Giant resonances in exotic spherical nuclei within the RPA approach with the Gogny force |
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Authors: | Email author" target="_blank">S?PéruEmail author J?F?Berger P?F?Bortignon |
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Institution: | (1) DPTA/Service de Physique Nucléaire, BP 12, F-91680 Bruyères-le-Chatel, France;(2) Dipartimento di Fisica, Università di Milano and INFN, Via Celoria 16, I-20133 Milano, Italy |
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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. |
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Keywords: | 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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