Co58: Structure of an odd-odd nucleus in the pf shell

High-spin states in the odd-odd 58Co nucleus have been studied with the fusion-evaporation reaction 51V (10B, p2n) using the γ -spectrometer Saci-Perere. Thirty-six new excited states up to spin 11+ and an excitation energy of 8.0 MeV have been observed, which are connected by 46 γ -ray transitions. Transition probabilities for 14 excited states were measured through the Doppler-shift attenuation method. The results are compared with shell-model calculations using the GXPF1 effective interaction, developed for use in the pf shell. These results were interpreted by considering particle-hole excitations with respect to the doubly magic N = Z = 28 core.