Studies on the HF states and the negative-parity spectra of even even Cd nuclei

Using modified surface delta interaction, enlarging the gds configuration space to include the 1h11/2 states with the negative-parity, the deformed Hartree-Fock calculations for the seven nuclei (104Cd, 106Cd, 108Cd, 110Cd, 112Cd, 114Cd and 116Cd) are performed. The ground-state and some particle-hole excited configurations are obtained. The calculated results show that there exist form transition and shape coexistence from mass number 104 to 116, and that the single-particle energy spectra are different not only for different mass number but also for different configurations of nuclei. At the same time, the approximate angular momentum projected Hartree-Fock (PDHF) method is applied to nuclei 108Cd and 110Cd. And both of their positive- and negative-parity bands are obtained. The results of calculated energy spectra are consistent with experimental spectra well