HAL : in2p3-00280394, version 1
 arXiv : 0805.2560
 Nuclear Physics A 808 (2008) 27-46
 Triaxiality in the interacting boson model
 B. Sorgunlu1, 2, P. Van Isacker1
 (2008)
 The signature splitting of the $\gamma$-vibrational band of several Ru, Pd, Xe, Ba, Os and Pt isotopes is analyzed in the framework of the interacting boson model (IBM). The nuclei studied are close to the $\gamma$-unstable SO(6) limit of the IBM and have well-known $\gamma$ bands. It is shown that in most nuclei the signature splitting is better reproduced by the inclusion of a three-body interaction between the $d$ bosons. In none of the nuclei evidence for a stable, triaxial ground-state shape is found.
 Thème(s) : Physique/Physique Nucléaire Théorique
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 in2p3-00280394, version 1 http://hal.in2p3.fr/in2p3-00280394 oai:hal.in2p3.fr:in2p3-00280394 Contributeur : Michel Lion <> Déposé pour le compte de : Pieter Van Isacker <> Soumis le : Vendredi 16 Mai 2008, 17:16:31 Dernière modification le : Jeudi 3 Juillet 2008, 16:26:01