Collective dipole excitations in neutron-rich nuclei from Sn-132 mass region, the nuclear symmetry energy and neutron skins (CROSBI ID 150231)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Klimkiewicz, A. ; Paar, Nils ; Adrich, P. ; Fallot, M. ; Boretzky, K. ; Aumann, T. ; Cortina-Gil, D. ; Pramanik, U. D. ; Elze, T. W. ; Emling, H., Geissel, H. ; Hellstrom, M. ; Jones, K. L. ; Kratz, J. V. ; Kulessa, R. ; Nociforo, C. ; Palit, R. ; Simon, H. ; Surowka, G. ; Summerer, K. ; Vretenar, Dario ; Walus, W.
engleski
Collective dipole excitations in neutron-rich nuclei from Sn-132 mass region, the nuclear symmetry energy and neutron skins
Dipole strength distributions measured in unstable neutron-rich nuclei in the Sn-132 mass region by utilizing relativistic Coulomb excitation of radioactive beams reveal a sizable fraction of "pygmy" strength below the giant dipole resonance. On the grounds of the RQRPA model, a strong linear correlation between the pygmy strength, parameters of the nuclear symmetry energy and the neutron skin thickness has been found. From the experimentally observed low-lying strength, the symmetry energy pressure p(0) = 2.3 +/- 0.8 MeV/fm(3) and neutron skin thicknesses of 0.23 +/- 0.04 fm Sn-130 and 0.24 +/- 0.04 fm Sn-130 have been extracted.
symmetry energy; pygmy resonances; dipole excitations
projekt UKF 17/08
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