Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-04-03
Phys.Rev.C79:044311,2009
Physics
Nuclear Physics
Nuclear Theory
19 pages, 13 figures, 7 tables, accepted for publication in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.79.044311
We have studied the low lying magnetic spectra of 12C, 16O, 40Ca, 48Ca and 208Pb nuclei within the Random Phase Approximation (RPA) theory, finding that the description of low-lying magnetic states of doubly-closed-shell nuclei imposes severe constraints on the spin and tensor terms of the nucleon-nucleon effective interaction. We have first made an investigation by using four phenomenological effective interactions and we have obtained good agreement with the experimental magnetic spectra, and, to a lesser extent, with the electron scattering responses. Then we have made self-consistent RPA calculations to test the validity of the finite-range D1 Gogny interaction. For all the nuclei under study we have found that this interaction inverts the energies of all the magnetic states forming isospin doublets.
Anguiano Marcelino
Co' Giampaolo
Donno Viviana de
Lallena Antonio M.
Maieron Chiara
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