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1. chinaXiv:201708.00260 [pdf]

Spherical-box approach for resonances in presence of Coulomb interaction

Shan-Gui Zhou; Jie Meng; En-Guang Zhao
Subjects: Physics >> Nuclear Physics

The spherical-box approach is extended to calculate the resonance parameters and the real part of the wave function for single particle resonances in a potential containing the long-range Coulomb interaction. A model potential is taken to demonstrate the ability and accuracy of this approach. The calculated resonance parameters are compared with available results from other methods. It is shown that in the presence of the Coulomb interaction, the spherical-box approach works well for not so broad resonances. In particular, for very narrow resonances, the present method gives resonance parameters in a very high precision.

submitted time 2017-08-22 Hits1800Downloads987 Comment 0

2. chinaXiv:201708.00259 [pdf]

Neutron halo in deformed nuclei

Shan-GuiZhou; JieMeng; P.Ring; En-GuangZhao
Subjects: Physics >> Nuclear Physics

Halo phenomena in deformed nuclei are investigated within a deformed relativistic Hartree Bo- goliubov (DRHB) theory. These weakly bound quantum systems present interesting examples for the study of the interdependence between the deformation of the core and the particles in the halo. Contributions of the halo, deformation effects, and large spatial extensions of these systems are described in a fully self-consistent way by the DRHB equations in a spherical Woods-Saxon basis with the proper asymptotic behavior at large distance from the nuclear center. Magnesium and neon isotopes are studied and detailed results are presented for the deformed neutron-rich and weakly bound nucleus 44Mg. The core of this nucleus is prolate, but the halo has a slightly oblate shape. This indicates a decoupling of the halo orbitals from the deformation of the core. The generic conditions for the occurence of this decoupling effects are discussed.

submitted time 2017-08-22 Hits1361Downloads780 Comment 0

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