Self-consistent random phase approximation within the O(5) model and Fermi transitions

Self-consistent quasiparticle random phase approximation (SCQRPA) is considered in application to the Fermi transitions within the O(5) model. It is demonstrated that SCQRPA improves on renormalized QRPA (RQRPA), a method that has recently become rather popular in this context. The analytical form o...

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Detalles Bibliográficos
Autores principales: Krmpotic, Francisco, Passos, E. J. V. de, Delion, D. S., Dukelsky, Jorge, Schuck, Peter
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 1998
Materias:
Física
Physics
Basis (linear algebra)
Quasiparticle
Matrix (mathematics)
Random phase approximation
Operator (physics)
Transition point
Fermi Gamma-ray Space Telescope
Context (language use)
Quantum mechanics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122862
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:Self-consistent quasiparticle random phase approximation (SCQRPA) is considered in application to the Fermi transitions within the O(5) model. It is demonstrated that SCQRPA improves on renormalized QRPA (RQRPA), a method that has recently become rather popular in this context. The analytical form of the SCQRPA vacuum is used to evaluate all the matrix elements. The SCQRPA results show a general trend similar to the exact solutions. The necessity to change the single particle basis beyond the transition point, and to include the proton-proton and neutron-neutron channels in the QRPA operator, in addition to the proton-neutron one, is pointed out.

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