Artículo
Phase diagram for a cubic-Q interacting boson model Hamiltonian: Signs of triaxiality
Autor/es | Fortunato, Lorenzo
Alonso Alonso, Clara Eugenia Arias Carrasco, José Miguel García Ramos, José Enrique Vitturi, Andrea |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2011 |
Fecha de depósito | 2019-03-25 |
Publicado en |
|
Resumen | An extension of the Interacting Boson Model that includes the cubic (QI×QI×Q I)(0) term is proposed. The potential energy surface for the cubic quadrupole interaction is explicitly calculated within the coherent state ... An extension of the Interacting Boson Model that includes the cubic (QI×QI×Q I)(0) term is proposed. The potential energy surface for the cubic quadrupole interaction is explicitly calculated within the coherent state formalism using the complete (χ-dependent) expression for the quadrupole operator. The Q-cubic term is found to depend on the asymmetry deformation parameter γ as a linear combination of cos(3γ) and cos2(3γ) terms, thereby allowing for triaxiality. The phase diagram of the model in the large N limit is explored: The orders of the phase transition surfaces that define the phase diagram are described, and the possible nuclear equilibrium shapes are established. It is found that for this particular Hamiltonian, contrary to expectations, there is only a very tiny region of triaxiality, and that the transition from prolate to oblate shapes is so fast that, in most cases, the onset of triaxiality might go unnoticed. |
Identificador del proyecto | ACI2009-1047
AIC10-D-000590 FIS2008-04189 FPA2007-63074 CSD2007-00042 FQM160 FQM318 P05-FQM437 P07-FQM-02962 |
Cita | Fortunato, L., Alonso Alonso, C.E., Arias Carrasco, J.M., García Ramos, J.E. y Vitturi, A. (2011). Phase diagram for a cubic-Q interacting boson model Hamiltonian: Signs of triaxiality. Physical Review C - Nuclear Physics, 84 (1), 014326. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Phase diagram for a cubic-Q ... | 1.228Mb | [PDF] | Ver/ | |