The calculated energy spectra, quadrupole moments, and quadrupole transitions for $4n$ nuclei in $d-s$ shell are reported. The framework of the generator coordinate method using angular momentum projected states from Hartree-Fock intrinsic states driven by an external quadrupole field is successfully employed. The agreement with experimental numbers is found to be quite satisfactory up to the middle of the $d-s$ shell. The excited $0^{+}$ levels and the electrical moments are satisfactorily explained.

NUCLEAR STRUCTURE ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$, ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$, ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$, ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$; calculated levels $J$, $q$, $B\left(E2\mathrm{}\right)\mathrm{}$. Generator coordinate method; constrained Hartree-Fock.

• Received 1 April 1974

DOI:https://doi.org/10.1103/PhysRevC.10.1189