Variational multiparticle-multihole configuration mixing method applied to pairing correlations in nuclei

N. Pillet, J.-F. Berger, and E. Caurier
Phys. Rev. C 78, 024305 – Published 12 August 2008

Abstract

Applying a variational multiparticle-multihole configuration mixing method whose purpose is to include correlations beyond the mean field in a unified way without particle number and Pauli principle violations, we investigate pairing-like correlations in the ground states of Sn116, Sn106, and Sn100. The same effective nucleon-nucleon interaction, namely, the D1S parametrization of the Gogny force, is used to derive both the mean field and correlation components of nuclear wave functions. Calculations are performed using an axially symmetric representation. The structure of correlated wave functions, their convergence with respect to the number of particle-hole excitations, and the influence of correlations on single-particle level spectra and occupation probabilities are analyzed and compared with results obtained with the same two-body effective interaction from BCS, Hartree-Fock-Bogoliubov, and particle number projected after variation BCS approaches. Calculations of nuclear radii and the first theoretical excited 0+ states are compared with experimental data.

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  • Received 16 June 2008

DOI:https://doi.org/10.1103/PhysRevC.78.024305

©2008 American Physical Society

Authors & Affiliations

N. Pillet1, J.-F. Berger1, and E. Caurier2

  • 1CEA, DPTA, Service de Physique Nucléaire, Bruyères-le-Châtel, F-91297 Arpajon, France
  • 2Département Recherches Subatomiques, Institut Pluridisciplinaire Hubert Curien, 23 rue du Loess, BP28, F-67037 Strasbourg, France

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Issue

Vol. 78, Iss. 2 — August 2008

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