High spin states of [Formula Presented] Zn isotope have been populated by [Formula Presented] Cr[Formula Presented] O, [Formula Presented]) reaction at a beam energy of 75 MeV. A total of 37 [Formula Presented] rays and 18 energy levels have been placed in the proposed level scheme, extending it up to an excitation energy of 9776 keV. Positive and negative parity states up to [Formula Presented][Formula Presented] and [Formula Presented], respectively, are found to be populated. A positive parity unfavored band and a negative parity band have been identified. The structure of this nucleus has been investigated in the framework of interacting boson-fermion model, incorporating both the quadrupole and the octupole excitations of the even-even [Formula Presented] Zn core. The structure of the positive parity yrast band is described in terms of a weak coupling of the [Formula Presented] neutron motion to the multiphonon excitations of the even-even core. Some of the high spin negative parity states observed in the experimental spectrum cannot be described within the framework of the present model. One of the possible reasons may be that these states have large contributions from noncollective two-quasiparticle-type excitations. Experimental branching ratios of some of the transitions are compared with the results of our calculation. © 1998 The American Physical Society.