Pairing in spherical nuclei: Quasiparticle random-phase approximation calculations with the Gogny interaction

V. De Donno, G. Co', M. Anguiano, and A. M. Lallena
Phys. Rev. C 95, 054329 – Published 31 May 2017

Abstract

We investigate the effects of the pairing in spherical nuclei. We use the same finite-range interaction of Gogny type in the three steps of our approach, Hartree–Fock, Bardeen, Cooper, and Schrieffer, and quasiparticle random-phase-approximation calculations. We study electric- and magnetic-dipole and quadrupole and octupole excitations in oxygen and calcium isotopes and also in isotones with 20 neutrons. We investigate the pairing effects on single-particle energies and occupation probabilities, on the excitation energies, B values, and collectivity of low-lying states including the isoscalar electric-dipole and magnetic-dipole excitations, and also the giant resonances. The inclusion of the pairing increases the values of the excitation energies in all the cases that we have studied. In general, the effects of the pairing are too small to noticeably improve the agreement with the available experimental data.

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  • Received 21 December 2016
  • Revised 8 May 2017

DOI:https://doi.org/10.1103/PhysRevC.95.054329

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

V. De Donno1, G. Co'1,2, M. Anguiano3, and A. M. Lallena3

  • 1Dipartimento di Matematica e Fisica “E. De Giorgi”, Università del Salento, I-73100 Lecce, Italy
  • 2INFN Sezione di Lecce, Via Arnesano, I-73100 Lecce, Italy
  • 3Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada, Spain

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Issue

Vol. 95, Iss. 5 — May 2017

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