Self-consistent continuum random-phase approximation with finite-range interactions for charge-exchange excitations

V. De Donno, G. Co', M. Anguiano, and A. M. Lallena
Phys. Rev. C 93, 034320 – Published 17 March 2016

Abstract

The formalism of the continuum random-phase approximation theory which treats, without approximations, the continuum part of the single-particle spectrum, is extended to describe charge-exchange excitations. Our approach is self-consistent, meaning that we use a unique, finite-range interaction in the Hartree-Fock calculations which generate the single-particle basis and in the continuum-random phase approximation which describes the excitation. We study excitations induced by the Fermi, Gamow-Teller and spin-dipole operators in doubly magic nuclei by using four Gogny-like finite-range interactions, two of them containing tensor forces. We focus our attention on the importance of the correct treatment of the continuum configuration space and on the effects of the tensor terms of the force.

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  • Received 10 July 2015
  • Revised 14 January 2016

DOI:https://doi.org/10.1103/PhysRevC.93.034320

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

V. De Donno

  • Dipartimento di Matematica e Fisica “E. De Giorgi”, Università del Salento, I-73100 Lecce, Italy

G. Co'

  • Dipartimento di Matematica e Fisica “E. De Giorgi”, Università del Salento, I-73100 Lecce, Italy and INFN Sezione di Lecce, Via Arnesano, I-73100 Lecce, Italy

M. Anguiano and A. M. Lallena

  • Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada, Spain

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Issue

Vol. 93, Iss. 3 — March 2016

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