Abstract
It is argued that there exist natural shell-model spaces optimally adapted to the operation of two variants of Elliott's SU3 symmetry that provide accurate predictions of quadrupole moments of deformed states. A self-consistent Nilsson-like calculation describes the competition between the realistic quadrupole force and the central field, indicating a remarkable stability of the quadrupole moments—which remain close to their quasi- and pseudo-SU3 values—as the single-particle splittings increase. A detailed study of the even nuclei from to reveals that the region of prolate deformation is bounded by a pair of transitional nuclei and in which prolate ground-state bands are predicted to dominate, though coexisting with oblate ones.
- Received 29 April 2014
- Revised 25 June 2015
DOI:https://doi.org/10.1103/PhysRevC.92.024320
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©2015 American Physical Society