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

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.024305· OSTI ID:21192103

Pillet, N; Berger, J -F ^[1]; Caurier, E ^[2]

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1. CEA, DPTA, Service de Physique Nucleaire, Bruyeres-le-Chatel, F-91297 Arpajon (France)
2. Departement Recherches Subatomiques, Institut Pluridisciplinaire Hubert Curien, 23 rue du Loess, BP28, F-67037 Strasbourg (France)

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 {sup 116}Sn, {sup 106}Sn, and {sup 100}Sn. 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{sup +} states are compared with experimental data.

• OSTI ID: 21192103
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevC.78.024305; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AXIAL SYMMETRY
BCS THEORY
COMPARATIVE EVALUATIONS
CONFIGURATION MIXING
CORRELATIONS
EXCITATION
GROUND STATES
HARTREE-FOCK-BOGOLYUBOV THEORY
MEAN-FIELD THEORY
NUCLEAR RADII
NUCLEON-NUCLEON INTERACTIONS
PAULI PRINCIPLE
PROBABILITY
SIMULATION
SPECTRA
TIN 100
TIN 106
TIN 116
TWO-BODY PROBLEM
VARIATIONAL METHODS
WAVE FUNCTIONS