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Symmetry Energy and Isovector Giant Dipole Resonance in Finite Nuclei |
| CAO Li-Gang1,3;MA Zhong-Yu 2,3 |
| 1Institute of Modern Physics, Chinese Academy of Science, Lanzhou 7300002China Institute of Atomic Energy, Beijing 1024133 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 |
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| Cite this article: |
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CAO Li-Gang, MA Zhong-Yu 2008 Chin. Phys. Lett. 25 1625-1628 |
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Abstract We study the relationship between the properties of the isovector giant dipole resonance of finite nuclei and the symmetry energy in the framework of the relativistic mean field theory with six different parameter sets of nonlinear
effective Lagrangian. A strong linear correlation of excited energies of the dipole resonance in finite nuclei and symmetry energy at and below the saturation density is found. This linear correlation leads to the symmetry energy at the saturation density at the interval 33.0MeV ≤ S(ρ0)≤37.0,MeV. The comparison to the present experimental data in the soft dipole mode
of 132Sn constrains approximately the symmetry energy at ρ= 0.1fm-3 at the interval 21.2MeV~22.5MeV. It is proposed that a precise measurement of the soft dipole mode in neutron rich nuclei could set up an important constraint on the equation of state for asymmetric nuclear matter.
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| Keywords:
21.60.Jz
21.65.Ef
24.30.Cz
24.30.Cd
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Received: 15 January 2008
Published: 29 April 2008
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| PACS: |
21.60.Jz
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(Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))
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21.65.Ef
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(Symmetry energy)
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24.30.Cz
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(Giant resonances)
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24.30.Cd
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