A multiconfiguration mixing approach with symmetryprojected complex HartreeFockBogoliubov determinants
Abstract
A multiconfiguration mixing approach built on essentially complex, symmetryprojected HartreeFockBogoliubov (HFB) mean fields is introduced. The mean fields are obtained by variation after projection. The configuration space consists out of the symmetryprojected HFB vacuum and the symmetryprojected twoquasiparticle excitations for even, and the symmetryprojected onequasiparticle excitations for odd A systems. The underlying complex HFB transformations are assumed to be timereversal invariant and axially symmetric. The model allows nuclear structure calculations in large model spaces with arbitrary twobody interactions. The approach has been applied to ^{20}Ne and ^{22}Ne. A good agreement with the exact shell model results and considerable improvement with respect to older calculations, in which only real HFB transformations were admitted, is obtained.
 Publication:

Nuclear Physics A
 Pub Date:
 February 1996
 DOI:
 10.1016/03759474(95)003878
 arXiv:
 arXiv:nuclth/9506007
 Bibcode:
 1996NuPhA.596....1B
 Keywords:

 Nuclear Theory
 EPrint:
 30 pages LaTeX file, 4 Postscript figures