[en] The Hartree-Fock approximation, with the Skyrme force, is applied to the A=4n type of nuclei in the s-d shell. Energy levels and electric quadrupole transition probabilities within the ground state band are calculated from the projected states of good angular momentum. Strong approximations are made but the results concerning the spectra are better than those obtained with more sophisticated density independent two-body interactions. The transition rates are less sensitive to the interactions, as previously verified