N. Alamanos, G. Baur aud C. Bertulani for discussions and R. Lombard for drawing our attention to the Bertlmann-Martin bound. This work was partly supported by la Région Basse Normandie. One of us, G. Schrieder, would like to thank for the support by the German Federal Minister for Research and Technology (BMFT) under contract 06DA641.

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Anne, R., Bazin, D., Bimbot, R. et al. Projectile Coulomb excitation with fast radioactive beams. Z. Physik A - Hadrons and Nuclei 352, 397–401 (1995). https://doi.org/10.1007/BF01299757

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  • DOI: https://doi.org/10.1007/BF01299757

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