Unrestricted symmetry-projected Hartree-Fock-Bogoliubov calculations for some PF-shell nuclei
T. Hjelt1 - K.W. Schmid2 - E. Hammarén1 - A. Faessler2
1 Department of Physics, University of Jyväskylä, P.O. Box 35(Y5), 40351 Jyväskylä,
2 Institut für Theoretische Physik der Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany
Received: 15 September 1999 Communicated by D. Schwalm
Total binding energies and yrast energy spectra of three selected 1p0f-nuclei have been calculated using an unrestricted Hartree-Fock-Bogoliubov approach with symmetry-projection before the variation. The full 1p0f-shell has been used as single-particle basis and the semi-empirical FPD6 interaction as effective Hamiltonian. The results are compared to those of truncated shell-model calculations performed with the OXBASH code. In the middle of the 1p0f-shell the variational method yields energy gains up to 4.5 MeV and thus proves to be far superior than the conventional truncation methods at least if in the latter only up to about 13000 configurations for each spin-isospin combination are admitted.
Copyright Società Italiana di Fisica, Springer-Verlag 2000