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Giant resonances in exotic spherical nuclei within the RPA approach with the Gogny force

  • S. PéruEmail author
  • J. F. Berger
  • P. F. Bortignon
Original Article

Abstract.

Theoretical results for giant resonances in the three doubly magic exotic nuclei 78Ni, 100Sn and 132Sn are obtained from Hartree-Fock (HF) plus Random Phase Approximation (RPA) calculations using the D1S parameterization of the Gogny two-body effective interaction. Special attention is paid to full consistency between the HF field and the RPA particle-hole residual interaction. The results for the exotic nuclei, on average, appear similar to those of stable ones, especially for quadrupole and octupole states. More exotic systems have to be studied in order to confirm such a trend. The low energy of the monopole resonance in 78Ni suggests that the compression modulus in this neutron-rich nucleus is lower than the one of stable ones.

PACS.

21.10.Re Collective levels 24.30.Cz Giant resonances 21.60.Jz Hartree-Fock and random-phase approximations 23.20.Lv γ transitions and level energies 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  1. 1.DPTA/Service de Physique NucléaireBruyères-le-ChâtelFrance
  2. 2.Dipartimento di FisicaUniversità di Milano and INFNMilanoItaly

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