Convergence of Particle-Hole Expansions for the Description of Nuclear Correlations

Abstract

The convergence properties of a multiparticle-multihole (mp-mh) configuration mixing approach whose purpose is to describe ground state correlations in nuclei without particle number and Pauli violations is investigated in the case of an exactly solvable pairing hamiltonian. Two different truncation schemes are tested by looking at quantities as correlation energies and single-particle occupation probabilities. Results show that pairing correlations present in usual superfluid nuclei can be accurately described using up to 6 particle-6 hole excitations, a convergence fast enought for envisaging extensions to fully microscopic calculations.

8 pages, 4 figures

References in corpus (2)

• New effective interaction for $pf$-shell nuclei and its implications for the stability of the $N$=$Z$=28 closed core
• The N=28 shell closure; from N=Z to the neutron drip line

Cited by in corpus (4)

• Variational multiparticle-multihole configuration mixing method applied to pairing correlations in nuclei
• Number-conserving theory of nuclear pairing gaps: a global assessment
• Ground-state properties of even-even N=Z nuclei within the Hartree-Fock-BCS and Higher Tamm-Dancoff approaches
• Combining symmetry breaking and restoration with configuration interaction: a highly accurate many-body scheme applied to the pairing Hamiltonian