The structure of collective bands in <SUP>68</SUP>Ge: a microscopic view

The collective bands of states of <SUP>68</SUP>Ge are studied using a deformed-configuration-mixing shell model based on Hartree-Fock intrinsic states. An effective interaction given by Kuo has been used. The configuration space includes the single-particle orbits 1p<SUB>3/2</SUB>, 0f<SUB>5/2</SUB>, 1p<SUB>1/2</SUB> and 0g<SUB>9/2</SUB>. The collective positive- and negative-parity states are classified into different bands on the basis of the E2 transition probabilities amongst them. The agreement with the experiment is quite satisfactory. An attempt has been made to understand the structure of the nearly degenerate triplet of the 8<SUP>+</SUP> states and their decay schemes