ABSTRACT

The DSM model has been used extensively in the last three decades to analyze experimental data in the medium heavy mass region of the periodic table with A=60-100. The model has been quite successful in correctly reproducing the band structures, band crossings, and the nature of alignments, shape coexistence, occurrence of large ground state deformation and so on in this region. This program started around 1984 and led to the analysis of large number of isotopes of Ge to Zr [39,43,53-69]. Out of all these, we have chosen five applications of DSM for detailed discussion in this chapter. They are triple forking in 68Ge, shape coexistence in selenium isotopes, three-quasiparticle (3qp) bands in odd-even bromine isotopes, the band structure in 78Kr, identical bands in the odd-even isotope 77Sr and band structures in 77,79Sr . In all these studies 56Ni is assumed to be an inert core with the configuration space made up of 2p3/2,

1f5/2, 2p1/2 and

1g9/2 orbits. For brevity, from now on in this chapter we will use r3 for 2p3/2,

1f5/2, 2p1/2 orbits and g9/2 for

1g9/2 orbit.