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Δ Excitation in Nuclei by Heavy Ion Charge-Exchange Reactions

  • Michèle Roy-Stéphan
Part of the NATO ASI Series book series (NSSB, volume 205)

Abstract

An extensive program on charge-exchange reactions is developed at Laboratoire National SATURNE. It consists of experiments on (3He,t), (d,2He) and heavy ion charge- exchange. In the incident energy domain around 1 GeV per nucleon, the spin-isospin modes are selectively excited. The spin-isospin response is concentrated in two excitation energy domains: — At low excitation energy, several particle-hole states contribute, the Gamow-Teller resonance and higher multipolarity spin-flip resonances. — Around 300 MeV, a nucleon from the target is excited into a Δ (1232) resonance. The strength in the Δ sector has the same order of magnitude as in the nuclear sector. In the case of Δ excitation, one π exchange is expected to be dominant and to induce collective or at least coherent attractive effects.

Keywords

Integrate Cross Section Extreme Surface Niels Bohr Institute Short Range Contribution Nuclear Sector 
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.

References

  1. 1).
    D. Bachelier et. al., Phys. Lett. 172B (1986) 23. M. Roy-Stéphan Nucl. Phys. A488 (1988) 187c.Google Scholar
  2. 2).
    C. Guet, M. Soyeur, J. Bowlin and G. E. Brown, Preprint Saclay PhT/88-160 to be published in Nucl. Phys., and references therein.Google Scholar
  3. 3).
    T. Udagawa, S. W. Hong and F. Osterfeld, to be published.Google Scholar
  4. 4).
    H. Esbensen and T. S. H. Lee, Phys. Rev. C12 (1985) 1966.Google Scholar
  5. 5).
    J. Delorme and P.A.M. Guichon, Proceedings of 10eme Session d’Etudes Biennale de Physique nucléaire, Aussois 1989. Rap. IPN Lyon LYCEN 8902 (1989) C. 4. 1.Google Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Michèle Roy-Stéphan
    • 1
  1. 1.I.P.N. OrsayOrsay CedexFrance

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