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Artículo
Excitation of multiple giant dipole resonances: From spherical to deformed nuclei
(Elsevier, 1999)
The effect of deformation on the excitation of multiple giant dipole resonances is studied. Analytical expressions are derived in the framework of the interacting boson model for the energies and E1 properties of giant ...
Artículo
Reorientation and coupling effects in polarized heavy ion fusion
(Elsevier, 1992)
A simple model to understand the reaction mechanisms in the fusion of polarized heavy ions based on tidal symmetry, the sudden approximation and barrier penetration is presented. The model is applied to 23Na+208Pb. The ...
Artículo
Reply to ''Comment on 'Dynamical polarization potential due to the excitation of collective states' ''
(American Physical Society, 1993)
This is a reply to the preceding Comment. We confirm the results of our paper. The differences between our calculations and those of the preceding Comment come mainly from the form factors. Our random-phase-approximation-based ...
Artículo
Dynamical polarization potential due to the excitation of collective states
(American Physical Society, 1991)
Within the Feshbach formalism we calculate the nucleus-nucleus dynamical polarization potential arising from the coupling of the elastic channel to the collective vibrational states, described by the random-phase approximation. ...
Artículo
Accidental degeneracy and hidden symmetry: Rectangular wells with commensurate sides
(American Association of Physics Teachers, 1998)
Two-dimensional quantum square wells and rectangular billiards with commensurate sides are simple systems which exhibit accidental degeneracies. We show that a recent analysis for square wells can be similarly ...
Artículo
Geometric interpretation of the effect of the quadrupole force in the collisions of deformed nuclei
(American Physical Society, 1992)
The effect of a quadrupole force on a set of degenerate states of a rotational band with arbitrary spin projection along the symmetry axis K is studied. Analytic expressions for the eigenvalues and eigenvectors are obtained ...
Artículo
Accidental degeneracy in a simple quantum system: A new symmetry group for a particle in an impenetrable square-well potential
(American Association of Physics Teachers, 1997)
The two-dimensional square-well potential is one of the simplest quantum-mechanical systems that exhibits accidental degeneracy. We show that the double degeneracy present is a consequence of a dynamical symmetry and ...
Artículo
Boson expansion methods applied to a two-level model in the study of multiple giant resonances
(Elsevier, 1999-03-08)
We apply boson expansion methods to an extended exactly solvable Lipkin-Meshkov-Glick model including anharmonicities in analogy with previous microscopic calculations. We study the effects of different approximations ...