Multiparticle-hole states of high spin in N < 50, A κ 90 nuclei: 4. Systematics of level energies and electromagnetic properties

The large body of recently measured energies and electromagnetic properties of high-spin states in the Z = 40-45, N = 46-50 isotopes is consistently accommodated in the shell model using empirical and schematic two-body matrix elements in the ( 1g _{9}/{2}, 2p _{1}/{2}) model space. In particular, we test the purity of seniority, the effects of an enlarged model space (including the 1f _{5}/{2}, 2p _{3}/{2} orbits) and the onset of quadrupole collectivity near N = 46. Furthermore, we give a summary of observed and predicted magnetic moments and lifetimes of long-lived high-spin states.