| HAL : in2p3-00422088, version 1 |
| arXiv : 0910.0829 |
| DOI : 10.1016/j.nuclphysa.2010.01.247 |
| Fiche détaillée | Récupérer au format |
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| Nuclear Physics A 836 (2010) 225-241 |
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| Phase transitions in the $sdg$ interacting boson model |
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| P. Van Isacker1A. Bouldjedri2S. Zerguine2 |
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| (2010) |
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| A geometric analysis of the $sdg$ interacting boson model is performed. A coherent-state is used in terms of three types of deformation: axial quadrupole ($\beta_2$), axial hexadecapole ($\beta_4$) and triaxial ($\gamma_2$). The phase-transitional structure is established for a schematic $sdg$ hamiltonian which is intermediate between four dynamical symmetries of U(15), namely the spherical ${\rm U}(5)\otimes{\rm U}(9)$, the (prolate and oblate) deformed ${\rm SU}_\pm(3)$ and the $\gamma_2$-soft SO(15) limits. For realistic choices of the hamiltonian parameters the resulting phase diagram has properties close to what is obtained in the $sd$ version of the model and, in particular, no transition towards a stable triaxial shape is found. |
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| 1 : | GANIL - Grand Accélérateur National d'Ions Lourds |
| 2 : | Department of Physics, PRIMALAB Laboratory |
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| THEORIE |
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| Thème(s) | : | Physique/Physique Nucléaire Théorique |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| in2p3-00422088, version 1 | |
| http://hal.in2p3.fr/in2p3-00422088 | |
| oai:hal.in2p3.fr:in2p3-00422088 | |
| Contributeur : Michel Lion | |
| Déposé pour le compte de : | |
| Soumis le : Lundi 5 Octobre 2009, 16:48:13 | |
| Dernière modification le : Lundi 22 Mars 2010, 09:53:38 | |