Spin-isospin resonances: A self-consistent covariant description

Details Spin-isospin resonances: A self-consistent covariant description Spin-isospin resonances: A self-consistent covariant description

2008-08-23

arxiv.org/abs/0808.3159v1

Phys.Rev.Lett.101:122502,2008

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures. Phys. Rev. Lett. in press

Scientific paper

10.1103/PhysRevLett.101.122502

For the first time a fully self-consistent charge-exchange relativistic RPA based on the relativistic Hartree-Fock (RHF) approach is established. The self-consistency is verified by the so-called isobaric analog state (IAS) check. The excitation properties and the non-energy weighted sum rules of two important charge-exchange excitation modes, the Gamow-Teller resonance (GTR) and the spin-dipole resonance (SDR), are well reproduced in the doubly magic nuclei $^{48}$Ca, $^{90}$Zr and $^{208}$Pb without readjustment of the particle-hole residual interaction. The dominant contribution of the exchange diagrams is demonstrated.

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