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Mostrando ítems 21-30 de 143
Artículo
Comment on “Pairing interaction and Galilei invariance”
(American Physical Society, 1999)
A recent article by Dussel, Sofia, and Tonina studies the relation between Galilei invariance and dipole energy weighted sum rule (EWSR). The authors find that the pairing interaction, which is neither Galilei nor Lorentz ...
Artículo
Boson-conserving one-nucleon transfer operator in the interacting boson model
(American Physical Society, 2002-03-01)
The boson-conserving one-nucleon transfer operator in the interacting boson model (IBM) is reanalyzed. Extra terms are added to the usual form used for that operator. These new terms change generalized seniority by ...
Artículo
Disentangling phase transitions and critical points in the proton-neutron interacting boson model by catastrophe theory
(Elsevier, 2014)
We introduce the basic concepts of catastrophe theory needed to derive analytically the phase diagram of the proton–neutron interacting boson model (IBM-2). Previous studies [1–3] were based on numerical solutions. We here ...
Tesis Doctoral
Artículo
Coherent state approach to the interacting boson model: Test of its validity in the transitional region
(The American Physical Society, 2009)
The predictive power of the coherent state (CS) approach to the interacting boson model (IBM) is tested far from the IBM dynamical symmetry limits. The transitional region along the γ-unstable path from U(5) to O(6) is ...
Artículo
Intrinsic state for an extended version of the interacting boson model
(American Physical Society, 2000-03-01)
An intrinsic-state formalism for the interacting boson model IBM-4 is presented. A basis of deformed bosons is introduced which allows the construction of a general trial wave function that has Wigner’s spin-isospin SU(4) ...
Artículo
Comment on “Boson-realization model for the vibrational spectra of tetrahedral molecules”
(American Physical Society, 1997)
An algebraic model in terms of a local harmonic boson realization was recently proposed to study molecular vibrational spectra [Zhong-Qi Ma et al., Phys. Rev. A 53, 2173 (1996)]. Because of the local nature of the bosons ...
Artículo
Reactions induced by 9Be in a four-body continuum-discretized coupled-channels framework
(Springer Nature, 2015-06-01)
We investigate the elastic scattering of 9Be on 208Pb at beam energies above (50MeV) and below (40MeV) the Coulomb barrier. The reaction is described within a four-body framework using the Continuum-Discretized Coupled-Channels ...
Artículo
Phase diagram for a cubic-Q interacting boson model Hamiltonian: Signs of triaxiality
(American Physical Society, 2011)
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 ...
Tesis Doctoral
Métodos analíticos para el tratamiento de potenciales anarmónicos en física molecular
(2001-02-16)
El propósito de esta tesis es utilizar dos métodos analíticos para la descripción vibracional de moléculas, que incluyen la naturaleza anarmónica de los sistemas moleculares tanto en el análisis del espectro vibracional ...