Excited States in ²⁰⁵Po

High-spin states in ²⁰⁵Po have been investigated by using in-beam γ ray spectroscopy with the ¹⁹⁶Pt(¹³C, 4n)²⁰⁵Po reaction at a beam energy of 72 MeV. The previously known level scheme has been extended, and 3 new decay sequence have been established by adding nineteen new γ rays. The yrast level structures in ^203,\,205,\,207\rmPo are compared with large-scale shell model calculations performed in a configuration space with the same proton and neutron orbits, which are 0h_9/2, 1f_5/2, 2p_3/2, 2p_1/2, 1g_9/2. The calculated results are in reasonable agreement with experimental data.