Reflection Asymmetric Shell Model on the Projected Woods-Saxon+BCS Basis

The projected Woods-Saxon(WS) quasi-particle states have been used as the bases in the calculation of the reflection asymmetric shell model (RASM). The WS potential has been modified but constrainted to give the similar single-particle levels of the standard WS potential. Correspondingly, the multipole interactions in the total RASM Hamiltonian are constructed according to the modified WS potential. The calculated octupole band of ²²⁸Th from this approach is in good agreement with experimental data.