Unrestricted symmetry-projected Hartree-Fock-Bogoliubov calculations for SD-shell nuclei
E. Hammarén1,2 - K.W. Schmid1 - A. Faessler1
1 Institut für Theoretische Physik der Universität Tübingen, Auf der
Morgenstelle 14, D-72076 Tübingen, Germany
2 Department of Physics, University of Jyväskylä, P.O. Box 35, SF-40351 Jyväskylä, Finland
Received: 26 February 1998 / Revised version: 8 May 1998 Communicated by D. Schwalm
The solution of the Hartree-Fock-Bogoliubov problem with restoration of the broken symmetries before the variation has been generalized for the use of totally unrestricted quasi-particle determinants. With this method doubly-even, doubly-odd and odd nuclei can be treated on the same footing. Comparison with the results of complete shell-model diagonalizations shows that already one-determinant representations yield a very good approximation to the exact solutions even in the middle of the 1s0d shell. The problem is especially suited for numerical implementation on parallel computers. First tests show a linear dependence of the inverse CPU time with the number of processors used.
21.10.-k Properties of nuclei, nuclear energy levels - 21.60.Jz Hartree-Fock and random-phase approximation