Robust Regularity in ��-Soft Nuclei and its Microscopic Realization
| Autor: | Nomura, K., Shimizu, N., Vretenar, D., Niksic, T., Otsuka, T. |
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| Rok vydání: | 2011 |
| Předmět: | |
| DOI: | 10.48550/arxiv.1109.5754 |
| Popis: | ��-softness in atomic nuclei is investigated in the framework of energy density functionals. By mapping constrained microscopic energy surfaces for a set of representative non-axial medium-heavy and heavy nuclei to a Hamiltonian of the proton-neutron interacting boson model (IBM-2) containing up to three-body interactions, low-lying collective spectra and transition rates are calculated. Observables are analyzed that distinguish between the two limiting geometrical pictures of non-axial nuclei: the rigid-triaxial rotor and the ��-unstable rotor. It is shown that neither of these pictures is realized in actual nuclei, and that a microscopic description leads to results that are almost exactly in between the two geometrical limits. This finding points to the optimal choice of the IBM Hamiltonian for ��-soft nuclei. 5 pages, 3 figures, Phys. Rev. Lett. in press |
| Databáze: | OpenAIRE |
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