RT Journal Article
T1 Phase diagram for a Cubic Consistent-Q Interacting Boson Model Hamiltonian : signs of triaxiality
A1 Fortunato, Lorenzo
A1 Alonso, C. E.
A1 Arias Carrasco, José Miguel
A1 García Ramos, José Enrique
A1 Viturri, A.
K1 Física nuclear
K1 Bosones
AB An extension of the Consistent-Q formalism for the Interacting Boson Model that includes thecubic (^Q   ^Q   ^Q)(0) term is proposed. The potential energy surface for the cubic quadrupole interac-tion is explicitly calculated within the coherent state formalism using the complete ( x-dependent)expression for the quadrupole operator. The Q-cubic term is found to depend on the asymmetrydeformation parameter  as a linear combination of cos (3) and cos2 (3) terms, thereby allowingfor triaxiality. The phase diagram of the model in the large N limit is explored, it is described theorder of the phase transition surfaces that de ne the phase diagram, and moreover, the possiblenuclear equilibrium shapes are established. It is found that, contrary to expectations, there is onlya very tiny region of triaxiality in the model, and that the transition from prolate to oblate shapesis so fast that, in most cases, the onset of triaxiality might go unnoticed.
PB American Physical Society
SN 0556-2813
YR 2011
FD 2011
LK http://hdl.handle.net/10272/5447
UL http://hdl.handle.net/10272/5447
LA eng
NO Fortunato, L., Alonso, C. E., Arias, J. M., Vitturi, A.: "Phase diagram for a Cubic Consistent-Q Interacting Boson Model Hamiltonian: signs of triaxiality". Physical Review C . Vol. 84, n. 1 (2011). ISSN 0556-2813
NO We acknowledge enlightening conversations on this topic with F. Iachello. This work has been partially supported by the Italian Istituto Nazionale di Fisica Nucleare (INFN)-Spanish Ministerio de Ciencia Y Tecnologia (MCYT) scientific agreements (No. ACI2009-1047 and No. AIC10-D-000590), the Spanish Ministerio de Educacion y Ciencia and the European Regional Development Fund (FEDER) under Projects No. FIS2008-04189 and No. FPA2007-63074, the Consolider-Ingenio CPAN, No. CSD2007-00042, and the Junta de Andalucia under Projects No. FQM160, No. FQM318, No. P05-FQM437, and No. P07-FQM-02962. L.F. acknowledges support from the ECT* and FBK-Trento.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026