Spin-Isospin Resonances: A Self-Consistent Covariant Description

H. Liang (1) , N. van Giai (1) , J. Meng (1)

1 IPNO - Institut de Physique Nucléaire d'Orsay

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 nonenergy 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 48Ca, 90Zr and 208Pb without readjustment of the particle-hole residual interaction. The dominant contribution of the exchange diagrams is demonstrated.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

H. Liang, N. van Giai, J. Meng. Spin-Isospin Resonances: A Self-Consistent Covariant Description. Physical Review Letters, 2008, 101, pp.122502. ⟨10.1103/PhysRevLett.101.122502⟩. ⟨in2p3-00422008⟩