Abstract
A deformed Hartree-Fock calculation with parity mixing reveals considerable octupole deformation for neutron rich barium nuclei. The energy surfaces for 142-148Ba as a function of octupole deformation are calculated and show a single humped shape with the minimum for positive octupole deformation slightly lower in energy. Parity mixing and octupole deformation show a typical shell effect and are negligible for 146Ce and 148Ce.
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