| Original Articles |
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Gamow-Teller Resonance of 90Zr in a Relativistic Approach |
| MA Zhong-Yu1,2,3;CHEN Bao-Qiu1,2 |
| 1China Institute of Atomic Energy, Beijing 102413
2Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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MA Zhong-Yu, CHEN Bao-Qiu 2003 Chin. Phys. Lett. 20 1025-1027 |
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Abstract We establish the formalism of nuclear spin-isospin excitations, especially the Gamow-Teller resonance in a fully consistent relativistic random phase approximation. A relativistic form of the Landau-Migdal parameter g' is adopted as a residual spin-isospin correlation force. In the non-relativistic limit it reproduces the excitation energy of the giant Gamow-Teller resonance state obtained in the non-relativistic model. The Gamow-Teller resonance for finite nuclei is investigated in a relativistic approach for the first time. It is found that the Ikeda sum rule of 90Zr is quenched about 8% in the Hartree as well as the correlated strengths due to the poles of the negative Dirac states at energies above 1 GeV.
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| Keywords:
21.60.-n
21.60.Jz
24.10.Jv
24.30.Cz
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Published: 01 July 2003
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| PACS: |
21.60.-n
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(Nuclear structure models and methods)
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21.60.Jz
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(Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))
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24.10.Jv
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(Relativistic models)
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24.30.Cz
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(Giant resonances)
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