| Gamow—Teller Resonance of 90Zr in a Relaztivistic Approach |
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| 作者姓名： | 马中玉 陈宝秋 |
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| 作者单位： | [1]ChinaInstituteofAtomicEnergy,Beijing102413;CenterofTheoreticalnuclearPhysics,NationalLaboratoryofHeavyIonAcceleratorofLanzhou,Lanzhou730000;InstituteofTheoreticalPhysics,ChineseAcademyofSciences,Beijing100080 [2]ChinaInstituteofAtomicEnergy,Beijing102413;CenterofTheoreticalnuclearPhysics,NationalLaboratoryofHeavyIonAcceleratorofLanzhou,Lanzhou730000 |
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| 摘 要： | We establish the formalism of nuclear spin-isospin excitations,especially the Gamow-Teller resonance in a fully consstent 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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| 关 键 词： | Gamow－Teller谐振 相对论接近 原子核 性质 同位旋 旋转 Landau－Migdal参量 随机相位 |
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