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Spin-Isospin Resonances: A Self-Consistent Covariant Description

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00422008
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Submitted on : Monday, October 5, 2009 - 2:57:57 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:54 PM

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

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